Develop Reference

How to remove a part of all strings in an array in javascript?

I want split array value .
for example
gUser[1] = CAR.BENZ.CCLASS.1962
gUser[2] = CAR.PORSCHE.911.2001
I want get string only BENZ.CLASS.1962 and PORSCHE.911.2001
How to split array value on java script?
#update.
not always CAR string.
so, not use substring.

You can use map to access each string in array then use replace. Use a regex to match string before '.' and replace only the first match, like this:
var gUser = ['CAR.BENZ.CCLASS.1962', 'CAR.PORSCHE.911.2001'];
var gUserModified = gUser.map(function(v){
return v.replace(/[^\.]+\./, '');
});
console.log(gUserModified);

Split it with dot then slice it and join it with dot
var gUser =[];
gUser[1] = "CAR.BENZ.CCLASS.1962";
gUser[2] = "CAR.PORSCHE.911.2001";
console.log(gUser[1].split('.').slice(1).join('.'));
console.log(gUser[2].split('.').slice(1).join('.'));

From your question, it's not clear if the array is a string array
If it is a string array you can do:
ES6+: gUser.map((user)=>{return user.split("CAR.")[1]})
ES5: gUser.map(function(user){return user.split("CAR.")[1]});

The below code is not tested but should probably work, with maybe minor tweaks
var splitStr = ''
var correctCarArr = []
for(let i = 0; i < gUser.length; i++){
splitStr = gUser[i].split('.')
let temp = ''
for(let j = 1; j < splitStr.length; j++){
temp += splitStr[j]
}
correctCarArr.push(temp)
}

var gUser = [];
gUser[1] = "CAR.BENZ.CCLASS.1962";
var gu1 = gUser[1].split(".");
gu1.shift();
console.log(gu1.join("."));

So here is the way without using any regex by only using string and array methods.
const gUser = ['CAR.BENZ.CCLASS.1962', 'CAR.PORSCHE.911.2001', 'XYZAB.PORSCHE.YSA.2021']
for (let i = 0; i < gUser.length; i++) {
console.log('Required String: ', gUser[i].split('.').slice(1).join('.'));
}
What we do is, we split the string into parts where . is encountered.
gUser[0].split('.') returns ['CAR', 'BENZ', 'CCLASS', '1962']
Later when slice(1) is called, the zeroth element of array is chopped off and will return ['BENZ', 'CCLASS', '1962']
And finally using join('.'), we merge the array elements to a single string with a . between each element, which returns BENZ.CCLASS.1962
Hope this helps! :)

Its easier split then shift the array to remove the first item like this:
gUser = ["CAR.BENZ.CCLASS.1962"];
var benz = gUser[0].split(".");
benz.shift();
alert(benz.join('.'));
There are other options from shift like slice(1) but In terms of performance, shift is apparently faster https://jsperf.com/shift-pop-vs-slice/4

Something Like This
`for(let index = 0; index < gUser.length; index++) {
console.log(gUser[index].split('.').splice(0, 1).join('.'));
}`
I haven't tested it. Please check and let me know

How to remove all characters before specific character in array data

I have a comma-separated string being pulled into my application from a web service, which lists a user's roles. What I need to do with this string is turn it into an array, so I can then process it for my end result. I've successfully converted the string to an array with jQuery, which is goal #1. Goal #2, which I don't know how to do, is take the newly created array, and remove all characters before any array item that contains '/', including '/'.
I created a simple work-in-progress JSFiddle: https://jsfiddle.net/2Lfo4966/
The string I receive is the following:
ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC
ABCD/ in the string above can change, and may be XYZ, MNO, etc.
To convert to an array, I've done the following:
var importUserRole = 'ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC';
var currentUserRole = importUserRole.split(',');
Using console.log, I get the following result:
["ABCD", "ABCD/Admin", "ABCD/DataManagement", "ABCD/XYZTeam", "ABCD/DriverUsers", "ABCD/RISC"]
I'm now at the point where I need the code to look at each index of array, and if / exists, remove all characters before / including /.
I've searched for a solution, but the JS solutions I've found are for removing characters after a particular character, and are not quite what I need to get this done.

You can use a single for loop to go through the array, then split() the values by / and retrieve the last value of that resulting array using pop(). Try this:
for (var i = 0; i < currentUserRole.length; i++) {
var data = currentUserRole[i].split('/');
currentUserRole[i] = data.pop();
}
Example fiddle
The benefit of using pop() over an explicit index, eg [1], is that this code won't break if there are no or multiple slashes within the string.
You could go one step further and make this more succinct by using map():
var importUserRole = 'ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC';
var currentUserRole = importUserRole.split(',').map(function(user) {
return user.split('/').pop();
});
console.log(currentUserRole);

You can loop through the array and perform this string replace:
currentUserRole.forEach(function (role) {
role = role.replace(/(.*\/)/g, '');
});

$(document).ready(function(){
var A=['ABCD','ABCD/Admin','ABCD/DataManagement','ABCD/XYZTeam','ABCD/DriverUsers','ABCD/RISC'];
$.each(A,function(i,v){
if(v.indexOf('/')){
var e=v.split('/');
A[i]=e[e.length-1];
}
})
console.log(A);
});

You could replace the unwanted parts.
var array = ["ABCD", "ABCD/Admin", "ABCD/DataManagement", "ABCD/XYZTeam", "ABCD/DriverUsers", "ABCD/RISC"];
array = array.map(function (a) {
return a.replace(/^.*\//, '');
});
console.log(array);

var importUserRole = 'ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC';
var currentUserRole = importUserRole.split(',');
for(i=0;i<currentUserRole.length;i++ ){
result = currentUserRole[i].split('/');
if(result[1]){
console.log(result[1]+'-'+i);
}
else{
console.log(result[0]+'-'+i);
}
}
In console, you will get required result and array index

I would do like this;
var iur = 'ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC',
arr = iur.split(",").map(s => s.split("/").pop());
console.log(arr);

You can use the split method as you all ready know string split method and then use the pop method that will remove the last index of the array and return the value remove pop method
var importUserRole = ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC';
var currentUserRole = importUserRole.split(',');
for(var x = 0; x < currentUserRole.length; x++;){
var data = currentUserRole[x].split('/');
currentUserRole[x] = data.pop();
}
Here is a long way
You can iterate the array as you have done then check if includes the caracter '/' you will take the indexOf and substact the string after the '/'
substring method in javaScript
var importUserRole = 'ABCD,ABCD/Admin,ABCD/DataManagement,ABCD/XYZTeam,ABCD/DriverUsers,ABCD/RISC';
var currentUserRole = importUserRole.split(',');
for(var x = 0; x < currentUserRole.length; x++){
if(currentUserRole[x].includes('/')){
var lastIndex = currentUserRole[x].indexOf('/');
currentUserRole[x] = currentUserRole[x].substr(lastIndex+1);
}
}

How to get string in regular expression with space

This is my input as string
'controls: ["aa.bb.cc","dd.ee.ff"],elements: []'
I want to get the result of the data in the controls meaning :
"aa.bb.cc","dd.ee.ff"
I tried pattern
/.*(controls:.*).*/
but I didn't get all the result
I think my problem is becuase the new line

You can do it with regEx
var c = 'controls: ["aa.bb.cc", "dd.ee.ff"], elements: []';
var match = c.match(/("[a-z.]+")/g);
// or c.match(/([a-z][a-z][.][a-z][a-z][.][a-z][a-z])/);
// to strictly match letters . letters . letters
// or for a shorter match: c.match(/(\w+[.]\w+[.]\w+)/);
console.log(match); // an array of your values
EDIT:
if you only want to get the values in controls and not element, you can get the controls values out with the regEx /controls: ([\["a-z., \]]+,)/g

You could simply parse your input as a JSON object then loop throught the controls array:
var input='controls: ["aa.bb.cc", "dd.ee.ff"],
elements: []';
json = JSON.parse(input);
var controls=json.controls;
//then loop throught the controls values
for(var i=0;i<controls.length;i++){
console.log(controls[i]);
}
I think that should do it.

This might look like a very crude solution, but it works.
This expression will give you aa.bb.cc :
var res = str.match(/controls: \[(.*)\]/)[1].match(/\"(.*)\",\"(.*)\"/)[1]
and this will give the next element i.e. dd.ee.ff
var res = str.match(/controls: \[(.*)\]/)[1].match(/\"(.*)\",\"(.*)\"/)[2]
In general,
var str = "controls: [\"aa.bb.cc\",\"dd.ee.ff\"],elements: []";
var resLength = str.match(/controls: \[(.*)\]/)[1].match(/\"(.*)\",\"(.*)\"/).length;
var res = str.match(/controls: \[(.*)\]/)[1].match(/\"(.*)\",\"(.*)\"/);
for (var i=1; i<resLength; i++) {
console.log(res[i]);
}

How Do I Parse a Pipe-Delimited String into Key-Value Pairs in Javascript

I want to parse the following sort of string into key-value pairs in a Javascript object:
var stringVar = 'PLNC||0|EOR|<br>SUBD|Pines|1|EOR|<br>CITY|Fort Myers|1|EOR|<br>';
Each word of 4 capital letters (PLNC, SUBD, and CITY) is to be a key, while the word(s) in the immediately following pipe are to be the value (the first one, for PLNC, would be undefined, the one for SUBD would be 'Pines', the one for CITY would be 'Fort Myers').
Note that '|EOR|' immediately precedes every key-value pair.
What is the best way of doing this?

I just realised it's technically a csv format with interesting line endings. There are limitations to this in that your variable values cannot contain any | or < br> since they are the tokens which define the structure of the string. You could of course escape them.
var stringVar = 'PLNC||0|EOR|<br>SUBD|Pines|1|EOR|<br>CITY|Fort Myers|1|EOR|<br>';
function decodeString(str, variable_sep, line_endings)
{
var result = [];
var lines = str.split(line_endings);
for (var i=0; i<lines.length; i++) {
var line = lines[i];
var variables = line.split(variable_sep);
if (variables.length > 1) {
result[variables[0]] = variables[1];
}
}
return result;
}
var result = decodeString(stringVar, "|", "<br>");
console.log(result);

If you have underscore (and if you don't, then just try this out by opening up your console on their webpage, because they've got underscore included :)
then play around with it a bit. Here's a start for your journey:
_.compact(stringVar.split(/<br>|EOR|\|/))

Try
function parse(str) {
var str = str.replace(/<br>/gi);
console.log(str);
var arr = str.split('|');
var obj = {};
for (var i=0; i<arr.length; i=i+4) {
var key = arr[i] || '';
var val_1 = arr[i+1] || '';
var val_2 = arr[i+2] || '';
if(key) {
obj[key] = val_1 + ':' + val_2; //or similar
}
}
return obj;
}
DEMO
This will work on the particular data string in the question.
It will also work on other data string of the same general format, but relies on :
<br> being discardable before parsing
every record being a group of 4 string elements delineated by | (pipe)
first element of each record is the key
second and third elements combine to form the value
fourth element is discardable.

How to parse data in javascript using regex?

How can I use regex in javascript to put items and its values in a array ?
This is my data sample:
battery.voltage: 13.50
battery.voltage.nominal: 12.0
beeper.status: enabled
device.type: ups
driver.name: blazer_ser
driver.parameter.pollinterval: 2
Thanks

use the below code to do that... here variable data contains your data...
data=data.split(/\n+/);
var output={};
for(var i=0;i<data.length;i++){
var a=data[i].split(/:\040+/);
output[a[0]]=a[1];
}
These codes will give you an array like below...
Array (
battery.voltage: "13.50",
battery.voltage: "12.0",
beeper.status: "enabled",
device.type: "ups",
driver.name: "blazer_ser",
driver.parameter.pollinterval: "2"
)
Example:
output['driver.name'] === "blazer_ser"

Why use regular expression, you can simply use substr and indexOf. Assuming you have your list stored in an array you can simply loop through the entries and split on the first occurrence of a colon.
var items = [...]; // Your items.
var arr = {};
for (var i = items.length - 1; i >= 0; i--) {
var key = items[i].substr(0, items[i].indexOf(':'));
var value = items[i].substr(items[i].indexOf(':') + 1).trim();
arr[key] = value;
}
This solution will only work in browsers implementing the trim method. If you want to be on the save side you can overwrite the String.prototype and add the trim method. (See Trim string in JavaScript?)
If you have your items as a string separated by newlines you can easily split it into an array through split;
var list = "battery.voltage: 13.50\n"
+ "battery.voltage.nominal: 12.0\n"
+ "beeper.status: enabled\n"
+ "device.type: ups\n"
+ "driver.name: blazer_ser\n"
+ "driver.parameter.pollinterval: 2";​​
var items = list.split(/\n/);
DEMO

Here's a solution that makes only one pass through the string data using a single regex:
var list = "battery.voltage: 13.50\n"
+ "battery.voltage.nominal: 12.0\n"
+ "beeper.status: enabled\n"
+ "device.type: ups\n"
+ "driver.name: blazer_ser\n"
+ "driver.parameter.pollinterval: 2";
function parse(data) {
var match, result = {};
var pattern = /\s*([^:\s]+)\s*:\s*([^:\s]+)$/gm;
while (match = pattern.exec(data)) {
result[match[1]] = match[2];
}
return result;
}
var test = parse(list);
// dump array
for (var i in test)
console.log(i + ": " + test[i]);
// select one
console.log(test["driver.parameter.pollinterval"]);
Click here to try it out on jsfiddle