split + regex

[אהרן]

מדוע

var text = 'abababab';
text.split(/(a)/g )‏
=
["b", "a", "b", "a", "b", "a", "b", "a", "b"]

לעומת

var text = 'abababab';
text.split(/a/g )‏
=
["b", "b", "b", "b", "b"]

[yossiz]

כתוב פה:

If separator is a regular expression that contains capturing parentheses, then each time separator is matched, the results (including any undefined results) of the capturing parentheses are spliced into the output array.

[dovid]

אגב, הדגל g לא משנה כלום במקרה של split, בכל מקרה הוא עובר על כל ההתאמות עד סוף המחרוזת.