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NullPointerException in Java with no StackTrace
...of exceptions)?
– Edward Shtern
Jun 11 '10 at 17:48
There are no hidden gotchas that I know of. When you look at the H...
Is an empty href valid?
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Community♦
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answered Apr 11 '17 at 8:04
unorunor
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grep output to show only matching file
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answered Oct 11 '10 at 16:37
a'ra'r
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Check whether a string is not null and not empty
...e as well:
if(str != null && !str.trim().isEmpty())
(since Java 11 str.trim().isEmpty() can be reduced to str.isBlank() which will also test for other Unicode white spaces)
Wrapped in a handy function:
public static boolean empty( final String s ) {
// Null-safe, short-circuit evaluat...
Run JavaScript when an element loses focus
...navarCanavar
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Javascript set img src
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edited Mar 13 '19 at 11:22
Josef
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answered Jun 19 '14 at 11:17
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Get index of element as child relative to parent
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edited Aug 19 '13 at 11:51
Dan Atkinson
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Reducing MongoDB database file size
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As of today (2010-11-18) Dwight (speaking at the MongoDC event in Washington, DC) recommended the replicate / --repair / switch over approach if you want to compact without taking your database offline.
– David J.
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Detect if value is number in MySQL
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edited Feb 21 '11 at 11:44
answered Feb 21 '11 at 10:47
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Test for equality among all elements of a single vector
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edited Jan 21 '11 at 17:25
answered Jan 20 '11 at 21:06
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