I want to print a string in following manner 'abc',21,'email' in javascript how can I do. below is my code.
var data = [];
data.push('abc');
data.push(21);
data.push('email');
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3 Answers
Write a function to quote a string:
function quote(s) {
return typeof s === 'string' ? "'"+s+"'" : s;
}
Now map your array and paste the elements together with a comma:
data . map(quote) . join(',')
Since joining with a comma is the default way to convert an array into a string, you might be able to get away without the join in some situations:
alert (data . map(quote));
since alert converts its parameter into a string. Same with
element.textContent = data . map(quote);
Comments
if data is an array defined as
var data = [];
data.push('abc');
data.push(21);
data.push('email');
the use join() method of array to join (concatenate) the values by specifying the separator
try
alert( "'" + data.join("','") + "'" );
or
console.log( "'" + data.join("','") + "'" );
or simply
var value = "'" + data.join("','") + "'" ;
document.body.innerHTML += value;
2 Comments
gurvinder372
@torazaburo yes it will, my bad, i missed this specific detail.
Now data = ['abc', 21, 'email'];
So we can use forEach function
var myString = '';
data.forEach(function(value, index){
myString += typeof value === 'string' ? "'" + value + "'" : value;
if(index < data.length - 1) myString += ', ';
});
console.log(myString)
Shorter version:
myString = data.map(function(value){
return typeof value === 'string' ? "'" + value + "'" : value;
}).join(', ');
console.log(myString);
JSFiddle: https://jsfiddle.net/LeoAref/ea5fa3de/
8 Comments
Muhammad Hamada
That's interesting to know why I got a negative?!
Muhammad Hamada
Ok now I use
forEach, by the way, 'forEach` is more convenient, but both are the same!!!Well, some people downvote answers if they're wrong. Anyway, you were actually on the right track with the use of
reduce as you were doing before the edit. Instead of you having to declare your own variable (myString), reduce maintains this variable internally, passing it to the callback on each iteration of the loop as the first parameter, what you were calling prv. |