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JavaScript “new Array(n)” and “Array.prototype.map” weirdness
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@TrevNorris, you can easily test that with hasOwnProperty unless hasOwnProperty itself has a bug: (new Array(1)).hasOwnProperty(0) === false and [undefined].hasOwnProperty(0) === true. In fact, you can do the exact same with in: 0 in [undefined] === tru...
Checking if an object is null in C#
... Luca, you can also avoid equality overrides by casting to 'object' in the test. On a similar vein, this answer should claim this instead: "if((object)data != null)" since it avoids errors when equality has been overriden.
– DAG
Mar 11 '18 at 20:16
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Google Guava isNullOrEmpty for collections
...ons.collection the methods isEmpty() and isNotEmpty() still exist in the latest version. collections15.CollectionUtils seems like an independent project trying to provide generic support.
– proko
Aug 13 '12 at 13:18
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Handlebars/Mustache - Is there a built in way to loop through the properties of an object?
... {{this}}
{{/each}}
Note that only properties passing the hasOwnProperty test will be enumerated.
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How to exit from Python without traceback?
...ystemExit:
import os
os._exit(1)
I do this, in code that runs under unittest and calls fork(). Unittest gets when the forked process raises SystemExit. This is definitely a corner case!
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What is the $$hashKey added to my JSON.stringify result
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Are there any performance tests about «track by» vs «$$hashKey»? (UPD. Ok, I've googled it and «track by» is more preferrable)
– artuska
Sep 17 '15 at 14:25
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Build Error - missing required architecture i386 in file
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in additionally, test it on iOS Device instead of Simulator.
– Raptor
Nov 1 '11 at 9:51
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How do I use PHP namespaces with autoload?
...the sub directory for each namespace you are defined.
File: /ProjectRoot/test.php
define('BASE_PATH', realpath(dirname(__FILE__)));
function my_autoloader($class)
{
$filename = BASE_PATH . '/lib/' . str_replace('\\', '/', $class) . '.php';
include($filename);
}
spl_autoload_register('my_a...
How can I wrap text in a label using WPF?
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Yes, this does work—I tested it before I published my answer. You are right in that the elements targeted are not in the logical tree, but it's the visual tree that matters here.
– PaulJ
Aug 16 '13 at 13:15
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Where can I find the Java SDK in Linux after installing it?
...m/java-8-oracle/bin/javac. That bin folder is NOT a JDK. General acid-base test to see if its a JDK is to see if the current $JAVA_HOME contains a path of lib/tools.jar . In the cast of /usr/lib/jvm/java-8-oracle/bin that is not true, therefore it is not a JDK.
– Zombies
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