prototyper.json

{
    "patterns": [
        {
            "pattern_name": "varname:iterations",
            "pattern_regex": "(\\S+):(\\w+)",
            "lines": [
                "for (var {0} = 0; {0} < {1}; {0} += 1) {",
                "{indent}{0};",
                "}"
            ]
        },
        {
            "pattern_name": "varname:iterable",
            "pattern_regex": "(\\S+):(\\w+)\\[\\]?",
            "lines": [
                "for (var {0} = 0; {0} < {1}.length; {0} += 1) {",
                "{indent}{1}[{0}];",
                "}"
            ]
        }
    ]
}