Links

• Ref: iteration
• Arrays in JavaScript
• Arrays and Regular Expressions
• Array comprehensions
• Working with Array-like objects
  • NodeList  arguments 
• Array Methods
• Array
  • splice(index , howMany[, element1[, ...[, elementN]]])
    • Returns an array containing the removed elements. If only one element is removed, an array of one element is returned.
  • indexOf(searchElement[, fromIndex])
    • Returns the first index at which a given element can be found in the array, or -1 if it is not present.
• More arrays:  Float32Array  Float64Array  Int16Array  Int32Array  Int8Array  Uint16Array  Uint32Array  Uint8Array 

Methods

• concat() 
• join(deliminator = ",") 
• push()  pop() 
• shift()  unshift() 
• slice(start_index, upto_index)  splice(index, count_to_remove, addelement1, addelement2, ...) 
• sort()  reverse() 
• indexOf(searchElement[, fromIndex])  lastIndexOf(searchElement[, fromIndex]) 
• forEach(callback[, thisObject]) 
• map(callback[, thisObject])  filter(callback[, thisObject])  every(callback[, thisObject])  some(callback[, thisObject]) 

forEach

Ref:  forEach()

Note:  There is no way to stop or break a forEach loop.  The solution is to use Array.every or Array.some (return false to break the loop.)

var colors = ['red', 'green', 'blue'];
console.log(".forEach on " + colors);
colors.forEach(function(value, index, arr) {
  console.log("a[%s] = %s", value, index);
});