Javascript - Remove or replace spaces from a string

remove-replace-spaces.js

/**
 * Remove spaces from a string.
 * 
 * Info: http://stackoverflow.com/questions/5963182/how-to-remove-spaces-from-a-string-using-javascript
 */
str = str.replace(/\s+/g, '');

/**
 * In the first regex, each space character is being replaced, character by character, with the empty string.
 * In the second regex, each contiguous string of space characters is being replaced with the empty string because of the +.
 * 
 * Info: http://stackoverflow.com/questions/5964373/is-there-a-difference-between-s-g-and-s-g
 */
'  A B  C   D EF '.replace(/\s/g, '#') // ##A#B##C###D#EF#

'  A B  C   D EF '.replace(/\s+/g, '#') // #A#B#C#D#EF#