I want to get the value from array. I am using javascript.
My array is
[{"username1" : "123456"},{"username2" : "121"}]
I want to get the value of username1. I want print 123456 using username1. How it possible? Please help me? My code is shown below.
var categories = [];
categories.push({"username1" : "123456"});
for (var i = 0; i < categories.length; i++) {
for (var categoryid in categories[i]) {
var category = categories[i][categoryid];
// log progress to the console
console.log(categoryid + " : " + category);
}
It shows print all values and object in array.
That is not an "associative array" - it is a single dimensional array of objects.
An associative array would look like
var myArr = {"username1" : "123456","username2" : "121"};
And you would et your value using
var result = myArr.username1;
//or
var result = myArr["username1"];
To access your value using the example you posted you would use
var result = myArr.filter(x => x.username1)[0].username1;
Related
I want to show only the country name like India,Srilanka etc.
{"result":1,"countries":[
{"country_id":"1","country_name":"Afghanistan"},
{"country_id":"2","country_name":"Albania"},
{"country_id":"3","country_name":"Algeria"},
{"country_id":"4","country_name":"American Samoa"},
{"country_id":"5","country_name":"Andorra"},
{"country_id":"6","country_name":"Angola"},
{"country_id":"7","country_name":"Anguilla"}
]
}
Below I have created JSON object same as yours:
var text = '{"result":1,"countries":[' +
'{"country_id":"1","country_name":"Afghanistan"},' +
'{"country_id":"2","country_name":"Albania"},' +
'{"country_id":"3","country_name":"Algeria"}'+
']}';
var obj = JSON.parse(text);
you can loop through JSON object and get each property value as below:
for(i = 0; i < obj.countries.length ; i++)
{
console.log(obj.countries[i].country_name);
}
Hope This Will Help!
why no iterate the objects and pull that data into a separate array? for example:
[[{"country_id":"1","country_name":"Afghanistan"},{"country_id":"2","country_name":"Albania"},{"country_id":"3","country_name":"Algeria"},{"country_id":"4","country_name":"American Samoa"},{"country_id":"5","country_name":"Andorra"},{"country_id":"6","country_name":"Angola"},{"country_id":"7","country_name":"Anguilla"}]]
.forEach(function(element) {
console.log(element.country_name);
});
I have a variable which contains data like this
var values = "VItDTotal,123,234,234,2345,1234,123,435,10,TestCase,123,234,234,2345,1234,123,435,5"
and I want to convert this string of data to a two dimensional array like this
[VItDTotal,123,234,234,2345,1234,123,435,10] //1st row
[TestCase, 123,234,234,2345,1234,123,435,5] //2nd row
How can I convert a JS variable to a two dimensional array?
I want to append these values to a datatable, how can I achieve this by using jQuery?
I hope this might help...
var values = "VItDTotal,123,234,234,2345,1234,123,435,10,TestCase,123,234,234,2345,1234,123,435,5"
var splittedArray = values.split(',')
var resultArray = new Array();
var resultKey = -1;
for(var i=0; i<splittedArray.length; i++) {
if(isNaN(splittedArray[i])) {
resultKey++;
resultArray[resultKey] = new Array();
resultArray[resultKey].push(splittedArray[i])
} else {
resultArray[resultKey].push(splittedArray[i])
}
}
I work this way:
//get the index where ",TestCase" is
var index = values.indexOf(",TestCase");
//create two arrays to the values
var part_one = [], part_two = [];
//slice the value from 0 to index and push part one
part_one.push(values.slice(0,index));
//slice the value from index+1 to the end and push part two
part_two.push(values.slice(index+1, values.length));
Not my favourite, but, are you after something like this?
var values = ["VItDTotal",123,234,234,2345,1234,123,435,10,"TestCase",123,234,234,2345,1234,123,435,5];
var vals = [values.
join(",").
replace(/,([a-z]+)(?!.*[a-z]+)/gi, " devider $1").
split(/\s+devider\s+/gi)];
console.log(vals);
I have an associative array - indexed by dates. Every element holds another array.
[03/16/2015: Array[3], 03/17/2015: Array[3], 03/18/2015: Array[3], 03/19/2015: Array[3]]
I created it with this code:
array[cellDate][i]=cellText;
How can I get the value for example from cell 03/16/2015 array[2] ??
var text=array['03/16/2015'][2];
With this line of code I got an error.
EDIT:
http://www.traineffective.com/schedule/
I store in that array title of blocks dropped in the schedule (title of block of 'empty' value if cell is empty)
What I want to achive is remeber the order of the blocks for particular weeks , and when user changes week with arrows it loads block based on date withdrowed from array.
Code where I create array :
function saveWeekToArray(array){
var cellDate;
var cellText;
var tmpText;
var i;
workoutsTD.each(function(){
cellDate=$(this).attr("data-day");
array[cellDate]=['','',''];
i=0;
$(this).children('.workout-cell').each(function(){
if (!$(this).hasClass('workout-cell-empty')){
cellText=$(this).find('span').text();
array[cellDate][i]=cellText;
} else {
array[cellDate][i]='empty';
}
i++
});
});
}
Code where I load data from array (One with the error )
function loadBlocksFromArray(array){
var cellDate;
var cellText;
var tmpText;
var i;
workoutsTD.each(function(){
cellDate=$(this).attr("data-day");
i=0;
$(this).children('.workout-cell').each(function(){
if ((array[cellDate][i])!='empty'){
cellText=array[cellDate][i];
$(this).append(createBlock(cellText));
$(this).removeClass('workout-cell-empty');
}
i++;
});
});
}
When you will click sumbit button in console log you will see the structure of array.
I got error while changing the week its :
enter code hereUncaught TypeError: Cannot read property '0' of undefined
In Javascript, there is no concept of an associative array. You either have arrays (which are indexed by numbers) or you have Objects (whose elements are indexed by strings).
What you instead want is an object containing all of your arrays. For example:
var data = {
'3/4/2015' : ['val1', 'val2', 'val3'],
'3/8/2015' : ['val1', 'val2', 'val3']
};
Then you can access your elements in the way that you want:
var ele = data['3/4/2015'][1];
https://jsfiddle.net/x9dnwgwc/
That is the effect what I wanted achive. Thanks for hint Harvtronix!
var jsonObj = { workout : {} }
var i;
var k;
var workoutArray = [];
for(i=1; i<=7; i++){
var newWorkout = i+ "/12/2015";
for (k=0; k<=2; k++){
var newValue = "workoutTitle" + k;
workoutArray[k]=newValue;
}
jsonObj.workout[newWorkout]=workoutArray;
}
console.log(jsonObj);
for(i=1; i<=7; i++){
var newWorkout = i+ "/12/2015";
var tmpArray= jsonObj.workout[newWorkout];
console.log(tmpArray);
}
I am working with the google sites list item.
The classes are Here and Here
I have been able to iterate through the columns and put all of the column headers in to one array with the following code.
//Global
var page = getPageByUrl(enter URL here)
var name = page.getName();
function getInfo() {
var columns = page.getColumns();
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now I want to be able to get each row of the listitem and put it in its own array.
I can add the variable
function getInfo() {
var columns = page.getColumns();
var listItems = page.getListItems();//new variable
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
}
Now that I have the variable the output is [ListItem, ListItem, ListItem, ListItem]
So I can use a .length and get a return of 4.
So now I know I have 4 rows of data so based on my wants I need 4 arrays.
Small interjection here, Not a coder by trade but code as a precursor to wants becoming needs.
A buddy of mine who is a JS coder by trade showed me this code which does work. With the logger added by me.
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
Which brings the total code to
var name = page.getName();
var listItems = page.getListItems();
var listCount = listItems.length
var listList = [];
var columns = page.getColumns();
var name = columns[0].getName();
var item, attrib = 0;
var columnList = [];
Logger.log(listItems);
Logger.log(name + " was last updated " + page.getLastUpdated());
Logger.log(name + " was last edited " + page.getLastEdited());
var listCount = 0;
//Get Column Names
for (var j in columns) {
var cName =columns[j].getName();
columnList.push(cName);
}
Logger.log(columnList);
// Get index of Due Date
var dueDateValue = columnList.indexOf("Due Date");
Logger.log("The index of due date is " + dueDateValue);
for (var i in listItems) {
if (listItems.hasOwnProperty(i)) {
item = listItems[i];
for (var x = 0; x < columnList.length; x++) {
attrib = item.getValueByName(columnList[x]);
Logger.log("Logging value of get list page get value by name = " + columnList[x] + " " + attrib);
}
}
}
}`
Forgive the above code as it has been a bit of a sketch pad trying to work this out.
I am a bit behind on understanding what is happening here
for (var i in items) { // This is for each item in the items array
if (items.hasOwnProperty(i)) {
if items is an array, how can we use has own property? Doesn't that belong to an object? Does an array become an object?
My questions are two category fold.
Category # 1
What is happening with the hasOwnProperty?
-Does the array become an object and thus can be passed to .hasOwnProperty value
Category # 2
Is this the only way to take the values from the listitem and populate an array
- If it is, is there some way to delimit so I can pass each row into it's own array
- If it isn't , why does it work with the hasOwnProperty and why doesn't it work without it in the example below
for (var i in listItems) {
for (var y = 0; y < columnList.length; y++) {
item = listItems[i];
listList = item.getValueByName(columnList[x]);
Logger.log("Logging my version of list naming " + listList);
}
In which I get a "Invalid argument: name (line 41" response. Highlighting the
listList = item.getValueByName(columnList[x]);
Not looking for a handout but I am looking to understand the hasOwnPropertyValue further.
My current understanding is that hasOwnValue has to do with prototyping ( vague understanding ) which doesn't seem to be the case in this instance
and it has to depend on a object which I described by confusion earlier.
To clarify my want:
I would like to have each row of listitems in its own array so I can compare an index value and sort by date as my current column headers are
["Project", "Start Date" , "End Date"]
Any and all help is much appreciated for this JS beginner of 2 weeks.
An array can be inside of an object as the value of a member:
{"myFirstArray":"[one,two,blue]"}
The above object has one member, a name/value pair, where the value of the member is an array.
Here is a link to a website that explains JSON.
Link To JSON.org
JSON explained by Mozilla
There are websites that will test the validity of an object:
Link to JSONLint.com
An array has elements, and elements in an array can be other arrays. So, there can be arrays inside of arrays.
.hasOwnProperty returns either true or false.
Documentation hasOwnProperty
Interestingly, I can use the hasOwnProperty method in Apps Script on an array, without an error being produced:
function testHasProp() {
var anArrayTest = [];
anArrayTest = ['one', 'two', 'blue'];
Logger.log(anArrayTest);
var whatIsTheResult = anArrayTest.hasOwnProperty('one');
Logger.log(whatIsTheResult);
Logger.log(anArrayTest);
}
The result will always be false. Using the hasOwnProperty method on an array doesn't change the array to an object, and it's an incorrect way of using Javascript which is returning false.
You could put your list values an object instead of an array. An advantage to an object is being able to reference a value by it's property name regardless of where the property is indexed. With an array, you need to know what the index number is to retrieve a specific element.
Here is a post that deals with adding properties to an object in JavaScript:
StackOverflow Link
You can either use dot notation:
objName.newProperty = 'newvalue';
or brackets
objName["newProperty"] = 'newvalue';
To add a new name/value pair (property) to an object.
I have this:
(65.94647177615738, 87.890625)(47.040182144806664, 90)(45.089035564831036, 122.34375)
I'm attempting to get the output to look like this:
"coords": [[65.94647177615738, 87.890625],[47.040182144806664, 90],[45.089035564831036, 122.34375]]
Any Idea?
The first result comes back to me as a string, so when i try to assign the first object to an array, the console shows me this:
array is: "(65.94647177615738, 87.890625)(47.040182144806664, 90)(45.089035564831036, 122.34375)"
var str = "(65.94647177615738, 87.890625)(47.040182144806664, 90)(45.089035564831036, 122.34375)";
str = str.slice(1,-1); // remove outermost parentheses
var arrCoord = str.split(')(');
for (var i=0; i<arrCoord.length; i++) {
var tarr = arrCoord[i].split(", ");
for (var j=0; j<tarr.length; j++) {
tarr[j] = parseFloat(tarr[j]);
}
arrCoord[i] = tarr;
}
// arrCoord is now populated with arrays of numbers
Decided to sort of play code golf. Assuming:
var sample = '(65.94647177615738, 87.890625)(47.040182144806664, 90)(45.089035564831036, 122.34375)';
Then:
var coords = sample
.split(/\(([^)]+)\)/)
.filter(function(v){return v!=""})
.map(function(v){return v.split(/[^0-9\.]+/)})