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Checking if a key exists in a JS object
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edited Dec 5 '14 at 15:30
answered Jun 15 '13 at 18:10
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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
...ven less portable and break on fairly recent systems (e.g. even Ubuntu 16.04 if not later).
Another downside is that since you aren't calling an explicit executable, it's got the potential for mistakes, and on multiuser systems security problems (if someone managed to get their executable called ba...
How to check a string for specific characters?
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print('Found')
else
print('Not found')
... or
chars = set('0123456789$,')
if any((c in chars) for c in s):
print('Found')
else:
print('Not Found')
[Edit: added the '$' in s answers]
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Relative frequencies / proportions with dplyr
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mutate(freq = n / sum(n))
# am gear n freq
# 1 0 3 15 0.7894737
# 2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vignette:
When you group by multiple variables, each summary peels off one level of the grouping. That makes it easy to prog...
How to set .net Framework 4.5 version in IIS 7 application pool
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There is no 4.5 application pool. You can use any 4.5 application in 4.0 app pool. The .NET 4.5 is "just" an in-place-update not a major new version.
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How to get all subsets of a set? (powerset)
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edited Jun 9 '19 at 17:49
Ran Feldesh
53955 silver badges1313 bronze badges
answered Sep 26 '09 at 22...
How do I put a bunch of uncommitted changes aside while working on something else
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4 Answers
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Can Protractor and Karma be used together?
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4 Answers
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Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
... iOS 7
– Lee Probert
Sep 27 '13 at 14:19
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