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How to properly seed random number generator
...entered manually by a human; excluding 0, O, 1, and l can help reduce user error.
var alpha = "abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789"
// generates a random string of fixed size
func srand(size int) string {
buf := make([]byte, size)
for i := 0; i < size; i++ {
...
PHP中的错误处理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...么呢？统一管理错误日志，或者呈现一个相对友好的错误提示页面等等。
但需要注意的是set_error_handler无法捕捉某些Fatal error，比如下面这个错误：
<?php
set_error_handler(function($errno, $errstr, $errfile, $errline) {
var_dump($errno, $err...
How do you iterate through every file/directory recursively in standard C++?
...
} while (FindNextFile(hFind, &ffd) != 0);
if (GetLastError() != ERROR_NO_MORE_FILES) {
FindClose(hFind);
return false;
}
FindClose(hFind);
hFind = INVALID_HANDLE_VALUE;
}
return true;
}
int main(int argc, char* argv[])
...
What does Redis do when it runs out of memory?
... or if the policy is
# set to 'noeviction', Redis will start to reply with errors to commands
# that would use more memory, like SET, LPUSH, and so on, and will continue
# to reply to read-only commands like GET.
#
# This option is usually useful when using Redis as an LRU cache, or to set
# a hard ...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...<stdio.h>
# define PRINT_MSG(fmt, args...) printf(fmt, ## args)
# define ERROR_MSG(fmt, args...) printf(fmt, ## args)
#else
# if !defined(PRINT_MSG)
# define PRINT_MSG(fmt, args...)
# endif
# if !defined(ERROR_MSG)
# define ERROR_MSG(fmt, args...)
# endif
#endif
typedef unsigned int u...
How do I show the value of a #define at compile-time?
...
As far as I know '#error' only will print strings, in fact you don't even need to use quotes.
Have you tried writing various purposefully incorrect code using "BOOST_VERSION"? Perhaps something like "blah[BOOST_VERSION] = foo;" will tell you ...
Alias with variable in bash [duplicate]
...
Please fix the syntax error (missing ; before }) and double-quote $1 so as to also support filenames with embedded whitespace and other shell metacharacters.
– mklement0
Feb 21 '16 at 22:22
...
Could not load file or assembly 'System.Web.Mvc'
...stem.Web.WebPages.Razor
Godaddy Deployment worked perfectly. Turn custom errors off and add references to correct the errors. That should lead you in the right direction.
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Explicitly select items from a list or tuple
... recent call last):
File "<stdin>", line 1, in <module>
IndexError: invalid index
>>> myBigList[[87, 342, 217, 998, 500]]
array([ 87, 342, 217, 998, 500])
>>> myBigList[numpy.array([87, 342, 217, 998, 500])]
array([ 87, 342, 217, 998, 500])
The tuple doesn't work th...
PHP编译configure时常见错误 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是不对的，虽然能解决configure的错误，但是make的时候会提示错误，正确的做法应该是
centos: yum -y install ncurses-devel
debian: apt-get install libncurses5-dev
2、configure: error: xml2-config not found. Please check your libxml2 installation.
centos: yum -y instal...