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Is it possible to make a type only movable and not copyable?
...which can be very bad if they have destructors, e.g.
{
let v: Vec<u8> = vec![1, 2, 3];
let w: Vec<u8> = v;
} // destructors run here
If w was just a plain byte copy of v then there would be two vectors pointing at the same allocation, both with destructors that free it... caus...
Select statement to find duplicates on certain fields
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840
To get the list of fields for which there are multiple records, you can use..
select field1,fi...
Sharing link on WhatsApp from mobile website (not application) for Android
...sapp</a>
Rechecked it today (17th April 2015):
Works for me on iOS 8 (iPhone 6, latest versions) Android 5 (Nexus 5, latest versions).
It also works on Windows Phone.
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Find out whether Chrome console is open
...or historical context. Currently Muhammad Umer's approach works on Chrome 78, with the added advantage of detecting both close and open events.
function toString (2019)
Credit to Overcl9ck's comment on this answer. Replacing the regex /./ with an empty function object still works.
var devtools =...
Can I record/play macros in Visual Studio 2012/2013/2015/2017/2019?
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178
+100
You can ...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
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Mason Wan
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answered Sep 9 '08 at 0:50
ReadonlyReadonly
2...
What are the mechanics of short string optimization in libc++?
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answered Feb 11 '14 at 18:25
Howard HinnantHoward Hinnant
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How to check if element is visible after scrolling?
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answered Jan 28 '09 at 15:36
Scott DowdingScott Dowding
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Following git-flow how should you handle a hotfix of an earlier release?
...ellbourn
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Is there documentation for the Rails column types?
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Guidelines built from personal experience:
String:
Limited to 255 characters (depending on D...