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Double not (!!) operator in PHP
...ings or empty arrays) you will get the boolean value FALSE.
It is functionally equivalent to a cast to boolean:
return (bool)$row;
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Conditionally ignoring tests in JUnit 4
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@notnoop, that isn't my observation at all. They are ignored. The IDEA test runner reports them that way, and a look at the JUnit source code shows that it reports the test as ignored.
– Yishai
Nov 6 '09 at 18:21
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Django 1.7 - makemigrations not detecting changes
... may happen due to the following reasons:
You did not add the app in INSTALLED_APPS list in settings.py
(You have to add either the app name or the dotted path to the subclass of AppConfig in apps.py in the app folder, depending on the version of django you are using). Refer documentation: INST...
How to get a DOM Element from a JQuery Selector
...h:
$("table").get(0);
or more simply:
$("table")[0];
There isn't actually a lot you need this for however (in my experience). Take your checkbox example:
$(":checkbox").click(function() {
if ($(this).is(":checked")) {
// do stuff
}
});
is more "jquery'ish" and (imho) more concise. W...
Unable to create a constant value of type Only primitive types or enumeration types are supported in
...I'm concerned about performance I should avoid doing this as it would load all data in memory first and then query it. Should I write raw sql for this scenarios?
– Arvand
Dec 28 '15 at 11:30
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List vs Set vs Bag in NHibernate
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NHibernate semantics:
List: Ordered collection of entities, duplicate allowed. Use a .NET IList in code. The index column will need to be mapped in NHibernate.
Set: Unordered collection of unique entities, duplicates not allowed. Use Iesi.Collection.ISet in code (NH prior to v4) or System.Colle...
Parsing IPv6 extension headers containing unknown extensions
... you don't know how to interpret.
Routers can route such packets, because all they need is the routing header. Deep packet inspection gadgets and suchlike need to know a lot, but then that's their fate anyway.
Edited to add: This design means that middleboxes can only change what they know. If a m...
Prompt for user input in PowerShell
... Thanks, @Rynant. Accepted answer for being the only one who actually answered my main question! ;) All the other information is really helpful too, especially as I'm still groping my way in PS.
– AJ.
Nov 23 '11 at 12:38
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Why does git revert complain about a missing -m option?
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By default git revert refuses to revert a merge commit as what that actually means is ambiguous. I presume that your HEAD is in fact a merge commit.
If you want to revert the merge commit, you have to specify which parent of the merge you want to consider to be the main trunk, i.e. what you want...
git: Apply changes introduced by commit in one repo to another repo
...om, and generate patches from commits you want with git format-patch
Optionally, copy patches (0001-* etc.) to your repository
Use git am --3way to apply patches
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