JavaScript - opposite of toString()?

Question

When used with numbers, the toString() method converts a number into a string representation using the base numbering system specified by the optional radix.

For instance the number 8 and toString(2) would return "1000".

Is there a method to achieve the opposite? I.e., convert the string "1000" back into the number 8?

Answer 1

parseInt() takes a radix as its second argument, so you can do parseInt("1000", 2) to get what you want.

Answer 2

You can use parseInt using a raidx 2. i.e

parseInt("1000", 2) will return 8

Answer 3

Check the parseInt() Javascript function: http://www.w3schools.com/jsref/jsref_parseInt.asp