Regular Expression for removing numbers

Question

can anyone please tell me how to remove the last numbers before the space using Regular Expression in javascript

ABCD 154 => ABCD  
ACR 15 => ACR   
SA 12S 8945 => SA 12S  

Answer 1

Use the end of string $ anchor to replace the preceding space and numbers that follow at the end of the string.

str = str.replace(/ [0-9]+$/, '');

If you want to retain the space character, just remove it from the regular expression.

Working Demo

Answer 2

尝试

'SA 12S 8945'.replace(/\s\d+$/, '')