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Pure JavaScript: a function like jQuery's isNumeric() [duplicate]
...on of this is actually the best answer here. I find it odd that it has the least up-votes. I thought at first that it might fail if IsNumeric was called with NaN, but due to the quirk of NaN that it's not equal to anything it actually works out fine.
– Thor84no
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Visual Studio: Is there a way to collapse all items of Solution Explorer?
...t to know it because, today I have a solution with 6 projects that have at least two hundred files and if I try to collapse them one-by-one I will have a hard time.
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AttributeError: 'module' object has no attribute 'tests'
...rt. This makes sense because the test suite can't import a broken test. At least I think this is what is going on because I fixed the import within my test file and sure enough it started working.
To validate your test case just try import the test case file in python console.
Example:
from proj...
TypeScript, Looping through a dictionary
...rget(key); /* Use key, value here */ });. If you must show this method, at least mention the risks and better alternatives for those who don't yet know better.
– Yona Appletree
Apr 13 '16 at 0:08
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?
...ed on Debian based linux systems. Red Hat-ish Linux systems use rpm (or at least they did many, many, years ago). yum is also a package manager for RedHat based systems.
Alpine based systems use apk.
Warning
As of 25 April 2016, homebrew opts the user in to sending analytics by default. This can be...
How to use a wildcard in the classpath to add multiple jars? [duplicate]
...rrounding double quotes) instead of just * for this to work (on Windows at least). :)
– Amos
Jan 27 '11 at 16:49
3
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How do I check whether a jQuery element is in the DOM?
...the DOM, then $foo.parent().length === 0. Otherwise, its length will be at least 1.
[Edit: This is not entirely correct, because a removed element can still have a parent; for instance, if you remove a <ul>, each of its child <li>s will still have a parent. Use SLaks' answer instead.
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How to access java-classes in the default-package?
...fact, you can.
Using reflections API you can access any class so far. At least I was able to :)
Class fooClass = Class.forName("FooBar");
Method fooMethod = fooClass.getMethod("fooMethod", String.class);
String fooReturned = (String)fooMethod.invoke(fooClass.newInstance(), "I did it");
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WPF: How to programmatically remove focus from a TextBox
I want to add a simple (at least I thought it was) behaviour to my WPF TextBox .
9 Answers
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How to find whether or not a variable is empty in Bash
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In Bash at least the following command tests if $var is empty:
if [[ -z "$var" ]]; then
# Do what you want
fi
The command man test is your friend.
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