CODEWITHSUNDEEP
javascriptjqueryarraysnumbers
mammam
mammam

Reputation: 129

How to convert a string of numbers in array

a = ["5.0", 2.25, 3.0, "4.0"] how to get a = [5.0, 2.25, 3.0, 4.0].

I can able to get a = [5, 2.25, 3, 4]. but i need like this [5.0, 2.25, 3.0, 4.0]

can any one help me. please,

Thanks

Upvotes: 0

Views: 309

Answers (5)

Pankaj Makwana
Pankaj Makwana

Reputation: 3050

Basically Javascript does not return any value after decimal point if value is 0. You need to do it with programatically.

You can parse string with parseFloat and then you can use this function .toFixed() or .toString() so that it will give numbers with decimal point, even if 0 after decimal point.

Upvotes: 0

Mr.Pandya
Mr.Pandya

Reputation: 2038

var a = ["5.0", 2.25, 3.0, "4.0"];

a.map(function(b){
    return parseFloat(b).toFixed(1)
})

Upvotes: 0

Scott Marcus
Scott Marcus

Reputation: 65806

All numbers in JavaScript are floating point numbers, but when there is no decimal component, the runtime doesn't bother showing the decimal because, for example, 5.0 is exactly the same value as 5.

If you really want to see the numbers with this decimal, you can convert them back to strings (for display) and control the precision with the .toFixed() method, which operates on a number, but returns a string:

var a = ["5.0", 2.25, 3.0, "4.0"];

var b = a.map(Number);

b.forEach(function(num){
  console.log(num.toFixed(2));
});

Upvotes: 0

cнŝdk
cнŝdk

Reputation: 32145

Well simply map the result of Number:

var a = ["5.0", "2.25", "3.0", "4.0"];

var b = a.map(Number);
console.log(b);

Note:

You can't preserve the 0 from 5.0 in a Number, it won't be a valid number.

You can use .toFixed(1)to preserve it, but the results will be strings:

var b = a.map(function(v){
    return Number(v).toFixed(1);
});

Demo:

var a = ["5.0", "2.25", "3.0", "4.0"];

var b = a.map(function(v){
    return Number(v).toFixed(1);
});
console.log(b);

Upvotes: 2

Emil S. Jørgensen
Emil S. Jørgensen

Reputation: 6366

Map the values with a parsing call:

var a = ["5.0", 2.25, 3.0, "4.0"];
var b = a.map(function(c) {
  return parseFloat(c.toString());
});
console.log(b);

Upvotes: 0

Related Questions