repeatString string ?depth
#depth >> how many times to repeat the string
repeatString "bash" 5 # bashbashbashbashbash

charAt string positionToSearch
charAt "bash" 2 # a

includes string stringToSearch ?depth
#depth  where to start search from
includes "bash" sh 2
#returns 1 for false or 0 for true

endsWith string endToCheck ?depth
# depth >> where to start the search from
endsWith "bash" a 2
#returns 1 for false or 0 for true

isInteger number
#return 1 for non integers or 0 for integers

int number
int 25.8 ; # 25

destructure array values
array=( bash ksh zsh )
destructure ${array[@]} "shell1,,shell2"
echo $shell1  # bash
echo $shell2  # zsh
destructure ${array[@]} "shell1,shell2,shell3"
echo $shell1 # bash
echo $shell2 # ksh
echo $shell3 # zsh

... string
str=bash
array=( $(... $str) )
echo ${str[@]} # b a s h

s() { echo $(( $1 * $1 )) ;}
array=( 1 2 3 4 5 6 )
foreach ${array[@]} s # 2 4 6 8 10 12
foreach ${array[@]} 'function s() { echo $(( $1 + $1 )) ;}' # always end the function with a ;} 
# 2 4 6 8 10 12

copyWithin arrayArgument indexToCopyfrom indexToCopyTo
array=( "bash" "ksh" "zsh" "csh" )
copyWithin "${array[*]}" 1 3 # bash ksh zsh ksh