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Is null check needed before calling instanceof?
...nstanceof.
The expression x instanceof SomeClass is false if x is null.
From the Java Language Specification, section 15.20.2, "Type comparison operator instanceof":
"At run time, the result of the
instanceof operator is true if the
value of the RelationalExpression is
not null and the...
Java - get the current class name?
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Weird isn't the super class the class you are inheriting from? Handler is not Inheriting form my class, it's just a member
– aryaxt
Jun 7 '11 at 21:15
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Only variables should be passed by reference
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save the array from explode() to a variable, and then call end() on this variable:
$tmp = explode('.', $file_name);
$file_extension = end($tmp);
btw: I use this code to get the file extension:
$ext = substr( strrchr($file_name, '.'), 1)...
How to force ASP.NET Web API to always return JSON?
...n't see a "config" object in my Global.asax. Where is that variable coming from? the article doesn't explain either.
– BuddyJoe
Aug 13 '13 at 23:38
3
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Take a screenshot of a webpage with JavaScript?
...e worth a try. It's a drop in solution to get accurate browser screenshots from your visitors without installing a plugin (and no Java, ActiveX or Flash whatsoever).
– Gregor
Jun 19 '13 at 15:37
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In Rails - is there a rails method to convert newlines to ?
...ome, but one with a definitive "Nope." at the beginning discourages people from looking any further.
– cesoid
Aug 25 '14 at 19:38
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Any way to declare an array in-line?
...tion syntax is very succinct and flexible. I use it a LOT to extract data from my code and place it somewhere more usable.
As an example, I've often created menus like this:
Menu menu=initMenus(menuHandler, new String[]{"File", "+Save", "+Load", "Edit", "+Copy", ...});
This would allow me to wr...
Exit Shell Script Based on Process Exit Code
... echo ${PIPESTATUS[*]}
1 0 1
If you wanted to get the largest error code from a pipeline, you could use something like:
true | true | false | true | false
rcs=${PIPESTATUS[*]}; rc=0; for i in ${rcs}; do rc=$(($i > $rc ? $i : $rc)); done
echo $rc
This goes through each of the PIPESTATUS eleme...
How to iterate a loop with index and element in Swift
...his array I wanted to filter odd or even indexed elements and convert them from Ints to Doubles. So enumerate() gets you index and the element, then filter checks the index, and finally to get rid of the resulting tuple I map it to just the element.
let evens = arrayOfValues.enumerate().filter({
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How do I create an empty array in YAML?
...] or {} structures, which is a major incompatibility with JSON (copy-paste from Wikipedia) Cheers
– olibre
Feb 12 '13 at 10:51
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