60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
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/** @module helpers */
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"use strict";
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if (!String.prototype.startsWith) {
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Object.defineProperty(String.prototype, 'startsWith', {
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enumerable: false,
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configurable: false,
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writable: false,
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value: function (searchString, position) {
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position = position || 0;
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return this.lastIndexOf(searchString, position) === position;
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}
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});
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}
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if (!String.prototype.endsWith) {
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Object.defineProperty(String.prototype, 'endsWith', {
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value: function (searchString, position) {
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var subjectString = this.toString();
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if (position === undefined || position > subjectString.length) {
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position = subjectString.length;
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}
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position -= searchString.length;
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var lastIndex = subjectString.indexOf(searchString, position);
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return lastIndex !== -1 && lastIndex === position;
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}
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});
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}
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module.exports = {
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/**
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* Split a string by a character, trim the string
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* and rejoin the string
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*
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* @param {String} char
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* @param {String} string
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* @return {String}
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*/
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splitTrim: function(char, string) {
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return string.split(char).map(String.trim).join(char);
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},
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/**
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* Determine whether an object is a string
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* @param {mixed} obj
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* @return {bool}
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*/
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isString: function(obj) {
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return (typeof obj === 'string' || obj instanceof String);
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},
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/**
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* Determine whether an object is numeric
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* @param {mixed} obj
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* @return {bool}
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*/
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isNumber: function(obj) {
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return ! isNaN(parseFloat(obj)) && isFinite(obj);
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}
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};
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