Wish for StringUtils.join(Collection, *)
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Key: LANG-266
URL: http://issues.apache.org/jira/browse/LANG-266
Project: Commons Lang
Type: Wish
Versions: Nightly Builds
Reporter: Stepan Koltsov
Priority: Trivial
There is a lack of StringUtils.join(Collection, String) method in commons-lang.
Could you please add it?
Commons-lang has method join(Iterator, String), however join(Collection,
String) is still useful. Join is used very often, and in most situations it is
used with Collection, not with Iterator, because almost all methods return
Collections, not Iterators and a lot of data is stored as Collections, not as
Iterators. The string ".iterator()" has 11 characters while line for code is
only 72 chars. I've found that in my code there are several methods that could
be one line shorter if it was StringUtils.join(Collection, String). Compare:
// with StringUtils.join(Collection, String)
return "UNIQUE (" + StringUtils.join(unique.getColumnNames(), ", ") + ")";
against:
// without
Iterator columnNames = unique.getColumnNames().iterator();
return "UNIQUE (" + StringUtils.join(columnNames, ", ") + ")";
Motivation is almost same as "Why we have StringUtils.join(Object[], String)
while we could write StringUtils.join(Arrays.asList(array).iterator(),
separator)?"
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