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Appropriate hashbang for Node.js scripts
...
If your script is intended for use by Node developers, you should absolutely just use
#!/usr/bin/env node
and not bother trying for compatibility with people who only have Node installed as nodejs.
Rationale:
It's what the cool kids are doing, and if you...
Disable developer mode extensions pop up in Chrome
...sions, check Developer mode and click Pack extension
Install the extension by dragging and dropping the .crx file into the chrome://extensions page.
You'll get an "Unsupported extensions disabled" popup if you try restarting Chrome at this point.
Then for Windows 7 or Windows 8:
Download Chrome...
Java abstract interface
...abstract interface?
No, same rules apply. The method must be implemented by any (concrete) implementing class.
If abstract is obsolete, why is it included in Java? Is there a history for abstract interface?
Interesting question. I dug up the first edition of JLS, and even there it says "This...
Types in MySQL: BigInt(20) vs Int(20)
... http://dev.mysql.com/doc/refman/8.0/en/numeric-types.html
INT is a four-byte signed integer.
BIGINT is an eight-byte signed integer.
They each accept no more and no fewer values than can be stored in their respective number of bytes. That means 232 values in an INT and 264 values in a BIGINT...
Change the name of the :id parameter in Routing resources for Rails
...ram: :slug
# app/controllers/posts_controller.rb
# ...
@post = Post.find_by(slug: params[:slug])
# ...
As of the release of Rails 4, this functionality is documented in the Rails Guides.
Rails 3
Unfortunately, in Rails 3, the :key option for resources was removed, so you can no longer easily c...
Python: using a recursive algorithm as a generator
... permutation
flatten allows us to continue progress in another generator by simply yielding it, instead of iterating through it and yielding each item manually.
Python 3.3 will add yield from to the syntax, which allows for natural delegation to a sub-generator:
def getPermutations(string, pre...
How to indicate param is optional using inline JSDoc?
...h, otherwise the argument won't be marked as optional (even if it preceded by already optional arguments):
function demo(
/** @type {String} */ mandatory,
/** @type {Number} */ optional1 = 0,
/** @type {Number} optional2 = undefined,
)
If you hover over demo in your IDE you should see both ...
Download a single folder or directory from a GitHub repo
...
Update Sep. 2016: there are a few tools created by the community that can do this for you:
GitZip (Credits to Kino - upvote his answer right here!)
DownGit (Credits to Minhas Kamal - upvote his answer right here!)
Git doesn't support this, but Github does via SVN. If...
How to create a hash or dictionary object in JavaScript [duplicate]
...JavaScript. It can be used instead of simply using Object. It is supported by current versions of all major browsers.
Maps do not support the [subscript] notation used by Objects. That syntax implicitly casts the subscript value to a primitive string or symbol. Maps support any values as keys, so y...
git diff two files on same branch, same commit
...t for that, just use diff fileA.php fileB.php (or vimdiff if you want side by side comparison)
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