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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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How to update bower.json with installed packages?
...this bower.json). This will be an issue if someone remove angular-animate from bower.json in which case bower will not install angular too since its not listed.
– Aakash
Apr 25 '16 at 6:32
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How to do associative array/hashing in JavaScript
...two"] = "Second";
associativeArray["three"] = "Third";
If you are coming from an object-oriented language you should check this article.
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How to loop through a plain JavaScript object with the objects as members?
...for (var key in validation_messages) {
// skip loop if the property is from prototype
if (!validation_messages.hasOwnProperty(key)) continue;
var obj = validation_messages[key];
for (var prop in obj) {
// skip loop if the property is from prototype
if (!obj.hasOwnPro...
Why does python use 'else' after for and while loops?
...p has values unless a break statement is explicity run as in this example. From the docs above: "The else clause has another perceived problem: if there is no break in the loop, the else clause is functionally redundant.". e.g. for x in [1, 2, 3]:\n print x\n else:\n print 'this executes due to no b...
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 delete migration files in Rails 3
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Run below commands from app's home directory:
rake db:migrate:down VERSION="20140311142212" (here version is the timestamp prepended by rails when migration was created. This action will revert DB changes due to this migration)
Run "rails des...
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...
Where is my .vimrc file?
...s, settings in the user vimrc will override settings in the system vimrc.
From :help vimrc:
A file that contains initialization commands is called a "vimrc" file.
Each line in a vimrc file is executed as an Ex command line. It is
sometimes also referred to as "exrc" file. They are the sam...
What is console.log?
...com/ type :listen and it will give you a script tag to place in your HTML. From then on you can view your console inside the jsconsole website.
iOS and Android
You can also use http://html.adobe.com/edge/inspect/ to access web inspector tools and the console on any device using their convenient br...