standard operations on arrays/objects

arrays.js

// returns elements not ends
function elementsNotEndsBy(ending, array) {
  var regex = new RegExp(ending + '$');
  return array.filter(entry => !regex.test(entry));
}

elementsNotEndsBy('berry', ['strawberry', 'apple', 'blueberry']);         // => ['apple']
elementsNotEndsBy('allEntries', ['strawberry', 'apple', 'blueberry']);    // => ['strawberry', 'apple', 'blueberry']
elementsNotEndsBy('allEntries', []);                                      // => []

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objects.js

function deepSetter(obj, path, value) {
	var i = 0;
	for (i = 0; i < path.length - 1; i++) {
		if (obj.hasOwnProperty(path[i]) === false) {
			obj[path[i]] = {};
		}
		obj = obj[path[i]];
	}

	obj[path[i]] = value;
}

var obj = {a: 'foo', b: {c: 'foo2'}};
deepSetter(obj, ['b', 'c'], 'bar');                    // =>  obj = {a: 'foo', b: {c: 'bar'}}
deepSetter(obj, ['d'], 'newEntry');                    // =>  obj = {a: 'foo', b: {c: 'foo2'}, d: 'newEntry'}
deepSetter(obj, ['e', 'f'], 'newObject');              // =>  obj = {a: 'foo', b: {c: 'foo2'}, e: {f: 'newObject'}}
deepSetter(obj, ['g', 'h', 'i', 'j'], 'deepObject');   // =>  obj = {a: 'foo', b: {c: 'foo2'}, g: {h: {i: {j: 'deepObject'}}}}
deepSetter(obj, ['b'], 'bar');                         // ERROR : an existing obj cannot be replace by a string 

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function deepGetter(obj, path) {
	var i = 0;
	for (i = 0; i < path.length - 1; i++) {
		if (obj.hasOwnProperty(path[i])) {
			obj = obj[path[i]];
		} else {
			return undefined;
		}
	}

	return obj[path[i]];
}

var obj = {a: 'foo', b: {c: 'foo2'}};
deepGetter(obj, ['a']);               // => 'foo'
deepGetter(obj, ['b']);               // => { c: 'foo2' }
deepGetter(obj, ['b', 'c']);          // => 'foo2'
deepGetter(obj, ['b', 'c', 'd']);     // => undefined
deepGetter(obj, ['d', 'e', 'f']);     // => undefined

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