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How do you know when to use fold-left and when to use fold-right?
...oldr proceeds:
1 + (2 + (3 + 4))
where you can see the traversal to the base case 4 and building up the result from there.
So I posit a rule of thumb: if it looks like a list iteration, one that would be simple to write in tail-recursive form, foldl is the way to go.
But really this will be pro...
How do I check if there are duplicates in a flat list?
...an be ignored, which is the ultimate shortcut.
This is an interesting set based approach I adapted straight from moooeeeep:
def getDupes(l):
seen = set()
seen_add = seen.add
for x in l:
if x in seen or seen_add(x):
yield x
Accordingly, a full list of dupes would b...
What's the difference between globals(), locals(), and vars()?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Python module for converting PDF to text [closed]
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regarding python 3, there is a six-based fork pypi.python.org/pypi/pdfminer.six
– Denis Cornehl
Dec 4 '15 at 10:10
1
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Real world example about how to use property feature in python?
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if value > 10:
raise ValueError("This pedometer is based on the human stride - a stride length above 10m is not supported")
else:
self._stride_length = value
share
|
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How to print to console in pytest?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How do I import other TypeScript files?
...h tsc on your main .ts file. The compiler figures out all the dependencies based on your reference tags and generates a single output .js file for the entire application: tsc --out app.js main.ts
– null
Apr 13 '14 at 9:57
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Merge, update, and pull Git branches without using checkouts
... git merge $quiet --ff-only "$commit"
else
if [ "$(git merge-base $branch_orig_hash $commit_orig_hash)" != "$branch_orig_hash" ]; then
echo "Error: merging $commit into $branch would not be a fast-forward" 1>&2
exit 1
fi
echo "Updating ${b...
How to add target=“_blank” to JavaScript window.location?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How to check if array is empty or does not exist? [duplicate]
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Robby CornelissenRobby Cornelissen
64.7k1717 gold badges8989 silver badges109109 bronze badges
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