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How to grep (search) committed code in the Git history
...ommit content (i.e., actual lines of source, as opposed to commit messages and the like), you need to do:
git grep <regexp> $(git rev-list --all)
git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error.
If you want to limit the sea...
Why should I use 'li' instead of 'div'?
...or semantic correctness. HTML has the ability to express lists of things, and it helps the Google robot, screen readers, and all manner of users who don't care solely about the presentation of the site understand your content better.
...
Difference between dispatch_async and dispatch_sync on serial queue?
...k is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
printf("2");
dispatch_async(_serialQueue, ^{ printf("3"); });
printf("4");
It may print 2413 or 2143 or 1234 but 1 always before 3
for ...
Hiding the scroll bar on an HTML page
...w: hidden;
}
</style>
The code above hides both the horizontal and vertical scrollbar.
If you want to hide only the vertical scrollbar, use overflow-y:
<style type="text/css">
body {
overflow-y: hidden;
}
</style>
And if you want to hide only the horizonta...
What is the email subject length limit?
...e RFC 2822, section 2.1.1 to start.
There are two limits that this
standard places on the number of
characters in a line. Each line of
characters MUST be no more than 998
characters, and SHOULD be no more than
78 characters, excluding the CRLF.
As the RFC states later, you can work a...
What is an Intent in Android?
... happen. Depending on the intent, apps or the OS might be listening for it and will react accordingly. Think of it as a blast email to a bunch of friends, in which you tell your friend John to do something, or to friends who can do X ("intent filters"), to do X. The other folks will ignore the email...
Why am I getting 'Assembly '*.dll' must be strong signed in order to be marked as a prerequisite.'?
I'm trying to compile my excel addin using C# 4.0, and started to get this problem when building my project in Visual Studio. It's important to tell you that I haven't had this problem before. What could cause this to happen?
...
Read and write a String from text file
I need to read and write data to/from a text file, but I haven't been able to figure out how.
21 Answers
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What is the most ridiculous pessimization you've seen? [closed]
...ence.
Our new environment was 32-bit Sparc Solaris.
One of the guys went and changed all ints to shorts to speed up our code, since grabbing 16 bits from RAM was quicker than grabbing 32 bits.
I had to write a demo program to show that grabbing 32-bit values on a 32-bit system was faster than gra...
Coroutine vs Continuation vs Generator
What is the difference between a coroutine and a continuation and a generator ?
3 Answers
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