minor text change about -ve index
added suib title

These could be used as conclusion/summary
created fun with for loop
calcaulate array length only once
hoist array length
added 2nd statement of for loop
miss 2nd statement
miss 3rd statement
push carefully
one line about pop
added unshift mulitplel elements
added line for shift and warning
added basic filter
added actual filter by index
added basic example for some
seperated the array methods
indexOf good and bad
added content list
updated list and added link
renamed the file