大约有 15,900 项符合查询结果（耗时：0.0341秒） [XML]
Which is faster: while(1) or while(2)?
...on for each iteration.
First example (returning 1):
.L4:
call x
testl %eax, %eax
jne .L4
movl $0, %eax
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.ident "GCC: (tdm64-2) 4.8.1"
Second example (returning sqrt(7)):
.L4:
call x
xorpd %xmm1,...
examining history of deleted file
...ectory
dhcp-120:/tmp/slosh 588% git log -n 1 -- slosh.tac
commit 8d4a1f1a94e4aa37c1cb9d329a140d08eec1b587
Author: Dustin Sallings <dustin@spy.net>
Date: Mon Dec 15 11:25:00 2008 -0800
Get rid of a .conf and replace it with .tac.
dhcp-120:/tmp/slosh 589% git checkout 8d4a1f^ slosh.tac
dh...
Significant new inventions in computing since 1980
... community wiki
2 revs, 2 users 92%Dylan Beattie
1
...
How do you Encrypt and Decrypt a PHP String?
...zero($ciphertext);
sodium_memzero($key);
return $plain;
}
Then to test it out:
<?php
// This refers to the previous code block.
require "safeCrypto.php";
// Do this once then store it somehow:
$key = random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);
$message = 'We are all living in a yel...
How to split last commit into two in Git
...2" put in the last line):
$ git commit -am "Added last line"
[master 5e284e6] Added last line
1 files changed, 1 insertions(+), 0 deletions(-)
Let's check the log to see what commits we have:
$ git log -p -n2 | cat
Commit 5e284e652f5e05a47ad8883d9f59ed9817be59d8
Author: ...
Date: ...
Added...
Access lapply index names inside FUN
...ormance loss? Yes! here are the benchmarks:
> x <- as.list(seq_len(1e6))
> system.time( y <- lapply(x, function(x){parent.frame()$i[]}) )
user system elapsed
2.38 0.00 2.37
> system.time( y <- lapply(x, function(x){parent.frame()$i[]}) )
user system elapsed
2.45 0.00 2.45
> sy...
How to set tbody height with overflow scroll
...ay evenly the cells , use table-layout:fixed;
DEMO
CSS for your HTML test :
table ,tr td{
border:1px solid red
}
tbody {
display:block;
height:50px;
overflow:auto;
}
thead, tbody tr {
display:table;
width:100%;
table-layout:fixed;/* even columns width , fix width o...
Using Emacs to recursively find and replace in text files not already open
...ace the thing at point: gist.github.com/anonymous/055a9d62f9fc824153599724b8f44d57
– Att Righ
May 2 '17 at 11:31
can I...
Why would finding a type's initializer throw a NullReferenceException?
This has got me stumped. I was trying to optimize some tests for Noda Time, where we have some type initializer checking. I thought I'd find out whether a type has a type initializer (static constructor or static variables with initializers) before loading everything into a new AppDomain . To my ...
Select the values of one property on all objects of an array in PowerShell
...tically defined) regular .NET type. Both scenarios are covered below.
The tests use already-in-memory-in-full collections as input, so as to focus on the pure property extraction performance. With a streaming cmdlet / function call as the input, performance differences will generally be much less p...