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Javascript: Extend a Function
...ook like this:
function init(){
doSomething();
}
//anytime later
var old_init = init;
init = function() {
old_init.apply(this, arguments);
doSomethingHereToo();
};
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Force line-buffering of stdout when piping to tee
Usually, stdout is line-buffered. In other words, as long as your printf argument ends with a newline, you can expect the line to be printed instantly. This does not appear to hold when using a pipe to redirect to tee .
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Golang production web application configuration
... timeout server 50000
frontend http
bind :80
acl is_stats hdr(host) -i hastats.myapp.com
use_backend stats if is_stats
default_backend myapp
capture request header Host len 20
capture request h...
Cannot create an array of LinkedLists in Java…?
...nto it. ArrayList will index faster, but Fredrik's solution is better overall.
– Steve Zobell
Mar 9 '17 at 20:08
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How do I show/hide a UIBarButtonItem?
...
Save your button in a strong outlet (let's call it myButton) and do this to add/remove it:
// Get the reference to the current toolbar buttons
NSMutableArray *toolbarButtons = [self.toolbarItems mutableCopy];
// This is how you remove the button from the toolbar and ...
Bash foreach loop
... input runs the cat program with the input lines as argument(s).
If you really want to do this in a loop, you can:
for fn in `cat filenames.txt`; do
echo "the next file is $fn"
cat $fn
done
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Is System.nanoTime() completely useless?
...cific counter. Now consider the following case I use to measure time of a call:
15 Answers
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What version of javac built my jar?
...ersion the class has been compiled FOR, not what version compiled it. Java allows you to compile code so that they're compatible with earlier versions of Java. However, this only applies to byte code and format. It will happily compile code that references JDK 6 libraries into a JDK 5 format, for ex...
Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...able of a class with the mutable keyword. As far as I can see it simply allows you to modify a variable in a const method:
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Check that Field Exists with MongoDB
So I'm attempting to find all records who have a field set and isn't null.
4 Answers
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