Substring/Top and tail: Difference between revisions
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m (→{{header|Python}}: ( comprehension in lieu of ap (<*>) )) |
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=={{header|Python}}==
<lang python>print "knight"[1:] # strip first character
print "socks"[:-1] # strip last character
print "brooms"[1:-1] # strip both first and last characters</lang>
Or, composing atomic functional expressions for these slices:
<lang python>from functools import (reduce)
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def main():
print (
["knights"]
)
)
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def init(xs):
return xs[:-1]
# ap (<*>) :: [(a -> b)] -> [a] -> [b]
def ap(fs):
return lambda xs: reduce(
lambda a, f: a + reduce(
lambda a, x: a + [f(x)], xs, []
), fs, []
)
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