lenye_base/search.js

基础方法

'use strict';

require('./get_tag.js');
var is_function = require('./is_function.js');

function search(needle, haystack, argStrict) {
  var strict = !!argStrict;
  var key = '';
  var _needle = needle;

  if (is_function(_needle) && _needle.exec) {
    // Duck-type for RegExp
    if (!strict) {
      // Let's consider case sensitive searches as strict
      var flags = 'i' + (_needle.global ? 'g' : '') + (_needle.multiline ? 'm' : '') + ( // sticky is FF only
      _needle.sticky ? 'y' : '');
      _needle = new RegExp(_needle.source, flags);
    }

    for (key in haystack) {
      if (haystack.hasOwnProperty(key)) {
        if (_needle.test(haystack[key])) {
          return key;
        }
      }
    }

    return false;
  }

  for (key in haystack) {
    if (haystack.hasOwnProperty(key)) {
      // eslint-disable-next-line eqeqeq
      if (strict && haystack[key] === needle || !strict && haystack[key] == needle) {
        return key;
      }
    }
  }

  return false;
}

module.exports = search;