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What is the difference between LINQ ToDictionary and ToLookup
... Marc Gravell♦Marc Gravell
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Scrolling down both parts of a split-window at the same time in Vim
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edited Jun 18 '13 at 11:31
answered Jul 7 '09 at 14:37
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string.ToLower() and string.ToLowerInvariant()
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edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Nov 4 '13 at 22:05
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Error: Could not create the Java Virtual Machine Mac OSX Mavericks
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305
Normally this error occurs when you invoke java by supplying the wrong arguments/options. In t...
ruby on rails f.select options with custom attributes
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356
Rails CAN add custom attributes to select options, using the existing options_for_select helpe...
Python Requests library redirect new url
...requests
>>> response = requests.get('http://httpbin.org/redirect/3')
>>> response.history
(<Response [302]>, <Response [302]>, <Response [302]>)
>>> for resp in response.history:
... print(resp.status_code, resp.url)
...
302 http://httpbin.org/redir...
What's “requestCode” used for on PendingIntent?
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stkent
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answered Feb 3 '14 at 12:04
Minhaj ArfinMinhaj Ar...
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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