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What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
...t falsey values are also legal, since the || operator can't tell undefined from falsey.
– Alnitak
Jun 26 '11 at 14:02
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How to run a single RSpec test?
...y_spec.rb -e "should be the correct answer"
2019 Update: Rspec2 switched from the 'spec' command to the 'rspec' command.
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How can I convert immutable.Map to mutable.Map in Scala?
...utable.Map varargs factory. Unlike the ++ approach, this uses the CanBuildFrom mechanism, and so has the potential to be more efficient if library code was written to take advantage of this:
val m = collection.immutable.Map(1->"one",2->"Two")
val n = collection.mutable.Map(m.toSeq: _*)
Th...
When should I use Debug.Assert()?
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From Code Complete
8 Defensive Programming
8.2 Assertions
An assertion is code that’s used during development—usually a routine
or macro—that allows a program to check itself as it runs. When an
assertion is true, that...
PHP Sort a multidimensional array by element containing date
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From php7 you can use the Spaceship operator:
usort($array, function($a, $b) {
return new DateTime($a['datetime']) <=> new DateTime($b['datetime']);
});
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Android Bitmap to Base64 String
...yte[] byteArray = byteArrayOutputStream .toByteArray();
to encode base64 from byte array use following method
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
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Calendar date to yyyy-MM-dd format in java
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Anyway to remove timezone completely from from this calender object?
– Sarika.S
Sep 25 '12 at 5:24
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How to get file_get_contents() to work with HTTPS?
...t and it still doesn't work. And allow_url_fopen. Only non https urls work from localhost.
– Curtis
Dec 24 '19 at 4:55
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How to check a not-defined variable in JavaScript
...mm... I just noticed the "source" link: this entire post is a direct quote from a mailing list, & should probably be edited to make that more clear, as the original author is not available to clarify.
– Jason S
May 13 '09 at 15:46
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What does the plus sign do in '+new Date'
...to get the numeric value of that object using valueOf() like we get string from toString()
new Date().valueOf() == (+new Date) // true
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