Where Art Thou

where.js

function where(collection, source) {
  var arr = [];
  var checker = Object.keys(source);
  var checkerValue = source[checker];
  var keysCollectionLength = Object.keys(collection).length;
  var toCheck;
  var outputCollectionKeys = [];
  for (var i=0;i<keysCollectionLength;i++){
    toCollection = Object.keys(collection[i]);
    toCheck = collection[i][checker];
    var collectionLength = collection[i].length;
    if ((toCheck == checkerValue)&&(toCollection.length >= checker.length)){
      arr.push(collection[i]);
    }
  }
  return arr;
}

where([{ "a": 1, "b": 2 }, { "a": 1 }, { "a": 1, "b": 2, "c": 2 }], { "a": 1, "b": 2 });

WhereArtThou.markdown

Where Art Thou

A function that looks through an array of objects (first argument) and returns an array of all objects that have matching property and value pairs (second argument). Each property and value pair of the source object has to be present in the object from the collection if it is to be included in the returned array. For example, if the first argument is [{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], and the second argument is { last: "Capulet" }, then function returns the third object from the array (the first argument), because it contains the property and it's value, that was passed on as the second argument.

A script by V.

License.