Convert array of strings to array of numbers Jquery

Question

I have a couple of arrays of numbers that are in string format, like:

A = ["1046.7779999999038", "1106.244999999035", "833.5839999999735"]

I want to use the numbers in number format further for some calculations and need them in numeric format, so that I have an array of numbers.

I wanted to use parseInt, but this is not quite right it seems. Maybe I need to split my array first? Ideally I want a function that has an array as input and converts it to the same array in numeric format.

Can somebody help me with this?

Guffa · Accepted Answer · 2014-11-20 00:05:34Z

3

You use the parseFloat function for parsing floating point numbers.

You can use the map method to parse all of the strings in the array into an array of numbers:

A = $.map(A, function(s){ return parseFloat(s); });

answered Nov 20, 2014 at 0:05

Guffa

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6 Comments

jfriend00 Over a year ago

.each() seems more appropriate here since you can just assign to the existing array rather than create a whole new array.

Guffa Over a year ago

@jfriend00: If you want to do that then a plain loop would be more appropriate. You can't assign the parsed values back to the value that you get in the each callback, so you have to access the array by index anyway.

jfriend00 Over a year ago

.each() or for are both fine and better than $.map() IMO.

Guffa Over a year ago

@jfriend00: This kind of conversion is exactly what the map method is intended for, it's up to you if you don't want to use it.

Guffa Over a year ago

@jfriend00: Why do you say that it doesn't do a conversion when it clearly does a conversion? I think that you are utterly confused...

|

Rodney G · Accepted Answer · 2014-11-20 00:05:24Z

2

You can call parseFloat() on each member of the array.

answered Nov 20, 2014 at 0:05

Rodney G

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Comments

markt · Accepted Answer · 2014-11-20 00:12:44Z

1

Use parseFloat:

function convert(arr){
    var ret=[];
    for(i in arr){
    ret.push (parseFloat(I));
    }
    return ret;
}

answered Nov 20, 2014 at 0:12

markt

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Comments

jfriend00 · Accepted Answer · 2014-11-20 00:39:37Z

0

As others have said, parseFloat() is the conversion function you want to use. To convert your array in place without creating a new temporary array, you can either use a for loop or the .forEach() iterator to cycle through the array and convert the elements in place:

for (var i = 0; i < A.length; i++) {
    A[i] = parseFloat(A[i]);
}

or

A.forEach(function(value, index) {
    A[index] = parseFloat(value);
});

answered Nov 20, 2014 at 0:39

jfriend00

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Comments

saruftw · Accepted Answer · 2014-11-20 00:06:54Z

0

Let a separate array B store all your number conversions.

var convert = function() {
    for(var i=0;i<A.length< i++){
        B[i]=Number(A[i]);
    }
  }

answered Nov 20, 2014 at 0:06

saruftw

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Comments

guest271314 · Accepted Answer · 2014-11-20 00:39:02Z

0

Try

$.each(A, function(i, el) {
  A[i] = Number(el)
});

var A = ["1046.7779999999038", "1106.244999999035", "833.5839999999735"];

$.each(A, function(i, el) {
  A[i] = Number(el)
});

console.log(typeof (A[0] && A[1] && A[2]) === "number", A)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

answered Nov 20, 2014 at 0:39

guest271314

1

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