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When is it better to use an NSSet over an NSArray?
...he collection.
The reason is that a set uses hash values to find items (like a dictionary) while an array has to iterate over its entire contents to find a particular object.
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Unsigned keyword in C++
Does the unsigned keyword default to a specific data type in C++? I am trying to write a function for a class for the prototype:
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Good tutorial for using HTML5 History API (Pushstate?) [closed]
I am looking into using the HTML5 History API to resolve deep linking problems with AJAX loaded content, but I am struggling to get off the ground. Does any one know of any good resources?
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oh-my-zsh slow, but only for certain Git repo
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You can add this to your git config and zsh won't check the status anymore
git config --add oh-my-zsh.hide-status 1
git config --add oh-my-zsh.hide-dirty 1
Explanation
There are two central git functions in in lib/git.zsh:
git_prompt_info()
parse_git_dirty()
Each M...
How to check Oracle database for long running queries
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and s.username <> 'SYSTEM'
order by s.sid,t.piece
/
This shows locks. Sometimes things are going slow, but it's because it is blocked waiting for a lock:
select
object_name,
object_type,
session_id,
type, -- Type or system/user lock
lmode, -- lock mode in which...
How can I perform a `git pull` without re-entering my SSH password?
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Have a look at this link https://help.github.com/articles/working-with-ssh-key-passphrases/
But I don’t want to enter a long passphrase every time I use the key!
Neither do I! Thankfully, there’s a nifty little tool called...
Mac OS X Terminal: Map option+delete to “backward delete word”
Tried to map it from Preferences -> Settings -> Keyboard, but the "key" combo box has only "forward delete" but no "delete". My keyboard on the other hand has only "delete" and no "forward delete"!
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“Could not load type [Namespace].Global” causing me grief
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mezoid
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answered May 21 '11 at 0:34
stantonastanton...
How can I use Timer (formerly NSTimer) in Swift?
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This will work:
override func viewDidLoad() {
super.viewDidLoad()
// Swift block syntax (iOS 10+)
let timer = Timer(timeInterval: 0.4, repeats: true) { _ in print("Done!") }
// Swift >=3 selector syntax
let timer ...
Database Design for Revisions?
...or attribute. This just causes problems down the line, requires surrogate keys and all sorts of other problems.
Design 2 does have problems with schema changes. If you change the Employees table you have to change the EmployeeHistories table and all the related sprocs that go with it. Potentially...