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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)
...= 2
// The type here is "Implicitly Unwrapped Optional Int"
var z: Int! = 3
Usage:
// you can add x and z
x + z == 4
// ...but not x and y, because y needs to be unwrapped
x + y // error
// to add x and y you need to do:
x + y!
// but you *should* do this:
if let y_val = y {
x + y_val
}
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What are all the common ways to read a file in Ruby?
...2.0.0).
– chbrown
Jan 12 '15 at 22:53
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Table Naming Dilemma: Singular vs. Plural Names [closed]
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answered Dec 3 '08 at 19:31
community wiki
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How to PUT a json object with an array using curl
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jscs
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answered Mar 15 '13 at 14:02
Daniel Stenbe...
MYSQL OR vs IN performance
...000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it was 6 years ago, though it returns a result in the same range as this test)
In request for some sample code to test this, h...
How to get current page URL in MVC 3
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You could use the Request.RawUrl, Request.Url.OriginalString, Request.Url.ToString() or Request...
File I/O in Every Programming Language [closed]
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How do you create a Swift Date object?
...u can use that.
let someDateTime = Date(timeIntervalSinceReferenceDate: -123456789.0) // Feb 2, 1997, 10:26 AM
Method 2
Of course, it would be easier to use things like years, months, days and hours (rather than relative seconds) to make a Date. For this you can use DateComponents to specify the co...
What is the best way to call a script from another script?
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Accessing UI (Main) Thread safely in WPF
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