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Running multiple commands with xargs
...gs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
...or, without a Useless Use Of cat:
<a.txt xargs -d $'\n' sh -c 'for arg do command1 "$arg"; command2 "$arg"; ...; done' _
To explain some of the finer points:
The use of "$arg" instead of % (and the absence of...
What is the best collation to use for MySQL with PHP? [closed]
...g characters in the language) and performance. The only special one is utf8_bin which is for comparing characters in binary format.
utf8_general_ci is somewhat faster than utf8_unicode_ci, but less accurate (for sorting). The specific language utf8 encoding (such as utf8_swedish_ci) contain additio...
How to export data as CSV format from SQL Server using sqlcmd?
...low commas inside the data? Do we have to surround every column with '""'+ ___ +'""'?
– Ahmed
Apr 1 '15 at 0:41
2
...
Caching a jquery ajax response in javascript/browser
...
* @type {number}
*/
timeout: 30000,
/**
* @type {{_: number, data: {}}}
**/
data: {},
remove: function (url) {
delete localCache.data[url];
},
exist: function (url) {
return !!localCache.data[url] && ((new Date().getTime() - local...
Why does SIGPIPE exist?
... changing global signal dispositions is to temporarily mask it with pthread_sigmask, perform the write, then perform sigtimedwait (with zero timeout) to consume any pending SIGPIPE signal (which is sent to the calling thread, not the process) before unmasking it again.
I believe the reason SIGPIPE ...
How to have the cp command create any necessary folders for copying a file to a destination [duplica
...ould be to combine mkdir and cp:
mkdir -p /foo/bar && cp myfile "$_"
As an aside, when you only need to create a single directory in an existing hierarchy, rsync can do it in one operation. I'm quite a fan of rsync as a much more versatile cp replacement, in fact:
rsync -a myfile /foo/b...
When should I use GET or POST method? What's the difference between them?
...ery string. So a POST request is a superset of a GET request; you can use $_GET in a POST request, and it may even make sense to have parameters with the same name in $_POST and $_GET that mean different things.
For example, let's say you have a form for editing an article. The article-id may be in...
How do you UrlEncode without using System.Web?
...t; Uri "*" Data "*"
'-' -> Uri "-" Data "-"
'.' -> Uri "." Data "."
'_' -> Uri "_" Data "_"
'~' -> Uri "~" Data "~"
'0' -> Uri "0" Data "0"
.....
'9' -> Uri "9" Data "9"
'A' -> Uri "A" Data "A"
......
'Z' -> Uri "Z" Data "Z"
'a' -> Uri "a" Data "a"
.....
'z' -> Uri "...
CListCtrl 扩展风格设置方法：SetExtendedStyle和ModifyStyleEx 区别 - C++...
...常常想到用ModifyStyleEx 来设定，代码如下：ModifyStyleEx(0,LVS_EX_GRIDLINES)
这是不正确的，正确的设定应该是：SetExtendedStyle(LVS_EX_GRIDLINES)
那么，ModifyStyleEx和SetExtendedStyle区别在哪里？实际上，ModifyStyleEx只是对窗...
UISegmentedControl below UINavigationbar in iOS 7
...WillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self _moveHairline:YES];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[self _moveHairline:NO];
}
- (void)_moveHairline:(BOOL)appearing
{
// move the hairline below the segmentbar
...