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					348 lines
				
				8.3 KiB
			
		
		
			
		
	
	
					348 lines
				
				8.3 KiB
			| 
											3 years ago
										 | /** | ||
|  |  * lodash (Custom Build) <https://lodash.com/>
 | ||
|  |  * Build: `lodash modularize exports="npm" -o ./` | ||
|  |  * Copyright jQuery Foundation and other contributors <https://jquery.org/>
 | ||
|  |  * Released under MIT license <https://lodash.com/license>
 | ||
|  |  * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 | ||
|  |  * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors | ||
|  |  */ | ||
|  | 
 | ||
|  | /** Used as references for various `Number` constants. */ | ||
|  | var INFINITY = 1 / 0, | ||
|  |     MAX_INTEGER = 1.7976931348623157e+308, | ||
|  |     NAN = 0 / 0; | ||
|  | 
 | ||
|  | /** `Object#toString` result references. */ | ||
|  | var symbolTag = '[object Symbol]'; | ||
|  | 
 | ||
|  | /** Used to match leading and trailing whitespace. */ | ||
|  | var reTrim = /^\s+|\s+$/g; | ||
|  | 
 | ||
|  | /** Used to detect bad signed hexadecimal string values. */ | ||
|  | var reIsBadHex = /^[-+]0x[0-9a-f]+$/i; | ||
|  | 
 | ||
|  | /** Used to detect binary string values. */ | ||
|  | var reIsBinary = /^0b[01]+$/i; | ||
|  | 
 | ||
|  | /** Used to detect octal string values. */ | ||
|  | var reIsOctal = /^0o[0-7]+$/i; | ||
|  | 
 | ||
|  | /** Built-in method references without a dependency on `root`. */ | ||
|  | var freeParseInt = parseInt; | ||
|  | 
 | ||
|  | /** Detect free variable `global` from Node.js. */ | ||
|  | var freeGlobal = typeof global == 'object' && global && global.Object === Object && global; | ||
|  | 
 | ||
|  | /** Detect free variable `self`. */ | ||
|  | var freeSelf = typeof self == 'object' && self && self.Object === Object && self; | ||
|  | 
 | ||
|  | /** Used as a reference to the global object. */ | ||
|  | var root = freeGlobal || freeSelf || Function('return this')(); | ||
|  | 
 | ||
|  | /** Used for built-in method references. */ | ||
|  | var objectProto = Object.prototype; | ||
|  | 
 | ||
|  | /** | ||
|  |  * Used to resolve the | ||
|  |  * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 | ||
|  |  * of values. | ||
|  |  */ | ||
|  | var objectToString = objectProto.toString; | ||
|  | 
 | ||
|  | /** Built-in value references. */ | ||
|  | var Symbol = root.Symbol; | ||
|  | 
 | ||
|  | /** Used to convert symbols to primitives and strings. */ | ||
|  | var symbolProto = Symbol ? Symbol.prototype : undefined, | ||
|  |     symbolToString = symbolProto ? symbolProto.toString : undefined; | ||
|  | 
 | ||
|  | /** | ||
|  |  * The base implementation of `_.clamp` which doesn't coerce arguments. | ||
|  |  * | ||
|  |  * @private | ||
|  |  * @param {number} number The number to clamp. | ||
|  |  * @param {number} [lower] The lower bound. | ||
|  |  * @param {number} upper The upper bound. | ||
|  |  * @returns {number} Returns the clamped number. | ||
|  |  */ | ||
|  | function baseClamp(number, lower, upper) { | ||
|  |   if (number === number) { | ||
|  |     if (upper !== undefined) { | ||
|  |       number = number <= upper ? number : upper; | ||
|  |     } | ||
|  |     if (lower !== undefined) { | ||
|  |       number = number >= lower ? number : lower; | ||
|  |     } | ||
|  |   } | ||
|  |   return number; | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * The base implementation of `_.toString` which doesn't convert nullish | ||
|  |  * values to empty strings. | ||
|  |  * | ||
|  |  * @private | ||
|  |  * @param {*} value The value to process. | ||
|  |  * @returns {string} Returns the string. | ||
|  |  */ | ||
|  | function baseToString(value) { | ||
|  |   // Exit early for strings to avoid a performance hit in some environments.
 | ||
|  |   if (typeof value == 'string') { | ||
|  |     return value; | ||
|  |   } | ||
|  |   if (isSymbol(value)) { | ||
|  |     return symbolToString ? symbolToString.call(value) : ''; | ||
|  |   } | ||
|  |   var result = (value + ''); | ||
|  |   return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Checks if `value` is the | ||
|  |  * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 | ||
|  |  * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 0.1.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to check. | ||
|  |  * @returns {boolean} Returns `true` if `value` is an object, else `false`. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.isObject({}); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isObject([1, 2, 3]); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isObject(_.noop); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isObject(null); | ||
|  |  * // => false
 | ||
|  |  */ | ||
|  | function isObject(value) { | ||
|  |   var type = typeof value; | ||
|  |   return !!value && (type == 'object' || type == 'function'); | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Checks if `value` is object-like. A value is object-like if it's not `null` | ||
|  |  * and has a `typeof` result of "object". | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.0.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to check. | ||
|  |  * @returns {boolean} Returns `true` if `value` is object-like, else `false`. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.isObjectLike({}); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isObjectLike([1, 2, 3]); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isObjectLike(_.noop); | ||
|  |  * // => false
 | ||
|  |  * | ||
|  |  * _.isObjectLike(null); | ||
|  |  * // => false
 | ||
|  |  */ | ||
|  | function isObjectLike(value) { | ||
|  |   return !!value && typeof value == 'object'; | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Checks if `value` is classified as a `Symbol` primitive or object. | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.0.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to check. | ||
|  |  * @returns {boolean} Returns `true` if `value` is a symbol, else `false`. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.isSymbol(Symbol.iterator); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.isSymbol('abc'); | ||
|  |  * // => false
 | ||
|  |  */ | ||
|  | function isSymbol(value) { | ||
|  |   return typeof value == 'symbol' || | ||
|  |     (isObjectLike(value) && objectToString.call(value) == symbolTag); | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Converts `value` to a finite number. | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.12.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to convert. | ||
|  |  * @returns {number} Returns the converted number. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.toFinite(3.2); | ||
|  |  * // => 3.2
 | ||
|  |  * | ||
|  |  * _.toFinite(Number.MIN_VALUE); | ||
|  |  * // => 5e-324
 | ||
|  |  * | ||
|  |  * _.toFinite(Infinity); | ||
|  |  * // => 1.7976931348623157e+308
 | ||
|  |  * | ||
|  |  * _.toFinite('3.2'); | ||
|  |  * // => 3.2
 | ||
|  |  */ | ||
|  | function toFinite(value) { | ||
|  |   if (!value) { | ||
|  |     return value === 0 ? value : 0; | ||
|  |   } | ||
|  |   value = toNumber(value); | ||
|  |   if (value === INFINITY || value === -INFINITY) { | ||
|  |     var sign = (value < 0 ? -1 : 1); | ||
|  |     return sign * MAX_INTEGER; | ||
|  |   } | ||
|  |   return value === value ? value : 0; | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Converts `value` to an integer. | ||
|  |  * | ||
|  |  * **Note:** This method is loosely based on | ||
|  |  * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
 | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.0.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to convert. | ||
|  |  * @returns {number} Returns the converted integer. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.toInteger(3.2); | ||
|  |  * // => 3
 | ||
|  |  * | ||
|  |  * _.toInteger(Number.MIN_VALUE); | ||
|  |  * // => 0
 | ||
|  |  * | ||
|  |  * _.toInteger(Infinity); | ||
|  |  * // => 1.7976931348623157e+308
 | ||
|  |  * | ||
|  |  * _.toInteger('3.2'); | ||
|  |  * // => 3
 | ||
|  |  */ | ||
|  | function toInteger(value) { | ||
|  |   var result = toFinite(value), | ||
|  |       remainder = result % 1; | ||
|  | 
 | ||
|  |   return result === result ? (remainder ? result - remainder : result) : 0; | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Converts `value` to a number. | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.0.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to process. | ||
|  |  * @returns {number} Returns the number. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.toNumber(3.2); | ||
|  |  * // => 3.2
 | ||
|  |  * | ||
|  |  * _.toNumber(Number.MIN_VALUE); | ||
|  |  * // => 5e-324
 | ||
|  |  * | ||
|  |  * _.toNumber(Infinity); | ||
|  |  * // => Infinity
 | ||
|  |  * | ||
|  |  * _.toNumber('3.2'); | ||
|  |  * // => 3.2
 | ||
|  |  */ | ||
|  | function toNumber(value) { | ||
|  |   if (typeof value == 'number') { | ||
|  |     return value; | ||
|  |   } | ||
|  |   if (isSymbol(value)) { | ||
|  |     return NAN; | ||
|  |   } | ||
|  |   if (isObject(value)) { | ||
|  |     var other = typeof value.valueOf == 'function' ? value.valueOf() : value; | ||
|  |     value = isObject(other) ? (other + '') : other; | ||
|  |   } | ||
|  |   if (typeof value != 'string') { | ||
|  |     return value === 0 ? value : +value; | ||
|  |   } | ||
|  |   value = value.replace(reTrim, ''); | ||
|  |   var isBinary = reIsBinary.test(value); | ||
|  |   return (isBinary || reIsOctal.test(value)) | ||
|  |     ? freeParseInt(value.slice(2), isBinary ? 2 : 8) | ||
|  |     : (reIsBadHex.test(value) ? NAN : +value); | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Converts `value` to a string. An empty string is returned for `null` | ||
|  |  * and `undefined` values. The sign of `-0` is preserved. | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 4.0.0 | ||
|  |  * @category Lang | ||
|  |  * @param {*} value The value to process. | ||
|  |  * @returns {string} Returns the string. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.toString(null); | ||
|  |  * // => ''
 | ||
|  |  * | ||
|  |  * _.toString(-0); | ||
|  |  * // => '-0'
 | ||
|  |  * | ||
|  |  * _.toString([1, 2, 3]); | ||
|  |  * // => '1,2,3'
 | ||
|  |  */ | ||
|  | function toString(value) { | ||
|  |   return value == null ? '' : baseToString(value); | ||
|  | } | ||
|  | 
 | ||
|  | /** | ||
|  |  * Checks if `string` starts with the given target string. | ||
|  |  * | ||
|  |  * @static | ||
|  |  * @memberOf _ | ||
|  |  * @since 3.0.0 | ||
|  |  * @category String | ||
|  |  * @param {string} [string=''] The string to inspect. | ||
|  |  * @param {string} [target] The string to search for. | ||
|  |  * @param {number} [position=0] The position to search from. | ||
|  |  * @returns {boolean} Returns `true` if `string` starts with `target`, | ||
|  |  *  else `false`. | ||
|  |  * @example | ||
|  |  * | ||
|  |  * _.startsWith('abc', 'a'); | ||
|  |  * // => true
 | ||
|  |  * | ||
|  |  * _.startsWith('abc', 'b'); | ||
|  |  * // => false
 | ||
|  |  * | ||
|  |  * _.startsWith('abc', 'b', 1); | ||
|  |  * // => true
 | ||
|  |  */ | ||
|  | function startsWith(string, target, position) { | ||
|  |   string = toString(string); | ||
|  |   position = baseClamp(toInteger(position), 0, string.length); | ||
|  |   target = baseToString(target); | ||
|  |   return string.slice(position, position + target.length) == target; | ||
|  | } | ||
|  | 
 | ||
|  | module.exports = startsWith; |