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What is the difference between require and require-dev sections in composer.json?
...ill never be installed
For reference, see:
https://getcomposer.org/doc/04-schema.md#require
https://getcomposer.org/doc/04-schema.md#require-dev
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Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...cattered around this site.
tmp <- data.frame(x=gl(2,3, labels=letters[24:25]),
y=gl(3,1,6, labels=letters[1:3]),
z=c(1,2,3,3,3,2))
Using the tidyverse:
The new cool new way to do this is with pivot_wider from tidyr 1.0.0. It returns a data frame, which is...
String concatenation: concat() vs “+” operator
... Code:
0: new #2; //class java/lang/StringBuilder
3: dup
4: invokespecial #3; //Method java/lang/StringBuilder."<init>":()V
7: aload_1
8: invokevirtual #4; //Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
11: aload_2
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Efficient string concatenation in C++
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edited Mar 16 '12 at 13:41
codeling
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answered M...
What is an uninterruptible process?
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Anthony Geoghegan
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answered Oct 21 '08 at 22:14
ddaaddaa
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Replace whole line containing a string using Sed
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499
You can use the change command to replace the entire line, and the -i flag to make the changes...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
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Using GHC 7.0.3, gcc 4.4.6, Linux 2.6.29 on an x86_64 Core2 Duo (2.5GHz) machine, compiling using ghc -O2 -fllvm -fforce-recomp for Haskell and gcc -O3 -lm for C.
Your C routine runs in 8.4 seconds (faster than your run probably because of -O3)...
Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
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Lily BallardLily Ballard
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