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How should one use std::optional?
...archy, instead of passing around some "phantom" value "assumed" to have a "error" meaning.
– Luis Machuca
Oct 3 '13 at 16:35
1
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How to terminate a Python script
...ally
underdeveloped; Unix programs generally use 2 for command line syntax
errors and 1 for all other kind of errors. If another type of object
is passed, None is equivalent to passing zero, and any other object is
printed to stderr and results in an exit code of 1. In particular,
sys.exit("some err...
Macro vs Function in C
...
Macros are error-prone because they rely on textual substitution and do not perform type-checking. For example, this macro:
#define square(a) a * a
works fine when used with an integer:
square(5) --> 5 * 5 --> 25
but does ve...
Callback functions in Java
...hat simple
public interface myCallback {
void onSuccess();
void onError(String err);
}
now to make this callback run when ever you wish to do to handle the results - more likely after async call and you wanna run some stuff which depends on these reuslts
// import the Interface class her...
How do you round a floating point number in Perl?
.... For rounding to a certain number of digits, sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
func...
Import regular CSS file in SCSS file?
...uby sass v3.4.18 (with Jekyll) according to my Gemfile.lock. Still seeing Error: File to import not found or unreadable: cssdep/cssfile. If I create a cssdep/cssfile.scss it suddenly works. So not a path issue, for some reason I still can't include '.css' files from SASS :(
–...
How to pass command line arguments to a rake task
...don't do this: rake thing:work[1, 2, 3] as it won't work and you'll get an error Don't know how to build task
– rpbaltazar
Sep 29 '16 at 11:30
10
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What are the benefits of Java's types erasure?
...teger> collection) {
}
void doStuff(List<String> collection) // ERROR: a method cannot have
// overloads which only differ in type parameters
(The above two declarations collapse into the same method signature after erasure.)
On the flip side, the runtime can still ...
Most efficient method to groupby on an array of objects
...
There's a reference error on your code in jsBin.
– Rod Talingting
Jul 20 at 22:37
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How can I disable HREF if onclick is executed?
...tn-loading is added to the clicked link, then if successful a checkmark(on error an X) replaces the loading animation. I don't want the button to be able to be clicked again in some instances(for both success and error), using this I can simply $(elemnent).addClass('disabled') and easily achieve the...