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Why use apparently meaningless do-while and if-else statements in macros?
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#define BAR(X) do { \
int i = f(X); \
if (i > 4) g(i); \
} while (0)
You don't have to use do ... while, you could cook up something with if ... else as well, although when if ... else expands inside of an if ... else it leads to a "dangling else", which could make an existing dangling el...
How to get RGB values from UIColor?
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edited Mar 23 '18 at 8:00
Pang
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answered J...
Changing case in Vim
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edited Feb 19 at 1:03
Community♦
111 silver badge
answered May 31 '10 at 21:34
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Delete sql rows where IDs do not have a match from another table
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answered Aug 1 '10 at 23:23
OMG PoniesOMG Ponies
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Change values while iterating
...is behavior is demonstrated by the following code:
x := make([]int, 3)
x[0], x[1], x[2] = 1, 2, 3
for i, val := range x {
println(&x[i], "vs.", &val)
}
The code prints you completely different memory locations for the value from range and the actual
value in the slice:
0xf84000f0...
How do I make class methods / properties in Swift?
...int("There are \(all.count) foos")
}
}
Foo.alert() // There are 0 foos
let f = Foo()
Foo.all.append(f)
Foo.alert() // There are 1 foos
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How to handle multiple heterogeneous inputs with Logstash?
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Adam Michalik
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answered Dec 13 '13 at 8:24
Ben LimBen Lim
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How to install Google Play Services in a Genymotion VM (with no drag and drop support)?
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As of Genymotion 2.10.0 and onwards, GApps can be installed from the emulator toolbar.
Please refer to answer by @MichaelStoddart.
Next follows former answer kept here for historic reason:
Genymotion doesn't provide Google Apps. To install Goo...
Why can't I assign a *Struct to an *Interface?
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edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Nov 22 '12 at 11:31
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How to get the current directory in a C program?
... } else {
perror("getcwd() error");
return 1;
}
return 0;
}
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