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