| var baseToString = require('../internal/baseToString'); |
| |
| /* Native method references for those with the same name as other `lodash` methods. */ |
| var nativeMin = Math.min; |
| |
| /** |
| * Checks if `string` starts with the given target string. |
| * |
| * @static |
| * @memberOf _ |
| * @category String |
| * @param {string} [string=''] The string to search. |
| * @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 = baseToString(string); |
| position = position == null |
| ? 0 |
| : nativeMin(position < 0 ? 0 : (+position || 0), string.length); |
| |
| return string.lastIndexOf(target, position) == position; |
| } |
| |
| module.exports = startsWith; |