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Test if object implements interface
...me again for the link to the classic Double-Casting AntiPattern blog post by Julian M Bucknall.
– Jeroen Wiert Pluimers
Mar 17 '11 at 12:27
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What's the best way to share data between activities?
...ithout persisting to disk
It is possible to share data between activities by saving it in memory given that, in most cases, both activities run in the same process.
Note: sometimes, when the user leaves your activity (without quitting it), Android may decide to kill your application. In such scena...
How to add an extra source directory for maven to compile and include in the build jar?
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Plugin execution not covered by lifecycle configuration: org.codehaus.mojo:build-helper-maven-plugin:1.7:add-source (execution: add-source, phase: generate-sources) getting this error
– Katie
Sep 20 '16 at 18:00
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Which equals operator (== vs ===) should be used in JavaScript comparisons?
...they are of different types, they attempt to coerce the values. the rules by which they do that are complicated and unmemorable. These are some of the interesting cases:
'' == '0' // false
0 == '' // true
0 == '0' // true
false == 'false' // false
false == '0'...
Android preferences onclick event
...renceScreen.setEnabled(false);
// Let the intents be launched by the Preference manager
return false;
}
}
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Why does ~True result in -2?
...ws the binary arithmetic interpretation of what's going on, not the actual bytecode (which would be some sort of intermediate or operation level code compiled from the source).
– Patrick M
Feb 19 '14 at 15:53
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How to display gpg key details without importing it?
...[revoked: 2016-03-01]
sub rsa4096 2016-02-24 [A] [expires: 2020-02-23]
By setting --keyid-format 0xlong, long key IDs are printed instead of the insecure short key IDs:
$ gpg a4ff2279.asc
gpg: WARNING: no command supplied. Trying...
Running a specific test case in Django when your app has a tests directory
...opics/testing/#running-tests ) says that you can run individual test cases by specifying them:
6 Answers
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Search for string and get count in vi editor
... got the number of occurrences, you can Press N Key to see occurrences one-by-one.
For finding and counting in particular range of line number 1 to 10:
:1,10s/hello//gn
Please note, % for whole file is repleaced by , separated line numbers.
For finding and replacing in particular range ...
How to detect input type=file “change” for the same file?
... be aware that when you use .attr("value", "") or .val("") (like suggested by @wagner-leonardi below) internet explorer will fire the change event while chrome don't
– fadomire
Apr 30 '15 at 12:33
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