Develop Reference

How to parse number with points and commas

I recieve an string like;
1.234.567,89
I want 1234567.89
Comma is decimal delimiter.Point is thousands, and millions delimiter
I want to treat as a number.
I try replaces, but only works with first ".". And parseFloat.
Also I try some regex that found here,but doesn't work for me
I want this;
var numberAsString= '1.234.567,89';
//Step to clean string and conver to a number to compare (numberAsString => numberCleaned)
if (numberCleaned> 1000000) {alert("greater than 1 million");}
Any Idea?
(Sorry if its a newbie question, but I dont found any solution in hours...)

You can use replace with g
const val = '1.234.567,89'.replace(/\./gi, '').replace(/,/, '.');
console.log(val)
console.log(typeof parseFloat(val))

this should work for the current scenario.
1st remove the dots then replace the comma with dot.
let number = "1.234.567,89";
function parseNum(num){
return num.replace(/\./g, '').replace(",", ".")
}
console.log(parseNum(number));

JavaScript conversion from String with "," to Int

How to convert 1,000 to 1000 using JavaScript.
console.log(parseInt(1,000));
is taking it as 1

You should replace the "," and then doo the parseInt
parseInt("1,000".replace(/,/g,""));

You need to replace comma with empty character. Something like this below:
parseInt("1,000".replace(/,/g, ""))

Try this,
var num = parseInt("1,000".replace(/\,/g, ''), 10);
As, we need to remove "comma" from the string.
We also need "10" as radix as the second parameter.
Thanks

You can use a regular expression to replace all non-digits except for - and . when passing the argument to parseInt:
function parseMyInt(str) {
return parseInt(str.replace(/[^-\.\d]/g,''));
}
console.log(parseMyInt("1,000"));
console.log(parseMyInt("1,000,000"));
console.log(parseMyInt("1,000.1234"));
console.log(parseMyInt("-1,000"));
Edit
Expanded the regex to account for negative numbers and decimals.

`parseInt` is not working as expected when special characters exists

i have var value="10+10" when i try to convert this using parseInt(value) to an int it is giving me NaN. Is their any option to convert a string if it has special characters in it?
The Result shoud be 20 or simply 10+10

you can use eval to evaluate string operations.
since parseInt doesn't recognize characters like + it will return the numbers until special characters.
as a example
(parseInt("10+10") print 10 and
(parseInt("100+10") print 100 and
console.log(parseInt("10+10"))
console.log(parseInt("100+10"))
console.log(eval("10+10"))
console.log(eval("10*10"))

parseInt on (class=) "h310" renders NaN

I've an element like so
<span class='h310'>blah</span>
Now
console.log($(this).attr('class'));
renders
"h310"
but
console.log(parseInt($(this).attr('class')));
renders NaN instead of the very much needed 310.
What am I missing here and how to solve this?
UPDATE
The h is indeed static, I merely added it because "310" is not a valid class name according to the HTML spec while "h310" is.

The h is static
In that case you can simply replace the "h" and convert the string to a number using the unary plus:
+$(this).attr('class').replace('h', '');
> 310
JSFiddle demo.

You need to extract the number part of the string first. parseInt will only extract it automatically if there is no non-numeric character at the beginning of the string
var numberpart = $(this).attr('class').substring(1);
console.log(parseInt(numberpart, 10)); // make sure to provide the radix 10 for decimal numbers

parseInt method will not work here as the class contains the character "h".
Try this (with "h" is static)
<span id="sp1" class='h310'>blah</span>
$(document).ready(function(){
alert($('#sp1').attr('class'));
alert(parseInt($('#sp1').attr('class').replace('h', ''),10));
});
For a general solutions use regex.
console.log(parseInt($('#sp1').attr('class').match(/\d+/),10));
Live DEMO

Yes, obviously it returns NaN as parseInt method won't work for last number from string but if you have 310h then it could be parsed with parseInt:
So, use regular expression here:
console.log(parseInt($('span').attr('class').match(/\d+/),10));
working fiddle
As #James you can also use like this:
$(this).attr('class').replace(/[a-zA-Z ]/g, '');

Try this
var str= $('span').attr('class');
var thenum = str.replace( /^\D+/g, '');
console.log(thenum)
DEMO

What is the most efficient way to filter numbers and parentheses in JavaScript?

I want to filter the number and parentheses out of the following string:
firstText secondText probablyMoreTextToComeWithSpacesBetweenThem (0000)
I want the output to be:
firstText secondText probablyMoreTextToComeWithSpacesAndNumbersBetweenThem
What is the fastest and most efficient way to do this in JavaScript? Thanks.
UPDATE: I want only the numbers between the parentheses to go away and not any other number.

Based on your input, this regex could work:
return input.replace(/\s*\(\d+\)/g, "");
It replaces all parenthesized integers, including all whitespaces before, with an empty string. To remove just all brackets and digits from your string, use
return input.replace(/[()\d]/g, "");

Use replace()
var s = "firstText secondText probablyMoreTextToComeWithSpacesBetweenThem (0000)";
s = s.replace(/\(\d*\)/g, "");