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How should one use std::optional?
...n error. For example, you need to read data from a socket, and when a data block is complete, you parse it and return it:
class YourBlock { /* block header, format, whatever else */ };
std::optional<YourBlock> cache_and_get_block(
some_socket_object& socket);
If the appended data c...
Is it good style to explicitly return in Ruby?
...ne more word. I'd prefer to see return at least in functions (maybe not in blocks) so as to express what the code actually does. Sometimes you have to return mid-function - don't leave out the last return keyword on the last line just because you can. I don't favor verbosity at all, but I favor cons...
How to allow to accept only image files?
...ttp://www.w3schools.com/tags/att_input_accept.asp
http://www.w3schools.com/php/php_file_upload.asp
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Virtual Memory Usage from Java under Linux, too much memory used
... the segment. This last item is either a file or "anon", which indicates a block of memory allocated via mmap.
Starting from the top, we have
The JVM loader (ie, the program that gets run when you type java). This is very small; all it does is load in the shared libraries where the real JVM code ...
Why is “except: pass” a bad programming practice?
...pared to recover from and only catch those.
Try to avoid passing in except blocks. Unless explicitly desired, this is usually not a good sign.
But let’s go into detail:
Don’t catch any error
When using a try block, you usually do this because you know that there is a chance of an exception b...
How to get these two divs side-by-side?
...eak when the user resizes the window. In modern browsers, display: inline-block is usually the best option.
– John Henckel
Dec 1 '16 at 19:42
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How to line-break from css, without using ?
...ello and How are you.
I suggest using spans that you will then display as blocks (just like a <div> actually).
p span {
display: block;
}
<p><span>hello</span><span>How are you</span></p>
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How To Format A Block of Code Within a Presentation? [closed]
I am preparing a presentation using Google Slides, though I can also work on the presentation within Open Office that will include code snippets.
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HTML: Include, or exclude, optional closing tags?
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Because a <P> element cannot contain block-level elements, and <P> is a block level element. From (w3.org/TR/REC-html40/struct/text.html#edef-P) "The P element represents a paragraph. It cannot contain block-level elements (including P itself)."
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How to perform Callbacks in Objective-C
...ndomly resurrected the question for me, the other (newer) option is to use blocks:
@interface MyClass: NSObject
{
void (^_completionHandler)(int someParameter);
}
- (void) doSomethingWithCompletionHandler:(void(^)(int))handler;
@end
@implementation MyClass
- (void) doSomethingWithCompletion...