aprilmintacpineda/docs.md

## docs.md

      
    Raw
  

              docs.md
            
          
    Looping through elements

http://jsben.ch/UgRvN

Accesses length property every loop.
Accesses length property only once and saves it into a constant.
Uses forEach method.

Removing an element of an array

http://jsben.ch/Io731

array.splice.
array.filter.
Manually looping through each of the element to create a new array.

Notes


Unlike array.filter, array.splice mutates the original array. So these two have different use cases. http://jsben.ch/DA7U2 compares array.filter and a regular for-loop.

array.map vs for-loop

http://jsben.ch/coXD5
array.forEach vs for-loop

http://jsben.ch/XuoTX
for-loop vs while-loop

http://jsben.ch/GjSyQ
Checking if object has a particular key


in operator
strict comparison operator
Object.hasOwnProperty
object.key expression

http://jsben.ch/EwSf2
Credits to who ever made it. I simply added a new code block.
Checking if an element exists in an array

http://jsben.ch/JLngr

array.indexOf
array.includes
for-loop
while-loop