(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports"], factory);
    }
})(function (require, exports) {
    /*---------------------------------------------------------------------------------------------
     *  Copyright (c) Microsoft Corporation. All rights reserved.
     *  Licensed under the MIT License. See License.txt in the project root for license information.
     *--------------------------------------------------------------------------------------------*/
    'use strict';
    Object.defineProperty(exports, "__esModule", { value: true });
    function startsWith(haystack, needle) {
        if (haystack.length < needle.length) {
            return false;
        }
        for (var i = 0; i < needle.length; i++) {
            if (haystack[i] !== needle[i]) {
                return false;
            }
        }
        return true;
    }
    exports.startsWith = startsWith;
    /**
     * Determines if haystack ends with needle.
     */
    function endsWith(haystack, needle) {
        var diff = haystack.length - needle.length;
        if (diff > 0) {
            return haystack.lastIndexOf(needle) === diff;
        }
        else if (diff === 0) {
            return haystack === needle;
        }
        else {
            return false;
        }
    }
    exports.endsWith = endsWith;
    /**
     * Computes the difference score for two strings. More similar strings have a higher score.
     * We use largest common subsequence dynamic programming approach but penalize in the end for length differences.
     * Strings that have a large length difference will get a bad default score 0.
     * Complexity - both time and space O(first.length * second.length)
     * Dynamic programming LCS computation http://en.wikipedia.org/wiki/Longest_common_subsequence_problem
     *
     * @param first a string
     * @param second a string
     */
    function difference(first, second, maxLenDelta) {
        if (maxLenDelta === void 0) { maxLenDelta = 4; }
        var lengthDifference = Math.abs(first.length - second.length);
        // We only compute score if length of the currentWord and length of entry.name are similar.
        if (lengthDifference > maxLenDelta) {
            return 0;
        }
        // Initialize LCS (largest common subsequence) matrix.
        var LCS = [];
        var zeroArray = [];
        var i, j;
        for (i = 0; i < second.length + 1; ++i) {
            zeroArray.push(0);
        }
        for (i = 0; i < first.length + 1; ++i) {
            LCS.push(zeroArray);
        }
        for (i = 1; i < first.length + 1; ++i) {
            for (j = 1; j < second.length + 1; ++j) {
                if (first[i - 1] === second[j - 1]) {
                    LCS[i][j] = LCS[i - 1][j - 1] + 1;
                }
                else {
                    LCS[i][j] = Math.max(LCS[i - 1][j], LCS[i][j - 1]);
                }
            }
        }
        return LCS[first.length][second.length] - Math.sqrt(lengthDifference);
    }
    exports.difference = difference;
    /**
     * Limit of string length.
     */
    function getLimitedString(str, ellipsis) {
        if (ellipsis === void 0) { ellipsis = true; }
        if (!str) {
            return '';
        }
        if (str.length < 140) {
            return str;
        }
        return str.slice(0, 140) + (ellipsis ? '\u2026' : '');
    }
    exports.getLimitedString = getLimitedString;
});
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