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Best way to give a variable a default value (simulate Perl ||, ||= )
... = $bar ?: $baz;
Which assigns $bar if it's not an empty value (I don't know how this would be different in PHP from Perl), otherwise $baz, and is the same as this in Perl and older versions of PHP:
$foo = $bar ? $bar : $baz;
But PHP does not have a compound assignment operator for this (that i...
g++ undefined reference to typeinfo
...rder may change based on votes. I don't usually refer to any other answers now since they can be deleted as well. My belief is that answers should be standalone. I still refer to user names for attribution however.
– paxdiablo
Nov 21 '08 at 1:37
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How does Apple know you are using private API?
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There are 3 ways I know. These are just some speculation, since I do not work in the Apple review team.
1. otool -L
This will list all libraries the app has linked to. Something clearly you should not use, like IOKit and WebKit can be detected...
Modifying location.hash without page scrolling
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It would be useful to know which browsers need step 2 here.
– djc
Nov 5 '10 at 9:51
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json.dumps vs flask.jsonify
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jsonify() handles lists now. See this commit.
– Jeff Widman
Jan 25 '16 at 19:14
3
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How to order events bound with jQuery
...ks - the script I write may be found in one of those blocks, but I do not know which one, that is handled by the controller.
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Inject errors into already validated form?
...collision I'd like to send the form back with an error on it, but I won't know until I actually try to do the database insert. (In theory the validator could check the database, but that smells and is race-prone.)
– Weeble
May 19 '10 at 15:53
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What is the purpose of std::make_pair vs the constructor of std::pair?
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@Tor Yeah, I know how to use both of them, I was just curious if there was a reason for std::make_pair. Apparently it is just for convenience.
– user542687
Feb 14 '12 at 1:56
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How do I get a file extension in PHP?
...uilt-in function to do that and not PHP (I am looking at Pythonistas right now :-)).
In fact, it does exist, but few people know it. Meet pathinfo():
$ext = pathinfo($filename, PATHINFO_EXTENSION);
This is fast and built-in. pathinfo() can give you other information, such as canonical path, depe...
Get current time as formatted string in Go?
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Use the time.Now() function and the time.Format() method.
t := time.Now()
fmt.Println(t.Format("20060102150405"))
prints out 20110504111515, or at least it did a few minutes ago. (I'm on Eastern Daylight Time.) There are several pre-de...