join() python
# example of join() function in python
numList = ['1', '2', '3', '4']
separator = ', '
print(separator.join(numList))join() python
# example of join() function in python
numList = ['1', '2', '3', '4']
separator = ', '
print(separator.join(numList))python slice
# array[start:stop:step]
# start = include everything STARTING AT this idx (inclusive)
# stop = include everything BEFORE this idx (exclusive)
# step = (can be ommitted) difference between each idx in the sequence
arr = ['a', 'b', 'c', 'd', 'e']
arr[2:] => ['c', 'd', 'e']
arr[:4] => ['a', 'b', 'c', 'd']
arr[2:4] => ['c', 'd']
arr[0:5:2] => ['a', 'c', 'e']
arr[:] => makes copy of arrpython slice
a[start:stop] # items start through stop-1
a[start:] # items start through the rest of the array
a[:stop] # items from the beginning through stop-1
a[:] # a copy of the whole arraypython3 slice
# array[start:stop:step]
# start = include everything STARTING AT this idx (inclusive)
# stop = include everything BEFORE this idx (exclusive)
# step = (can be committed) difference between each idx in the sequence
arr = ['a', 'b', 'c', 'd', 'e']
arr[2:] => ['c', 'd', 'e']
arr[:4] => ['a', 'b', 'c', 'd']
arr[2:4] => ['c', 'd']
arr[0:5:2] => ['a', 'c', 'e']
arr[:] => makes copy of arrpython slice operator
string = 'string_text'
beginning = 0 # at what index the slice should start.
end = len(string) # at what index the slice should end.
step = 1 # how many characters the slice should go forward after each letter
new_string = string[beginning:end:step]
# some examples
a = 0
b = 3
c = 1
new_string = string[a:b:c] # will give you: str
# ____________________________________________
a = 2
b = len(string) - 2
c = 1
new_string = string[a:b:c] # will give you: ring_teCopyright © 2021 Codeinu
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