Convert javascript array to string

If value is not a plain array, such code will work fine:

var value = { "aaa": "111", "bbb": "222", "ccc": "333" };
var blkstr = [];
$.each(value, function(idx2,val2) { 
 var str = idx2 + ":" + val2;
 blkstr.push(str);
});
console.log(blkstr.join(", "));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>

(output will appear in the dev console)

As Felix mentioned, each() is just iterating the array, nothing more.

Converting From Array to String is So Easy !

var A = ['Sunday','Monday','Tuesday','Wednesday','Thursday']
array = A + ""

That's it Now A is a string. :)

You can use .toString() to join an array with a comma.

var array = ['a', 'b', 'c'];
array.toString(); // result: a,b,c

Or, set the separator with array.join('; '); // result: a; b; c.

not sure if this is what you wanted but

var arr = ["A", "B", "C"];
var arrString = arr.join(", ");

This results in the following output:

A, B, C

Four methods to convert an array to a string.

Coercing to a string

var arr = ['a', 'b', 'c'] + []; // "a,b,c"
var arr = ['a', 'b', 'c'] + ''; // "a,b,c"

Calling .toString()

var arr = ['a', 'b', 'c'].toString(); // "a,b,c"

Explicitly joining using .join()

var arr = ['a', 'b', 'c'].join(); // "a,b,c" (Defaults to ',' seperator)
var arr = ['a', 'b', 'c'].join(','); // "a,b,c"

You can use other separators, for example, ', '

var arr = ['a', 'b', 'c'].join(', '); // "a, b, c"

Using JSON.stringify()

This is cleaner, as it quotes strings inside of the array and handles nested arrays properly.

var arr = JSON.stringify(['a', 'b', 'c']); // '["a","b","c"]'

jQuery.each is just looping over the array, it doesn't do anything with the return value^∆. You are looking for jQuery.map (I also think that get() is unnecessary as you are not dealing with jQuery objects):

var blkstr = $.map(value, function(val,index) { 
 var str = index + ":" + val;
 return str;
}).join(", "); 

DEMO

But why use jQuery at all in this case? map only introduces an unnecessary function call per element.

var values = [];
for(var i = 0, l = value.length; i < l; i++) {
 values.push(i + ':' + value[i]);
}
// or if you actually have an object:
for(var id in value) {
 if(value.hasOwnProperty(id)) {
 values.push(id + ':' + value[id]);
 }
}
var blkstr = values.join(', ');

∆: It only uses the return value whether it should continue to loop over the elements or not. Returning a "falsy" value will stop the loop.

this's my function, convert object or array to json

function obj2json(_data){
 str = '{ ';
 first = true;
 $.each(_data, function(i, v) { 
 if(first != true)
 str += ",";
 else first = false;
 if ($.type(v)== 'object' )
 str += "'" + i + "':" + obj2arr(v) ;
 else if ($.type(v)== 'array')
 str += "'" + i + "':" + obj2arr(v) ;
 else{
 str += "'" + i + "':'" + v + "'";
 }
 });
 return str+= '}';
}

i just edit to v0.2 ^.^

 function obj2json(_data){
 str = (($.type(_data)== 'array')?'[ ': '{ ');
 first = true;
 $.each(_data, function(i, v) { 
 if(first != true)
 str += ",";
 else first = false;
 if ($.type(v)== 'object' )
 str += '"' + i + '":' + obj2json(v) ;
 else if ($.type(v)== 'array')
 str += '"' + i + '":' + obj2json(v) ;
 else{
 if($.type(_data)== 'array')
 str += '"' + v + '"';
 else
 str += '"' + i + '":"' + v + '"';
 }
 });
 return str+= (($.type(_data)== 'array')? ' ] ':' } ');;
}

if you want to go with plain java script

 const strArr = ['h', 'e', 'l', 'l','o'];
 const str = strArr.toString().split(",").join("");
 console.log(str);

var arr = new Array();
var blkstr = $.each([1, 2, 3], function(idx2,val2) { 
 arr.push(idx2 + ":" + val2);
 return arr;
}).join(', ');
console.log(blkstr);

OR

var arr = new Array();
$.each([1, 2, 3], function(idx2,val2) { 
 arr.push(idx2 + ":" + val2);
});
console.log(arr.join(', '));

convert an array to a GET param string that can be appended to a url could be done as follows

function encodeGet(array){
 return getParams = $.map(array , function(val,index) { 
 var str = index + "=" + escape(val);
 return str;
 }).join("&");
}

call this function as

var getStr = encodeGet({
 search: $('input[name="search"]').val(),
 location: $('input[name="location"]').val(),
 dod: $('input[name="dod"]').val(),
 type: $('input[name="type"]').val()
});
window.location = '/site/search?'+getStr;

which will forward the user to the /site/search? page with the get params outlined in the array given to encodeGet.

We can do this using following javascript methods

using join(): while we use join we can able to provide space between the itme and comma

using toString(): If we use join do don't any space between the item and comma

const array = [1,2,3,4,5]
console.log(array.join(', ')) // '1, 2, 3, 4, 5'
console.log(array.toString()) // '1,2,3,4,5'

Here's an example using underscore functions.

var exampleArray = [{name: 'moe', age: 40}, {name: 'larry', age: 50}, {name: 'curly', age: 60}];
var finalArray = _.compact(_.pluck(exampleArray,"name")).join(",");

Final output would be "moe,larry,curly"

You shouldn't confuse arrays with lists.

This is a list: {...}. It has no length or other Array properties.

This is an array: [...]. You can use array functions, methods and so, like someone suggested here: someArray.toString();

someObj.toString(); will not work on any other object types, like lists.

• javascript
• jquery
• arrays
• string