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What is the difference between required and ng-required?
What is the difference between required and ng-required (form validation)?
3 Answers
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Rails has_and_belongs_to_many migration
I have two models restaurant and user that I want to perform a has_and_belongs_to_many relationship.
4 Answers
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#include in .h or .c / .cpp?
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Put as much as you can in the .c and as little as possible in the .h. The includes in the .c are only included when that one file is compiled, but the includes for the .h have to be included by every file that uses it.
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Difference between dispatch_async and dispatch_sync on serial queue?
...k is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
printf("2");
dispatch_async(_serialQueue, ^{ printf("3"); });
printf("4");
It may print 2413 or 2143 or 1234 but 1 always before 3
for ...
Match linebreaks - \n or \r\n?
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Gonna answer in opposite direction.
2) For a full explanation about \r and \n I have to refer to this question, which is far more complete than I will post here: Difference between \n and \r?
Long story short, Linux uses \n for a new-line, Windows \r\n and old Macs \r. So there are multiple way...
Sublime Text 2: Trim trailing white space on demand
...lower
I use TrailingSpaces plugin for this.
Highlight trailing spaces and delete them in a flash.
ST2 provides a way to automatically delete trailing spaces upon file
save. Depending on your settings, it may be more handy to just
highlight them and/or delete them by hand. This plugin p...
Where's the difference between setObject:forKey: and setValue:forKey: in NSMutableDictionary?
...oking at the documentation, I hardly see any big difference. Both "value" and "object" are of type id , so can be any object. Key is once a string, and in the other case an id. One of them seems to retain the object, and the other don't. What else? Which one is for what case?
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JavaScript regex multiline flag doesn't work
...d news is that you can work around it by using a character class (e.g. \s) and its negation (\S) together, like this:
[\s\S]
So in your case the regex would become:
/<div class="box-content-5">[\s\S]*<h1>([^<]+?)<\/h1>/i
As of ES2018, JavaScript supports the s (dotAll) f...
Keystore type: which one to use?
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There are a few more types than what's listed in the standard name list you've linked to. You can find more in the cryptographic providers documentation. The most common are certainly JKS (the default) and PKCS12 (for PKCS#12 files, often with extension .p12 or sometimes .pfx).
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Infinite scrolling with React JS
... infinite scrolling with React. I have come across react-infinite-scroll and found it inefficient as it just adds nodes to the DOM and doesn't remove them. Is there any proven solution with React which will add, remove and maintains constant number of nodes in the DOM.
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