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Import existing source code to GitHub
...ttps://github.com/youruser/somename.git
If your local GIT repo is already set up, skips steps 2 and 3
Locally, at the root directory of your source, git init
2a. If you initialize the repo with a .gitignore and a README.md you should do a git pull {url from step 1} to ensure you don't commit fil...
How to get last inserted id?
... Hmm. When I tried this I got an error: "Object reference not set to an instance of an object." even though it is run immediately after the Execute.
– khany
May 17 '14 at 10:39
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How to check if a number is a power of 2
...y = x & (-x). This test is just a special case of clearing the lowest set bit.
– Peter Cordes
Sep 18 at 18:34
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How to stop unwanted UIButton animation on title change?
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This works for custom buttons:
[UIView setAnimationsEnabled:NO];
[_button setTitle:@"title" forState:UIControlStateNormal];
[UIView setAnimationsEnabled:YES];
For system buttons you need to add this before re-enabling animations (thank you @Klaas):
[_button lay...
How to know what the 'errno' means?
When calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ?
15 Answers
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Why is 1/1/1970 the “epoch time”?
... reason, the time represented by the number 0 (called the epoch) had to be set in the very recent past. As this was in the early 1970s, the epoch was set to 1971-1-1.
Later, the system time was changed to increment every second, which increased the span of time that could be represented by a 32-bit...
Rails :include vs. :joins
... records.
includes - When using an association on each member of a result set.
Longer version
Joins is meant to filter the result set coming from the database. You use it to do set operations on your table. Think of this as a where clause that performs set theory.
Post.joins(:comments)
is the s...
When should you not use virtual destructors?
Is there ever a good reason to not declare a virtual destructor for a class? When should you specifically avoid writing one?
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How do you connect localhost in the Android emulator? [duplicate]
...xpect.
You can use 10.0.2.2 to access your actual machine, it is an alias set up to help in development.
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Paused in debugger in chrome?
...cripts are always paused in the debugger even if there are no break points set, and if the the pause is un-paused, it again pauses itself.
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