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How do you clear a slice in Go?
...definition of 'clear'. One of the valid ones certainly is:
slice = slice[:0]
But there's a catch. If slice elements are of type T:
var slice []T
then enforcing len(slice) to be zero, by the above "trick", doesn't make any element of
slice[:cap(slice)]
eligible for garbage collection. This ...
C++: How to round a double to an int? [duplicate]
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add 0.5 before casting (if x > 0) or subtract 0.5 (if x < 0), because the compiler will always truncate.
float x = 55; // stored as 54.999999...
x = x + 0.5 - (x<0); // x is now 55.499999...
int y = (int)x; // truncated...
Find the host name and port using PSQL commands
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60
The default PostgreSQL port is 5432. The host that the database is operating on should have bee...
How do you specify a different port number in SQL Management Studio?
I am trying to connect to a Microsoft SQL 2005 server which is not on port 1433. How do I indicate a different port number when connecting to the server using SQL Management Studio?
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Merging two images in C#/.NET
Simple idea: I have two images that I want to merge, one is 500x500 that is transparent in the middle the other one is 150x150.
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Can you make just part of a regex case-insensitive?
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answered Sep 4 '08 at 12:35
EspoEspo
38.7k2020 gold badges126126 silver badges156156 bronze badges
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Will using goto leak variables?
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210
Warning: This answer pertains to C++ only; the rules are quite different in C.
Won't x be ...
Xcode doesn't show the line that causes a crash
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301
You should also ensure that you have breakpoints set for all exceptions. This will cause Xcode...
How do you round a float to two decimal places in jruby
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answered May 5 '12 at 16:06
steenslagsteenslag
71.2k1414 gold badges126126 silver badges157157 bronze badges
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Join strings with a delimiter only if strings are not null or empty
...ple:
[...].filter(x => typeof x === 'string' && x.length > 0)
will only keep non-empty strings in the list.
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(obsolete jquery answer)
var address = "foo";
var city;
var state = "bar";
var zip;
text = $.grep([address, city, state, zip], Boolean).join(", "); // foo, bar
...