Assuming you have an array in a string format, you can use the following regex to match all the decimals and then use .map(Number)
const str = "['6.35', '2.72', '11.79', '183.25']",
array = str.match(/\d+(?:\.\d+)?/g).map(Number)
console.log(array)Assuming you have an array in a string format, you can use the following regex to match all the decimals and then use .map(Number)
const str = "['6.35', '2.72', '11.79', '183.25']",
array = str.match(/\d+(?:\.\d+)?/g).map(Number)
console.log(array)\d matches only digits, it's the short for [0-9]. For example, in 6.35 \d+ matches 6 and then 35 separately and the dot is ignored. What you get in result is array containing those matches.
As suggested in other answers, use of match is redundant in your case and you can go with:
array.map(Number)
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If they're meant to be separate values, try this:
var values = "554,20".split(",")
var v1 = parseFloat(values[0])
var v2 = parseFloat(values[1])
If they're meant to be a single value (like in French, where one-half is written 0,5)
var value = parseFloat("554,20".replace(",", "."));
Have you ever tried to do this? :p
var str = '3.8';ie
alert( +(str) + 0.2 );
+(string) will cast string into float.
Handy!
So in order to solve your problem, you can do something like this:
var floatValue = +(str.replace(/,/,'.'));
There is a built-in function for this.
var a = 2;
var b = a.toFixed(1);
This rounds the number to one decimal place, and displays it with that one decimal place, even if it's zero.
If you want to append .0 to output from a Number to String conversion and keep precision for non-integers, just test for an integer and treat it specially.
function toNumberString(num) {
if (Number.isInteger(num)) {
return num + ".0"
} else {
return num.toString();
}
}
Input Output
3 "3.0"
3.4567 "3.4567"
It's easy. You just have to convert the num var into an string (with the .toString() method) and then .split('') it (the '' parameter makes it split every character).
var num = 25.67;
var str_array = num.toString().split('');
You can also use this code:
var num = 25.67;
var str_array = num.toString();
Then str_array will be no more an array, but a string (which can be treated as an array)
Try with
var digits = num.toString().split('');
I can't use parseFloat(). I am so far doing the obvious by checking each character, but I feel there has to be a more elegant way! My function needs to act exactly the same as parseFloat() does. Can anyone help?