Bug 44040 – Split with regex including an alternative | incorrectly returns splitting tokens

• Status: RESOLVED
• Resolution: INVALID
• Component: JavaScriptCore

[Guillaume Bodi]

Splitting a string with a regex including a choice point (such as (a|b) ) will cause the splitting tokens to be part of the resulting array.

Test case:
var string = "'test1' and 'test2' or 'test3'";
alert(string.split(/(and|or)/));

Actual result:
["'test1 ", "and", " 'test2' ", "or", " 'test3'"]

Expected result:

["'test1 ", " 'test2' ", " 'test3'"]

[Guillaume Bodi]

Correction to the results sample (missing single quote after test1):

Actual result:
["'test1' ", "and", " 'test2' ", "or", " 'test3'"]

Expected result:

["'test1' ", " 'test2' ", " 'test3'"]

[Guillaume Bodi]

Correct behavior as per the ECMAScriptv5 specs section 15.5.4.14

Sorry for the noise.