How to convert decimal OR hexadecimal value to integer?

Question

I receive a string which can be a number '42' or an hexadecimal number '0x12'. I would like to convert this to a number.

I currently have this very cumbersome function:

function str2num(str) {
    if (str.substr(0, 2) == '0x')
        return parseInt(substr(2, str), 16)
    else 
        return parseInt(str, 10)
}

Is there a shorter way to do that?

maybe read the documentation of parseInt. It can do more than you seem to know. — trincot
– trincot, Commented Jan 19, 2020 at 11:52

negin motalebi · Accepted Answer · 2020-01-19 11:45:29Z

3

If I understand properly you want convert anything to integer; so you can just use

parseInt('0x12'). It convert any type of variable to integer.

answered Jan 19, 2020 at 11:45

negin motalebi

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