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---
layout: default
class: Macro
title: filter ';' LIST ';' REGEX
summary: Filters entries in a list that matching a regular expression
---
public String _filter(String args[]) {
return filter(args, false);
}
public String _filterout(String args[]) {
return filter(args, true);
}
static String _filterHelp = "${ % s;<list>;<regex>}";
String filter(String[] args, boolean include) {
verifyCommand(args, String.format(_filterHelp, args[0]), null, 3, 3);
Collection<String> list = new ArrayList<String>(Processor.split(args[1]));
Pattern pattern = Pattern.compile(args[2]);
for (Iterator<String> i = list.iterator(); i.hasNext();) {
if (pattern.matcher(i.next()).matches() == include)
i.remove();
}
return Processor.join(list);
}
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