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Getting the first character of a string with $str[0]
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As of today (10th May'18), a quote from the liked PHP docs: Note: Strings may also be accessed using braces, as in $str{42}, for the same purpose. Seems like this syntax is going to stay for a while.
– Fr0zenFyr
May...
Assigning a variable NaN in python without numpy
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Yes -- use math.nan.
>>> from math import nan
>>> print(nan)
nan
>>> print(nan + 2)
nan
>>> nan == nan
False
>>> import math
>>> math.isnan(nan)
True
Before Python 3.5, one could use float("nan") (case i...
Argparse: Required argument 'y' if 'x' is present
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That would stop you from setting --lport or --rport to 0, which might be a valid input to the program.
– borntyping
Mar 1 '18 at 14:34
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Git diff against a stash
...git stash show -p
See an arbitrary stash:
git stash show -p stash@{1}
From the git stash manpages:
By default, the command shows the diffstat, but it will accept any
format known to git diff (e.g., git stash show -p stash@{1} to view
the second most recent stash in patch form).
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Autoincrement VersionCode with gradle extra properties
...file to increase the versionCode, but I would like to read the versionCode from an external file and depending if it is the release flavor or the debug flavor increase the versionCode. I tried the extra properties, but you can't save them, which means that next time I build it I'm getting the same v...
Skip rows during csv import pandas
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You can try yourself:
>>> import pandas as pd
>>> from StringIO import StringIO
>>> s = """1, 2
... 3, 4
... 5, 6"""
>>> pd.read_csv(StringIO(s), skiprows=[1], header=None)
0 1
0 1 2
1 5 6
>>> pd.read_csv(StringIO(s), skiprows=1, header=Non...
How to change line width in IntelliJ (from 120 character)
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You are without fault and a beautiful human being. From the depths of my heart and my soul, you have my undying gratitude, for now and always.
– Darth Egregious
Oct 5 '17 at 21:04
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Is an array name a pointer?
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Also, apart from sizeof(), the other context in which there's no array->pointer decay is operator & - in your example above, &a will be a pointer to an array of 7 int, not a pointer to a single int; that is, its type will be i...
Scala type programming resources
...l programming: "object-oriented" and "functional". Most examples linked to from here follow the object-oriented paradigm.
A good, fairly simple example of type-level programming in the object-oriented paradigm can be found in apocalisp's implementation of the lambda calculus, replicated here:
// A...
Why are margin/padding percentages in CSS always calculated against width?
...poyzer I'd guess in the simplest case that browsers calculate block widths from the outside in (root to tips), then flow content into those blocks to determine their heights (tips to root).
– sam
Oct 10 '13 at 1:47
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