How to log both variable and its name? [duplicate]

How to log both variable and its name? [duplicate] - javascript

This question already has answers here:
How to console log the name of a variable/function?
(6 answers)
Closed 3 years ago.
I find myself typing this repeatedly for debugging in my code. Is there a way to create a function for this?
var abc = 1
console.log("abc = "+abc);
var xyz = 2;
console.log("xyz = "+xyz);
I would like to create a function like this:
logVar = function(input){
console.log(input.name()+" = "+input);
}
Is there a way to do this?
logVar(abc) should return "abc = 1"
logVar(xyz) should return "xyz = 2"

You have to enclose you var in a object to get its name as a key:
var myVar = 'John Doe';
console.log({myVar}); // result {"myVar": "John Doe"}

You can create an object from your variable which you pass into logVar.Then, in your function, you can use Object.entires to get the name of the variable and the value of the variable.
See example below:
var logVar = function (input) {
var [[name, val]] = Object.entries(input);
console.log(name, "=", val);
}
var abc = 1;
var xyz = 2;
logVar({abc}); // abc = 1
logVar({xyz}); // xyz = 2

Though this is not a proper solution, you can loop over the window object, but you can get other identifiers as well which hold the same value as the passed in argument. This only works in global scope & not while in function scope.
var ident = "wowowowow";
console.log(getIdentifierName(ident));
function getIdentifierName(identifier) {
for (var prop in window) {
if (window[prop] === identifier) {
console.log(identifier);
}
}
}

This should work:
var abc = 1;
logVar = function(input) {
console.log(input);
}
logVar({
abc
});
The output should be something like : { abc: 1 }

Related

Is it possible to get the object name passed into a function as a variable from within the function [duplicate]

Is there a way to get a variable name as a string in Javascript? (like NSStringFromSelector in Cocoa)
I would like to do like this:
var myFirstName = 'John';
alert(variablesName(myFirstName) + ":" + myFirstName);
--> myFirstName:John
UPDATE
I'm trying to connect a browser and another program using JavaScript. I would like to send instance names from a browser to another program for callback method:
FooClass = function(){};
FooClass.someMethod = function(json) {
// Do something
}
instanceA = new FooClass();
instanceB = new FooClass();
doSomethingInAnotherProcess(instanceB); // result will be substituted by using instanceB.someMethod();
...
From another program:
evaluateJavascriptInBrowser("(instanceName).someMethod("resultA");");
In PHP:
How to get a variable name as a string in PHP?

Like Seth's answer, but uses Object.keys() instead:
const varToString = varObj => Object.keys(varObj)[0]
const someVar = 42
const displayName = varToString({ someVar })
console.log(displayName)

You can use the following solution to solve your problem:
const myFirstName = 'John'
Object.keys({myFirstName})[0]
// returns "myFirstName"

Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(key + ': ' + obj[key]);

In ES6, you could write something like:
let myVar = 'something';
let nameObject = {myVar};
let getVarNameFromObject = (nameObject) => {
for(let varName in nameObject) {
return varName;
}
}
let varName = getVarNameFromObject(nameObject);
console.log(varName);
Not really the best looking thing, but it gets the job done.
This leverages ES6's object destructuring.
More info here: https://hacks.mozilla.org/2015/05/es6-in-depth-destructuring/

Get a string from any valid Javascript (variable, class):
const nameOf = (f) => (f).toString().replace(/[ |\(\)=>]/g,'');
Examples:
nameOf(() => myVariable) // myVariable
nameOf(() => myVariable.name) // myVariable.name
nameOf(() => myVariable.name.length) // myVariable.name.length
nameOf(() => myVariable.name[10]) // myVariable.name[10]
nameOf(() => MySuperClass) // MySuperClass

Probably pop would be better than indexing with [0], for safety (variable might be null).
const myFirstName = 'John'
const variableName = Object.keys({myFirstName}).pop();
console.log(`Variable ${variableName} with value '${myFirstName}'`);
// returns "Variable myFirstName with value 'John'"

var x = 2;
for(o in window){
if(window[o] === x){
alert(o);
}
}
However, I think you should do like "karim79"

This works for basic expressions
const nameof = exp => exp.toString().match(/[.](\w+)/)[1];
Example
nameof(() => options.displaySize);
Snippet:
var nameof = function (exp) { return exp.toString().match(/[.](\w+)/)[1]; };
var myFirstName = 'Chuck';
var varname = nameof(function () { return window.myFirstName; });
console.log(varname);

var somefancyvariable = "fancy";
Object.keys({somefancyvariable})[0];
This isn't able to be made into a function as it returns the name of the function's variable.
// THIS DOESN'T WORK
function getVarName(v) {
return Object.keys({v})[0];
}
// Returns "v"
Edit: Thanks to #Madeo for pointing out how to make this into a function.
function debugVar(varObj) {
var varName = Object.keys(varObj)[0];
console.log("Var \"" + varName + "\" has a value of \"" + varObj[varName] + "\"");
}
You will need call the function with a single element array containing the variable. debugVar({somefancyvariable});
Edit: Object.keys can be referenced as just keys in every browser I tested it in but according to the comments it doesn't work everywhere.

Shortest way I have found so far to get the variables name as a string:
const name = obj => Object.keys(obj)[0];
const whatsMyName = "Snoop Doggy Dogg";
console.log( "Variable name is: " + name({ whatsMyName }) );
//result: Variable name is: whatsMyName

Since ECMAScript 5.1 you can use Object.keys to get the names of all properties from an object.
Here is an example:
// Get John’s properties (firstName, lastName)
var john = {firstName: 'John', lastName: 'Doe'};
var properties = Object.keys(john);
// Show John’s properties
var message = 'John’s properties are: ' + properties.join(', ');
document.write(message);

best way using Object.keys();
example : for getting multi variables names in global scope
// multi variables for testing
var x = 5 , b = true , m = 6 , v = "str";
// pass all variables you want in object
function getVarsNames(v = {}){
// getting keys or names !
let names = Object.keys(v);
// return array contain all names of variables
return names;
}
// testing if that work or not
let VarsNames = getVarsNames({x , b , m , v});
console.log(VarsNames); // output is array [x , b , m , v]

This worked using Internet Explorer (9, 10 and 11), Google Chrome 5:
var myFirstName = "Danilo";
var varName = Object.keys({myFirstName:0})[0];
console.log(varName);
Browser compatibility table:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys

For those who would like to print variableName and variableValue for debugging purposes, here is a function:
const printNameValue = (v)=> {
var varName = (v).toString().replace(/[ |\(\)=>]/g, '')
var varValue = (v)()
// neat : console.log(varName,varValue);
// with some coloring :
console.log("\033[1;96m[\033[1;33m " + varName + " :\033[0;0m " + varValue+"\033[1;96m ]\033[0;0m");
}
Example:
const myNiceVariable = 1234
call:
printNameValue(()=> myNiceVariable )
result:

You can reflect on types in javascript and get the name of properties and methods but what you need is sth like Lambda Expressions Trees in .NET, I think it's not be possible due to dynamic nature and lack of static type system in javascript.

I needed this, don't want to use objects, and came up with the following solution, turning the question around.
Instead of converting the variable name into a string, I convert a string into a variable.
This only works if the variable name is known of course.
Take this:
var height = 120;
testAlert(height);
This should display:
height: 120
This can be done like this:
function testAlert(ta)
{
a = window[ta];
alert(ta + ': ' + a);
}
var height = 120;
testAlert("height");
// displays: height: 120
So I use the string "height" and turn that into a variable height using the window[] command.

When having a function write a function that changes different global variables values it is not always myfirstname it is whatever happens to be passing through. Try this worked for me.
Run in jsfiddle
var jack = 'jill';
function window_getVarName(what)
{
for (var name in window)
{
if (window[name]==what)
return(name);
}
return("");
}
document.write(window_getVarName(jack));
Will write to the window 'jack'.

I've created this function based on JSON as someone suggested, works fine for my debug needs
function debugVar(varNames){
let strX = "";
function replacer(key, value){
if (value === undefined){return "undef"}
return value
}
for (let arg of arguments){
let lastChar;
if (typeof arg!== "string"){
let _arg = JSON.stringify(arg, replacer);
_arg = _arg.replace('{',"");
_arg = _arg.replace('}',"");
_arg = _arg.replace(/:/g,"=");
_arg = _arg.replace(/"/g,"");
strX+=_arg;
}else{
strX+=arg;
lastChar = arg[arg.length-1];
}
if (arg!==arguments[arguments.length-1]&&lastChar!==":"){strX+=" "};
}
console.log(strX)
}
let a = 42, b = 3, c;
debugVar("Begin:",{a,b,c},"end")

If you're looking for something quick and dirty, this might work:
var zox = 150;
cl("zox");
function cl(c) {
console.log(c + ': ' + this[c]); // zox: 150
}

No, there is not.
Besides, if you can write variablesName(myFirstName), you already know the variable name ("myFirstName").

How to print the variable name it self in javascript console [duplicate]

Is there a way to get a variable name as a string in Javascript? (like NSStringFromSelector in Cocoa)
I would like to do like this:
var myFirstName = 'John';
alert(variablesName(myFirstName) + ":" + myFirstName);
--> myFirstName:John
UPDATE
I'm trying to connect a browser and another program using JavaScript. I would like to send instance names from a browser to another program for callback method:
FooClass = function(){};
FooClass.someMethod = function(json) {
// Do something
}
instanceA = new FooClass();
instanceB = new FooClass();
doSomethingInAnotherProcess(instanceB); // result will be substituted by using instanceB.someMethod();
...
From another program:
evaluateJavascriptInBrowser("(instanceName).someMethod("resultA");");
In PHP:
How to get a variable name as a string in PHP?

Like Seth's answer, but uses Object.keys() instead:
const varToString = varObj => Object.keys(varObj)[0]
const someVar = 42
const displayName = varToString({ someVar })
console.log(displayName)

You can use the following solution to solve your problem:
const myFirstName = 'John'
Object.keys({myFirstName})[0]
// returns "myFirstName"

Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(key + ': ' + obj[key]);

In ES6, you could write something like:
let myVar = 'something';
let nameObject = {myVar};
let getVarNameFromObject = (nameObject) => {
for(let varName in nameObject) {
return varName;
}
}
let varName = getVarNameFromObject(nameObject);
console.log(varName);
Not really the best looking thing, but it gets the job done.
This leverages ES6's object destructuring.
More info here: https://hacks.mozilla.org/2015/05/es6-in-depth-destructuring/

Get a string from any valid Javascript (variable, class):
const nameOf = (f) => (f).toString().replace(/[ |\(\)=>]/g,'');
Examples:
nameOf(() => myVariable) // myVariable
nameOf(() => myVariable.name) // myVariable.name
nameOf(() => myVariable.name.length) // myVariable.name.length
nameOf(() => myVariable.name[10]) // myVariable.name[10]
nameOf(() => MySuperClass) // MySuperClass

Probably pop would be better than indexing with [0], for safety (variable might be null).
const myFirstName = 'John'
const variableName = Object.keys({myFirstName}).pop();
console.log(`Variable ${variableName} with value '${myFirstName}'`);
// returns "Variable myFirstName with value 'John'"

var x = 2;
for(o in window){
if(window[o] === x){
alert(o);
}
}
However, I think you should do like "karim79"

This works for basic expressions
const nameof = exp => exp.toString().match(/[.](\w+)/)[1];
Example
nameof(() => options.displaySize);
Snippet:
var nameof = function (exp) { return exp.toString().match(/[.](\w+)/)[1]; };
var myFirstName = 'Chuck';
var varname = nameof(function () { return window.myFirstName; });
console.log(varname);

var somefancyvariable = "fancy";
Object.keys({somefancyvariable})[0];
This isn't able to be made into a function as it returns the name of the function's variable.
// THIS DOESN'T WORK
function getVarName(v) {
return Object.keys({v})[0];
}
// Returns "v"
Edit: Thanks to #Madeo for pointing out how to make this into a function.
function debugVar(varObj) {
var varName = Object.keys(varObj)[0];
console.log("Var \"" + varName + "\" has a value of \"" + varObj[varName] + "\"");
}
You will need call the function with a single element array containing the variable. debugVar({somefancyvariable});
Edit: Object.keys can be referenced as just keys in every browser I tested it in but according to the comments it doesn't work everywhere.

Shortest way I have found so far to get the variables name as a string:
const name = obj => Object.keys(obj)[0];
const whatsMyName = "Snoop Doggy Dogg";
console.log( "Variable name is: " + name({ whatsMyName }) );
//result: Variable name is: whatsMyName

Since ECMAScript 5.1 you can use Object.keys to get the names of all properties from an object.
Here is an example:
// Get John’s properties (firstName, lastName)
var john = {firstName: 'John', lastName: 'Doe'};
var properties = Object.keys(john);
// Show John’s properties
var message = 'John’s properties are: ' + properties.join(', ');
document.write(message);

best way using Object.keys();
example : for getting multi variables names in global scope
// multi variables for testing
var x = 5 , b = true , m = 6 , v = "str";
// pass all variables you want in object
function getVarsNames(v = {}){
// getting keys or names !
let names = Object.keys(v);
// return array contain all names of variables
return names;
}
// testing if that work or not
let VarsNames = getVarsNames({x , b , m , v});
console.log(VarsNames); // output is array [x , b , m , v]

This worked using Internet Explorer (9, 10 and 11), Google Chrome 5:
var myFirstName = "Danilo";
var varName = Object.keys({myFirstName:0})[0];
console.log(varName);
Browser compatibility table:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys

For those who would like to print variableName and variableValue for debugging purposes, here is a function:
const printNameValue = (v)=> {
var varName = (v).toString().replace(/[ |\(\)=>]/g, '')
var varValue = (v)()
// neat : console.log(varName,varValue);
// with some coloring :
console.log("\033[1;96m[\033[1;33m " + varName + " :\033[0;0m " + varValue+"\033[1;96m ]\033[0;0m");
}
Example:
const myNiceVariable = 1234
call:
printNameValue(()=> myNiceVariable )
result:

You can reflect on types in javascript and get the name of properties and methods but what you need is sth like Lambda Expressions Trees in .NET, I think it's not be possible due to dynamic nature and lack of static type system in javascript.

I needed this, don't want to use objects, and came up with the following solution, turning the question around.
Instead of converting the variable name into a string, I convert a string into a variable.
This only works if the variable name is known of course.
Take this:
var height = 120;
testAlert(height);
This should display:
height: 120
This can be done like this:
function testAlert(ta)
{
a = window[ta];
alert(ta + ': ' + a);
}
var height = 120;
testAlert("height");
// displays: height: 120
So I use the string "height" and turn that into a variable height using the window[] command.

When having a function write a function that changes different global variables values it is not always myfirstname it is whatever happens to be passing through. Try this worked for me.
Run in jsfiddle
var jack = 'jill';
function window_getVarName(what)
{
for (var name in window)
{
if (window[name]==what)
return(name);
}
return("");
}
document.write(window_getVarName(jack));
Will write to the window 'jack'.

I've created this function based on JSON as someone suggested, works fine for my debug needs
function debugVar(varNames){
let strX = "";
function replacer(key, value){
if (value === undefined){return "undef"}
return value
}
for (let arg of arguments){
let lastChar;
if (typeof arg!== "string"){
let _arg = JSON.stringify(arg, replacer);
_arg = _arg.replace('{',"");
_arg = _arg.replace('}',"");
_arg = _arg.replace(/:/g,"=");
_arg = _arg.replace(/"/g,"");
strX+=_arg;
}else{
strX+=arg;
lastChar = arg[arg.length-1];
}
if (arg!==arguments[arguments.length-1]&&lastChar!==":"){strX+=" "};
}
console.log(strX)
}
let a = 42, b = 3, c;
debugVar("Begin:",{a,b,c},"end")

If you're looking for something quick and dirty, this might work:
var zox = 150;
cl("zox");
function cl(c) {
console.log(c + ': ' + this[c]); // zox: 150
}

No, there is not.
Besides, if you can write variablesName(myFirstName), you already know the variable name ("myFirstName").

Get name of object In String Javascript [duplicate]

Is there a way to get a variable name as a string in Javascript? (like NSStringFromSelector in Cocoa)
I would like to do like this:
var myFirstName = 'John';
alert(variablesName(myFirstName) + ":" + myFirstName);
--> myFirstName:John
UPDATE
I'm trying to connect a browser and another program using JavaScript. I would like to send instance names from a browser to another program for callback method:
FooClass = function(){};
FooClass.someMethod = function(json) {
// Do something
}
instanceA = new FooClass();
instanceB = new FooClass();
doSomethingInAnotherProcess(instanceB); // result will be substituted by using instanceB.someMethod();
...
From another program:
evaluateJavascriptInBrowser("(instanceName).someMethod("resultA");");
In PHP:
How to get a variable name as a string in PHP?

Like Seth's answer, but uses Object.keys() instead:
const varToString = varObj => Object.keys(varObj)[0]
const someVar = 42
const displayName = varToString({ someVar })
console.log(displayName)

You can use the following solution to solve your problem:
const myFirstName = 'John'
Object.keys({myFirstName})[0]
// returns "myFirstName"

Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.
var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
console.log(key + ': ' + obj[key]);

In ES6, you could write something like:
let myVar = 'something';
let nameObject = {myVar};
let getVarNameFromObject = (nameObject) => {
for(let varName in nameObject) {
return varName;
}
}
let varName = getVarNameFromObject(nameObject);
console.log(varName);
Not really the best looking thing, but it gets the job done.
This leverages ES6's object destructuring.
More info here: https://hacks.mozilla.org/2015/05/es6-in-depth-destructuring/

Get a string from any valid Javascript (variable, class):
const nameOf = (f) => (f).toString().replace(/[ |\(\)=>]/g,'');
Examples:
nameOf(() => myVariable) // myVariable
nameOf(() => myVariable.name) // myVariable.name
nameOf(() => myVariable.name.length) // myVariable.name.length
nameOf(() => myVariable.name[10]) // myVariable.name[10]
nameOf(() => MySuperClass) // MySuperClass

Probably pop would be better than indexing with [0], for safety (variable might be null).
const myFirstName = 'John'
const variableName = Object.keys({myFirstName}).pop();
console.log(`Variable ${variableName} with value '${myFirstName}'`);
// returns "Variable myFirstName with value 'John'"

var x = 2;
for(o in window){
if(window[o] === x){
alert(o);
}
}
However, I think you should do like "karim79"

This works for basic expressions
const nameof = exp => exp.toString().match(/[.](\w+)/)[1];
Example
nameof(() => options.displaySize);
Snippet:
var nameof = function (exp) { return exp.toString().match(/[.](\w+)/)[1]; };
var myFirstName = 'Chuck';
var varname = nameof(function () { return window.myFirstName; });
console.log(varname);

var somefancyvariable = "fancy";
Object.keys({somefancyvariable})[0];
This isn't able to be made into a function as it returns the name of the function's variable.
// THIS DOESN'T WORK
function getVarName(v) {
return Object.keys({v})[0];
}
// Returns "v"
Edit: Thanks to #Madeo for pointing out how to make this into a function.
function debugVar(varObj) {
var varName = Object.keys(varObj)[0];
console.log("Var \"" + varName + "\" has a value of \"" + varObj[varName] + "\"");
}
You will need call the function with a single element array containing the variable. debugVar({somefancyvariable});
Edit: Object.keys can be referenced as just keys in every browser I tested it in but according to the comments it doesn't work everywhere.

Shortest way I have found so far to get the variables name as a string:
const name = obj => Object.keys(obj)[0];
const whatsMyName = "Snoop Doggy Dogg";
console.log( "Variable name is: " + name({ whatsMyName }) );
//result: Variable name is: whatsMyName

Since ECMAScript 5.1 you can use Object.keys to get the names of all properties from an object.
Here is an example:
// Get John’s properties (firstName, lastName)
var john = {firstName: 'John', lastName: 'Doe'};
var properties = Object.keys(john);
// Show John’s properties
var message = 'John’s properties are: ' + properties.join(', ');
document.write(message);

best way using Object.keys();
example : for getting multi variables names in global scope
// multi variables for testing
var x = 5 , b = true , m = 6 , v = "str";
// pass all variables you want in object
function getVarsNames(v = {}){
// getting keys or names !
let names = Object.keys(v);
// return array contain all names of variables
return names;
}
// testing if that work or not
let VarsNames = getVarsNames({x , b , m , v});
console.log(VarsNames); // output is array [x , b , m , v]

This worked using Internet Explorer (9, 10 and 11), Google Chrome 5:
var myFirstName = "Danilo";
var varName = Object.keys({myFirstName:0})[0];
console.log(varName);
Browser compatibility table:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys

For those who would like to print variableName and variableValue for debugging purposes, here is a function:
const printNameValue = (v)=> {
var varName = (v).toString().replace(/[ |\(\)=>]/g, '')
var varValue = (v)()
// neat : console.log(varName,varValue);
// with some coloring :
console.log("\033[1;96m[\033[1;33m " + varName + " :\033[0;0m " + varValue+"\033[1;96m ]\033[0;0m");
}
Example:
const myNiceVariable = 1234
call:
printNameValue(()=> myNiceVariable )
result:

You can reflect on types in javascript and get the name of properties and methods but what you need is sth like Lambda Expressions Trees in .NET, I think it's not be possible due to dynamic nature and lack of static type system in javascript.

I needed this, don't want to use objects, and came up with the following solution, turning the question around.
Instead of converting the variable name into a string, I convert a string into a variable.
This only works if the variable name is known of course.
Take this:
var height = 120;
testAlert(height);
This should display:
height: 120
This can be done like this:
function testAlert(ta)
{
a = window[ta];
alert(ta + ': ' + a);
}
var height = 120;
testAlert("height");
// displays: height: 120
So I use the string "height" and turn that into a variable height using the window[] command.

When having a function write a function that changes different global variables values it is not always myfirstname it is whatever happens to be passing through. Try this worked for me.
Run in jsfiddle
var jack = 'jill';
function window_getVarName(what)
{
for (var name in window)
{
if (window[name]==what)
return(name);
}
return("");
}
document.write(window_getVarName(jack));
Will write to the window 'jack'.

I've created this function based on JSON as someone suggested, works fine for my debug needs
function debugVar(varNames){
let strX = "";
function replacer(key, value){
if (value === undefined){return "undef"}
return value
}
for (let arg of arguments){
let lastChar;
if (typeof arg!== "string"){
let _arg = JSON.stringify(arg, replacer);
_arg = _arg.replace('{',"");
_arg = _arg.replace('}',"");
_arg = _arg.replace(/:/g,"=");
_arg = _arg.replace(/"/g,"");
strX+=_arg;
}else{
strX+=arg;
lastChar = arg[arg.length-1];
}
if (arg!==arguments[arguments.length-1]&&lastChar!==":"){strX+=" "};
}
console.log(strX)
}
let a = 42, b = 3, c;
debugVar("Begin:",{a,b,c},"end")

If you're looking for something quick and dirty, this might work:
var zox = 150;
cl("zox");
function cl(c) {
console.log(c + ': ' + this[c]); // zox: 150
}

No, there is not.
Besides, if you can write variablesName(myFirstName), you already know the variable name ("myFirstName").

declaring object using variable [duplicate]

This question already has answers here:
How to use a variable for a key in a JavaScript object literal?
(16 answers)
Closed 3 years ago.
I am trying to use a variable when declaring an object:
var name1 = "object1";
var data1 = 3;
create_object(name1, data1);
function create_object(name, data) {
var x = {
name: data
}
return x
}
I want x to be stored as
var x = {
object1: 3
}
But my function will make
var x = {
name: 3
}
Is there a way to pass a variable when declaring the name of a child inside an object?
Thanks a lot

To specify a name of a property from a variable you need to use the square brackets notation like this:
function create_object(name, data) {
var x = {};
x[name] = data;
return x;
}

Print / display a JavaScript variable's name instead of it's value

Is it possible to print / display a JavaScript variable's name? For example:
var foo=5;
var bar=6;
var foobar=foo+bar;
document.write(foo+ "<br>");
document.write(bar+ "<br>");
document.write(foobar + "<br>");
How would we print the variable's names so the output would be:
foo
bar
foobar
Rather than:
5
6
11

You can put the variables in an object then easily print them this way: http://jsfiddle.net/5MVde/7/
See fiddle for everything, this is the JavaScript...
var x = {
foo: 5,
bar: 6,
foobar: function (){
var that=this;
return that.foo+that.bar
}
};
var myDiv = document.getElementById("results");
myDiv.innerHTML='Variable Names...';
for(var variable in x)
{
//alert(variable);
myDiv.innerHTML+='<br>'+variable;
}
myDiv.innerHTML+='<br><br>And their values...';
myDiv.innerHTML+='<br>'+x.foo+'<br>'+x.bar+'<br>'+x.foobar();
The JavaScript for...in statement loops through the properties of an object.
Another variation (thanks #elclanrs) if you don't want foobar to be a function: http://jsfiddle.net/fQ5hE/2/

Utils = {
eventRegister_globalVariable : function(variableName,handlers){
eventRegister_JsonVariable(this,variableName,handlers);
},
eventRegister_jsonVariable : function(jsonObj,variableName,handlers){
if(jsonObj.eventRegisteredVariable === undefined) {
jsonObj.eventRegisteredVariable={};//this Object is used for trigger event in javascript variable value changes ku
}
Object.defineProperty(jsonObj, variableName , {
get: function() {
return jsonObj.eventRegisteredVariable[variableName] },
set: function(value) {
jsonObj.eventRegisteredVariable[variableName] = value; handlers(jsonObj.eventRegisteredVariable[variableName]);}
});
}

Another possible solution can be "Object.keys(this)".... This will give you all the variable names in an array.

Develop Reference

JavaScript is the programming language of the Web.

How to log both variable and its name? [duplicate] - javascript

You have to enclose you var in a object to get its name as a key: var myVar = 'John Doe'; console.log({myVar}); // result {"myVar": "John Doe"}

This should work: var abc = 1; logVar = function(input) { console.log(input); } logVar({ abc }); The output should be something like : { abc: 1 }

Related

Is it possible to get the object name passed into a function as a variable from within the function [duplicate]

How to print the variable name it self in javascript console [duplicate]

Get name of object In String Javascript [duplicate]

declaring object using variable [duplicate]

Print / display a JavaScript variable's name instead of it's value

Categories

Resources