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Python non-greedy regexes
How do I make a python regex like "(.*)" such that, given "a (b) c (d) e" python matches "b" instead of "b) c (d" ?
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Difference between declaring variables before or in loop?
...w-away variable before a loop, as opposed to repeatedly inside the loop, makes any (performance) difference?
A (quite pointless) example in Java:
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Total memory used by Python process?
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Here is a useful solution that works for various operating systems, including Linux, Windows 7, etc.:
import os
import psutil
process = psutil.Process(os.getpid())
print(process.memory_info().rss) # in bytes
On my current Python 2.7 install with psutil ...
Getting the array length of a 2D array in Java
...intln(foo[1].length); //4
}
Column lengths differ per row. If you're backing some data by a fixed size 2D array, then provide getters to the fixed values in a wrapper class.
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Array initializing in Scala
I'm new to Scala ,just started learning it today.I would like to know how to initialize an array in Scala.
6 Answers
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Convert character to ASCII numeric value in java
...improves readability.
int ascii = character; // Even this will do the trick.
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How to scale a UIImageView proportionally?
... edited Aug 23 '11 at 3:43
Srikar Appalaraju
63.5k4747 gold badges202202 silver badges257257 bronze badges
answered Feb 20 '10 at 0:29
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Programmatically find the number of cores on a machine
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BullyWiiPlaza
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answered Sep 29 '08 at 22:14
paxos1977paxos1977...
Extract substring using regexp in plain bash
...amp;&
echo ${BASH_REMATCH[1]}
another solution using grep and look-around advanced regex :
$ echo "US/Central - 10:26 PM (CST)" | grep -oP "\-\s+\K\d{2}:\d{2}"
another solution using sed :
$ echo "US/Central - 10:26 PM (CST)" |
sed 's/.*\- *\([0-9]\{2\}:[0-9]\{2\}\).*/\1/'
anothe...
Is it possible to declare two variables of different types in a for loop?
...s (since gcc-7 and clang-4.0) (clang live example). This allows us to unpack a tuple like so:
for (auto [i, f, s] = std::tuple{1, 1.0, std::string{"ab"}}; i < N; ++i, f += 1.5) {
// ...
}
The above will give you:
int i set to 1
double f set to 1.0
std::string s set to "ab"
Make sure to...