ltsv.js

/*jslint devel:true */
/*global window, exports */
(function (root) {
    "use strict";

    // Prototype extension
    if (!Array.prototype.removeAt) {
        Array.prototype.removeAt = function (idx) {
            if (typeof idx !== "number") {
                throw new TypeError("removeAt argument is required Integer");
            }
            var el = this[idx];
            if (el) {
                this.splice(idx, 1);
            }
            return el;
        };
    }
    if (!Object.keys) {
        Object.keys = function (obj) {
            if ((typeof obj !== "object" && typeof obj !== "function") || obj === null) {
                throw new TypeError("Object.keys called on a non-object");
            }
            var key, keys = [];
            for (key in obj) {
                if (Object.prototype.hasOwnProperty.call(obj, key)) {
                    keys.push(key);
                }
            }
            return keys;
        };
    }

    /**
     * Parse LTSV
     * @param  {String} str LTSV format string
     * @return {Object} Parsed object
     */
    function parseLTSV(str) {
        // Variables
        var ret, kva, kvi, i, l, chunks, name;
        // Initialize
        ret = {};
        kva = str.replace(/(^[\s　]+)|([\s　]+$)/g, "").split("\t");
        // Convert
        for (i = 0, l = kva.length; i < l; i += 1) {
            kvi = kva[i];
            chunks = kvi.split(":");
            name = chunks.removeAt(0);
            ret[name] = chunks.join(":");
        }
        return ret;
    }

    /**
     * Dump LTSV
     * @param  {Object} obj Dump object
     * @return {String}     Dumped string
     */
    function dumpLTSV(obj) {
        // Variables
        var keys, i, l, result, label;
        // Initialize
        keys = Object.keys(obj);
        // Mapping
        for (i = 0, l = keys.length, result = []; i < l; i += 1) {
            label = keys[i];
            result.push(label + ":" + obj[label]);
        }
        return result.join("\t");
    }

    if (typeof exports !== "undefined") {
        exports.LTSV = {
            parse: parseLTSV,
            dump: dumpLTSV
        };
    } else {
        root.LTSV = {
            parse: parseLTSV,
            dump: dumpLTSV
        };
    }
}(this));