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Qt: How do I handle the event of the user pressing the 'X' (close) button?
... to the event of "the user clicking the 'X'(close) button of the window frame" i.e. this button:
4 Answers
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Are there strongly-typed collections in Objective-C?
... Objective-C. In C# and Java we have "generics", collection classes whose members can only be of the type declared. For example, in C#
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ruby system command check exit code
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From the documentation:
system returns true if the command gives zero exit status, false for
non zero exit status. Returns nil if command execution fails.
system("unknown command") #=> nil
system("echo foo") #=&g...
Are Mutexes needed in javascript?
I have seen this link: Implementing Mutual Exclusion in JavaScript .
On the other hand, I have read that there are no threads in javascript, but what exactly does that mean?
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What are the underlying data structures used for Redis?
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I'll try to answer your question, but I'll start with something that may look strange at first: if you are not interested in Redis internals you should not care about how data types are implemented internally. This is for a simple reason: for every Redis operation you'll find the ...
Recommended SQL database design for tags or tagging [closed]
I've heard of a few ways to implement tagging; using a mapping table between TagID and ItemID (makes sense to me, but does it scale?), adding a fixed number of possible TagID columns to ItemID (seems like a bad idea), Keeping tags in a text column that's comma separated (sounds crazy but could work)...
HTML anchor link - href and onclick both?
I want to author an anchor tag that executes some JavaScript and then proceeds to go wherever the href was taking it. Invoking a function that executes my JavaScript and then sets window.location or top.location to the href location doesn't work for me.
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Flatten List in LINQ
I have a LINQ query which returns IEnumerable<List<int>> but i want to return only List<int> so i want to merge all my record in my IEnumerable<List<int>> to only one array.
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JavaScript check if variable exists (is defined/initialized)
Which method of checking if a variable has been initialized is better/correct?
(Assuming the variable could hold anything (string, int, object, function, etc.))
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Trying to embed newline in a variable in bash [duplicate]
...line $var ) # Do not use double quotes "$var"
echo "$p"
Output is the same for all
a
b
c
Special thanks to contributors of this answer: kevinf, Gordon Davisson, l0b0, Dolda2000 and tripleee.
EDIT
See also BinaryZebra's answer providing many details.
Abhijeet Rastogi's answer and Dimitry's...