Not able to convert string to float

Question

I have a simple array of string but I am trying to convert it to array of decimal numbers like [5.22,8.22,rest of the numbers], but it is returning only array of whole numbers.

I am doing some rookie mistake which I am not able to notice

let k = ["5:17", "8:22", "3:34", "5:23",
         "7:12", "7:24", "6:46", "4:45",
         "4:40", "7:58", "11:51", "9:13",
         "5:50", "5:52", "5:49", "8:57",
         "11:29", "3:07", "5:59", "3:31"];

let arrOfNum = k.reduce(function(acc, crr) {
  acc.push(parseFloat(crr))
  return acc;
}, [])

console.log(arrOfNum)

Andrew · Accepted Answer · 2018-10-20 14:56:29Z

4

Change acc.push(parseFloat(crr)) to acc.push(parseFloat(crr.replace(":",".")))

JavaScript doesn't recognize colons as periods

answered Oct 20, 2018 at 14:56

Andrew

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Comments

Ele · Accepted Answer · 2018-10-20 15:01:32Z

1

A float number doesn't follow this format integer:decimal,

it follows `integer.decimal`
                   ^
                   |
                   +--- the dot is the decimal separator in JS.

On the other hand, you don't need reduce for doing that, use the function map instead.

Likewise, I recommend you to use the object Number. If you want, you can read a little about it here

let k = ["5:17", "8:22", "3:34", "5:23","7:12", "7:24", "6:46", "4:45","4:40", "7:58", "11:51", "9:13","5:50", "5:52", "5:49", "8:57","11:29", "3:07", "5:59", "3:31"],
    arrOfNum = k.map((crr) => Number(crr.replace(':', '.')));

console.log(arrOfNum);

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answered Oct 20, 2018 at 15:01

Ele

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