[GROOVY-1290] Provides a sensible default value for join()

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0-JSR-5
• Fix Version/s: 1.0-JSR-6
• Component/s: groovy-jdk
• Assignee: Ryan Harris
• Reporter: Denis N. Antonioli
• Created: 06/Apr/06 05:34
• Updated: 06/Apr/06 05:43
• Resolved: 06/Apr/06 05:43

Description

the GDK methode join() on arrays is defined as join(java.lang.String separator):
assert ['a', 'b'].join('-') == 'a-b'

If the separator is missing, groovy doesn't fail (good!), but it sets the separator to null.
assert ['a', 'b'].join() == 'anullb'

A sensible default should be provided, either an empty string (as in ruby), or a single blank, so that:
assert ['a', 'b'].join() != 'anullb'
assert ['a', 'b'].join() == 'ab' /* ruby-like */
assert ['a', 'b'].join() == 'a b' /* own-convention */