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What are the differences between local branch, local tracking branch, remote branch and remote track
...-track <branchname> [<start-point]
Example:
git branch --track hello-kitty origin/hello-kitty
To delete a branch on a remote machine:
git push --delete <remote> <branchname>
To delete all remote-tracking branches that are stale, that is, where the corresponding branches on...
How to do a logical OR operation in shell scripting
...d work:
#!/bin/bash
if [ "$#" -eq 0 ] || [ "$#" -gt 1 ] ; then
echo "hello"
fi
I'm not sure if this is different in other shells but if you wish to use <, >, you need to put them inside double parenthesis like so:
if (("$#" > 1))
...
...
Regex for numbers only
....21
76876876
.32
-894
-923.21
-76876876
-.32
some strings that doesn't:
hello
9bye
hello9bye
888,323
5,434.3
-8,336.09
87078.
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How do I make $.serialize() take into account those disabled :input elements?
...
Use readonly inputs instead of disabled inputs:
<input name='hello_world' type='text' value='hello world' readonly />
This should get picked up by serialize().
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How to use double or single brackets, parentheses, curly braces
...d
$ var="abcde"; echo ${var/de/12}
abc12
Use a default value
$ default="hello"; unset var; echo ${var:-$default}
hello
and several more
Also, brace expansions create lists of strings which are typically iterated over in loops:
$ echo f{oo,ee,a}d
food feed fad
$ mv error.log{,.OLD}
(error.log...
What does the question mark and the colon (?: ternary operator) mean in objective-c?
...than once. For example: [myArray firstObject] ? [myArray firstObject] : @"Hello World"; calls firstObject twice (if firstObject does not return nil), where [myArray firstObject] ?: @"Hello World"; produces the identical result but never calls firstObject more than once.
– nhgr...
Convert a String In C++ To Upper Case
...boost/algorithm/string.hpp>
#include <string>
std::string str = "Hello World";
boost::to_upper(str);
std::string newstr = boost::to_upper_copy<std::string>("Hello World");
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不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
Hello, this is zebra (version 0.95a).
Copyright 1996-2004 Kunihiro Ishiguro.
User Access Verification
Password:
as1_route> en
Password:
as1_route# show run
Current configuration:
!
hostname as1_route
pas...
What's the difference between Perl's backticks, system, and exec?
...xec command";
my $data2 = exec('ls');
print "Now END exec command";
print "Hello $data2\n\n";
In above code, there are three print statements, but due to exec leaving the script, only the first print statement is executed. Also, the exec command output is not being assigned to any variable.
Here,...
Trim spaces from end of a NSString
...paces from the end of a string. How can I do that?
Example: if string is "Hello " it must become "Hello"
14 Answers
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