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“var” or no “var” in JavaScript's “for-in” loop?

What's the correct way to write a for-in loop in JavaScript? The browser doesn't issue a complaint about either of the two approaches I show here. First, there is this approach where the iteration variable x is explicitly declared: ...
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Should I use Java's String.format() if performance is important?

...d representation of all string formatting. Often there's logic involved in what to include and logic to format specific values into strings. Any real test should look at real-world scenarios. – Orion Adrian Feb 10 '09 at 17:27 ...
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What does the regular expression /_/g mean?

....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f6052616%2fwhat-does-the-regular-expression-g-mean%23new-answer', 'question_page'); } ); Post as a guest ...
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Google Maps API - Get Coordinates of address

... What you are looking for is called Geocoding. Google provides a Geocoding Web Service which should do what you're looking for. You will be able to do geocoding on your server. JSON Example: http://maps.google.com/maps/a...
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How to export a Vagrant virtual machine to transfer it

...l be completed during provisioning of the new vagrant box (via Chef/Puppet/what-have-you). – Hovis Biddle Apr 4 '16 at 0:50 2 ...
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How do you unit test a Celery task?

...etely synchronous and should be the one that makes sure the algorithm does what it should do. The second session uses the whole system (including the broker) and makes sure I'm not having serialization issues or any other distribution, comunication problem. So: from celery import Celery celery = ...
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What does java:comp/env/ do?

... what if there are more /-es in your lookup? Like: "java:com/env/foo/bar", is your jndiName value "foo/bar" or "foo.bar"? – Pieter De Bie Jun 5 '15 at 7:15 ...
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How are software license keys generated?

...Obscurity , although I really have no idea how license keys are generated. What is a good (secure) example of license key generation? What cryptographic primitive (if any) are they using? Is it a message digest? If so, what data would they be hashing? What methods do developers employ to make it dif...
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Are lists thread-safe?

...they themselves don't go corrupt, but their data may. collections.deque is what's behind Queue.Queue objects. If you're accessing things from two threads, you really should use Queue.Queue objects. Really. – Thomas Wouters Jun 12 '11 at 0:09 ...
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Regular Expression for alphanumeric and underscores

...or ^\w+$). Note that in other languages, and by default in .NET, \w is somewhat broader, and will match other sorts of Unicode characters as well (thanks to Jan for pointing this out). So if you're really intending to match only those characters, using the explicit (longer) form is probably best. ...