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Why is January month 0 in Java Calendar?
...e. I doubt whether anyone outside the original implementation team could really state reasons - but again, I'd urge readers not to worry so much about why bad decisions were taken, as to look at the whole gamut of nastiness in java.util.Calendar and find something better.
One point which is in favo...
Cloning an Object in Node.js
... This is the WRONG answer. As per node's documentation: nodejs.org/api/util.html#util_util_extend_obj The util._extend() method was never intended to be used outside of internal Node.js modules. The community found and used it anyway. It is deprecated and should not be used in new code. Ja...
Ruby convert Object to Hash
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instance_values can be used for all ruby objects for the similar output.
– bishal
Jan 22 '19 at 11:37
add a comment
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“Debug certificate expired” error in Eclipse Android plugins
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Upon installation, the Android SDK generates a debug signing certificate for you in a keystore called debug.keystore. The Eclipse plug-in uses this certificate to sign each application build that is generated.
Unfortunately a debug ...
How to get the first column of a pandas DataFrame as a Series?
...c wasn't there yet back then. In 2016, the correct answer is Jeff's (after all he's pandas God, mind you ;-)). I'm not sure what's SO's policy regarding update of answers due to API change; I'm honestly surprised by the number of votes for this answer, didn't think it was that useful to people...
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Should I implement __ne__ in terms of __eq__ in Python?
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this is the right answer (down here, by @aaron-hall). The documentation you quoted does not encourage you to implement __ne__ using __eq__, only that you implement it.
– guyarad
Sep 8 '16 at 13:07
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Cross field validation with Hibernate Validator (JSR 303)
... fields; cross-field validation should be done at the class level. Additionally, the JSR-303 Section 2.2 preferred way to express multiple validations of the same type is via a list of annotations. This allows the error message to be specified per match.
For example, validating a common form:
@F...
“Deprecation warning: moment construction falls back to js Date” when trying to convert RFC2822 date
...Date('Wed, 23 Apr 2014 09:54:51 +0000'));
The last option is a built-in fallback that Moment supports for now, with the deprecated console warning. They say they won't support this fallback in future releases. They explain that using new Date('my date') is too unpredictable.
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mongodb count num of distinct values per field/key
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Here is example of using aggregation API. To complicate the case we're grouping by case-insensitive words from array property of the document.
db.articles.aggregate([
{
$match: {
keywords: { $not: {$size: 0} }
}
},
{ $unw...
Specifying an Index (Non-Unique Key) Using JPA
...k: org.eclipse.persistence.annotations.Index;
DataNucleus: org.datanucleus.api.jpa.annotations.Index;
Carbonado (GitHub): com.amazon.carbonado.Index;
EBean: com.avaje.ebean.annotation.Index or io.ebean.annotation.Index ?
Ujorm: Annotation org.ujorm.orm.annot.Column, index and uniqueIndex properties;...