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Swift make method parameter mutable?
...eclare an inout parameter. Think: passing in a pointer.
func reduceToZero(_ x: inout Int) {
while (x != 0) {
x = x-1
}
}
var a = 3
reduceToZero(&a)
print(a) // will print '0'
This can be particularly useful in recursion.
Apple's inout declaration guidelines can be found...
What would cause an algorithm to have O(log n) complexity?
...er dividing n in half i times we'll have a value that is at most 1. The smallest i for which this is guaranteed is roughly log2 n, so if we have an algorithm that divides by 2 until the number gets sufficiently small, then we can say that it terminates in O(log n) steps.
An important detail is tha...
Most popular screen sizes/resolutions on Android phones [closed]
...
Here is a list of almost all resolutions of tablets, with the most common ones in bold :
2560X1600
1366X768
1920X1200
1280X800
1280X768
1024X800
1024X768
1024X600
960X640
960X540
854X480
800X600
800X480
800X400
Happy designing .. ! :)
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Difference between author and committer in Git?
...ld find was using the environment variables to override the committer:
GIT_COMMITTER_NAME='a' GIT_COMMITTER_EMAIL='a' git commit --author 'a <a>'
How to get the committer and commit date of a given commit?
Only author data shows by default on git log.
To see the committer date you can eit...
Maximum single-sell profit
...oblem in each subarray, then combining the two together. Turns out we actually can do this, and can do so efficiently! The intuition is as follows. If we have a single day, the best option is to buy on that day and then sell it back on the same day for no profit. Otherwise, split the array into ...
Why does Vim save files with a ~ extension?
...
Actually - do I have to have both nobackup and nowritebackup? Is there a way to write a copy of the file as a backup, but not do this write/delete/rename stuff?
– Merlyn Morgan-Graham
Mar 2...
Cannot push to Git repository on Bitbucket
...ent every time you run GitBash:
$ cat ~/.bashrc
If you see a function called start_agent, this step has already been completed.
If no file, continue.
If there is a file that does not contain this function, you're in a sticky situation. It's probably safe to append to it (using the instructions ...
Unable to open project… cannot be opened because the project file cannot be parsed
...
this should be marked as the answer. Really good stuff, thanks
– owen gerig
May 10 '13 at 15:10
12
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Get list of all tables in Oracle?
How do I query an Oracle database to display the names of all tables in it?
23 Answers
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Django: accessing session variables from within a template?
...ple are still finding it helpful, more than three years after it was originally written. Please note however, that although the view code above is still valid, nowadays there is a much simpler way of doing this. render() is a function very similar to render_to_response(), but it uses RequestContext ...