Develop Reference

JavaScript: Issue with single quotes and URL

I have the following JS coding:
var myVariable = "material'"; //<- there is a single quote before the double quote!
var object = {
path: "/Data(Material='" + myVariable + "')"
}
object.path is building a URL for a service call and will result in this:
https://myurl/Data(Material='material'')
Of course this service call will fail because of the two single quotes.
What else can I do?

I think this should take care of it. Just replace all single quotes in your variable for two single quotes:
var object = {
path: "/Data(Material='" + myVariable.replace(/'/g, "''") + "')"
}

Adding the single string quote for value inside variable using Javascript

I have a variable, before I use that variable,I need to add string quotes to the value/data which is inside the variable using JavaScript need help
//i am getting like this //
var variable=king;
//i want to convert it with single quote//
variable=variable;
but i need the data inside variable should be in a single quotation.

You can concatenate the variable with your quotes like :
function addQuotes(value){
var quotedVar = "\'" + value + "\'";
return quotedVar;
}
And use it like :
var king = addQuotes('king');
console.log will display :
'king'
Edit : you can try it in the chrome/firefox console, I did it and it works perfectly when copy/paste from here.

var x = 'abc';
var sData = "\'" + x +"\'";
// sData will print "'abc'"

var x = 'pqr';
var sData = "\'" + x +"\'";
// sData will print "'abc'"

1) You can use doublequotes
var variable = "'" + variable + "'";
2) ... or You can escape single quote symbol with backslash
var variable = '\'' + variable + '\'';

Javascript - combine variables to form path

I need to combine two variables and one static string to form a path to may image - see below. Please advise on how to correct the syntax:
var shortUrl = "http://www.art.com";
album_name = "art";
poster:""+shortUrl+""/""+album_name+"".jpg",
I am trying to get it to output:
http://www.art.com/art.jpg

You almost had it.
shortUrl + "/" + album_name + ".jpg";
You don't need to escape slashes when they are inside a string literal.

You should use var to prevent the variables from becoming global, assign the result to poster with an =, remove the opening "", and only use one " on either side of a string.
var shortUrl = "http://www.art.com";
var album_name = "art";
var poster = shortUrl +"/" + album_name + ".jpg";
console.log(poster);

append single quotes to characters

I have a string like
var test = "1,2,3,4";
I need to append single quotes (' ') to all characters of this string like this:
var NewString = " '1','2','3','4' ";
Please give me any suggestion.

First, I would split the string into an array, which then makes it easier to manipulate into any form you want. Then, you can glue it back together again with whatever glue you want (in this case ','). The only remaining thing to do is ensure that it starts and ends correctly (in this case with an ').
var test = "1,2,3,4";
var formatted = "'" + test.split(',').join("','") + "'"

var newString = test.replace(/(\d)/g, "'$1'");
JS Fiddle demo (please open your JavaScript/developer console to see the output).
For multiple-digits:
var newString = test.replace(/(\d+)/g, "'$1'");
JS Fiddle demo.
References:
Regular expressions (at the Mozilla Developer Network).

Even simpler
test = test.replace(/\b/g, "'");

A short and specific solution:
"1,2,3,4".replace(/(\d+)/g, "'$1'")
A more complete solution which quotes any element and also handles space around the separator:
"1,2,3,4".split(/\s*,\s*/).map(function (x) { return "'" + x + "'"; }).join(",")

Using regex:
var NewString = test.replace(/(\d+)/g, "'$1'");

A string is actually like an array, so you can do something like this:
var test = "1,2,3,4";
var testOut = "";
for(var i; i<test.length; i++){
testOut += "'" + test[i] + "'";
}
That's of course answering your question quite literally by appending to each and every character (including any commas etc.).
If you needed to keep the commas, just use test.split(',') beforehand and add it after.
(Further explanation upon request if that's not clear).

Put quotes around a variable string in JavaScript

I have a JavaScript variable:
var text = "http://example.com"
Text can be multiple links. How can I put '' around the variable string?
I want the strings to, for example, look like this:
"'http://example.com'"

var text = "\"http://example.com\"";
Whatever your text, to wrap it with ", you need to put them and escape inner ones with \. Above will result in:
"http://example.com"

var text = "http://example.com";
text = "'"+text+"'";
Would attach the single quotes (') to the front and the back of the string.

I think, the best and easy way for you, to put value inside quotes is:
JSON.stringify(variable or value)

You can add these single quotes with template literals:
var text = "http://example.com"
var quoteText = `'${text}'`
console.log(quoteText)
Docs are here. Browsers that support template literals listed here.

Try:
var text = "'" + "http://example.com" + "'";

To represent the text below in JavaScript:
"'http://example.com'"
Use:
"\"'http://example.com'\""
Or:
'"\'http://example.com\'"'
Note that: We always need to escape the quote that we are surrounding the string with using \
JS Fiddle: http://jsfiddle.net/efcwG/
General Pointers:
You can use quotes inside a string, as long as they don't match the
quotes surrounding the string:
Example
var answer="It's alright";
var answer="He is called 'Johnny'";
var answer='He is called "Johnny"';
Or you can put quotes inside a string by using the \ escape
character:
Example
var answer='It\'s alright';
var answer="He is called \"Johnny\"";
Or you can use a combination of both as shown on top.
http://www.w3schools.com/js/js_obj_string.asp

let's think urls = "http://example1.com http://example2.com"
function somefunction(urls){
var urlarray = urls.split(" ");
var text = "\"'" + urlarray[0] + "'\"";
}
output will be text = "'http://example1.com'"

In case of array like
result = [ '2015', '2014', '2013', '2011' ],
it gets tricky if you are using escape sequence like:
result = [ \'2015\', \'2014\', \'2013\', \'2011\' ].
Instead, good way to do it is to wrap the array with single quotes as follows:
result = "'"+result+"'";

You can escape " with \
var text="\"word\"";
http://jsfiddle.net/beKpE/

Lets assume you have a bunch of urls separated by spaces. In this case, you could do this:
function quote(text) {
var urls = text.split(/ /)
for (var i = 0; i < urls.length; i++) urls[i] = "'" + urls[i] + "'"
return urls.join(" ")
}
This function takes a string like "http://example.com http://blarg.test" and returns a string like "'http://example.com' 'http://blarg.test'".
It works very simply: it takes your string of urls, splits it by spaces, surrounds each resulting url with quotes and finally combines all of them back with spaces.

var text = "\"http://www.example1.com\"; \"http://www.example2.com\"";
Using escape sequence of " (quote), you can achieve this
You can place singe quote (') inside double quotes without any issues
Like this
var text = "'http://www.ex.com';'http://www.ex2.com'"

Another easy way to wrap a string is to extend the Javascript String prototype:
String.prototype.quote = function() { return "\"" + this + "\""; };
Use it like this:
var s = "abc";
console.log( "unwrapped: " + s + ", wrapped: " + s.quote() );
and you will see:
unwrapped: abc, wrapped: "abc"

This can be one of several solutions:
var text = "http://example.com";
JSON.stringify(text).replace('\"', '\"\'').replace(/.$/, '\'"')