大约有 32,000 项符合查询结果（耗时：0.0453秒） [XML]
When should one use a spinlock instead of mutex?
...-spin-locks-good-choices-in-linux-kernel-design-instead-of-something-more
Info on dispatching on windows systems:
http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281-92cdfeae4b45/IRQL_thread.doc
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How to 'insert if not exists' in MySQL?
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Just to inform everyone. Using INSERT … ON DUPLICATE KEY UPDATE method does increment any AUTO_INCREMENT column with failed insert. Probably because it's not really failed, but UPDATE'd.
– not2qubit
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Understanding the Gemfile.lock file
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However, since Gemfile.lock is a snapshot of Gemfile, which means all its information should come from Gemfile (or from default value if not specified in Gemfile).
For GEM, it lists all the dependencies you introduce directly or indirectly in the Gemfile. remote under GEM tells where to get the ge...
How can I get the full object in Node.js's console.log(), rather than '[Object]'?
...pect() directly.
Details below.
console.log() (and its alias, console.info()):
If the 1st argument is NOT a format string: util.inspect() is automatically applied to every argument:
o = { one: 1, two: 'deux', foo: function(){} }; console.log(o, [1,2,3]) // -> '{ one: 1, two: 'deux', foo...
Relation between CommonJS, AMD and RequireJS?
...turn the module immediately. This does not work well in the browser". More info here.
– msenni
Jan 6 '15 at 11:50
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...e passed a Hex or RGB color and it returns an object containing this color information. Its in the form: {r: XXX, g: XXX, b: XXX, a: X.XXX}. Where .r, .g, and .b have range 0 to 255. And when there is no alpha: .a is -1. Otherwise: .a has range 0.000 to 1.000.
For RGB output, it outputs rgba() over ...
CSS selector for first element with class
...ass="red">fourth</p>
</div>
Credits to Martyn. More infos for example here. Be aware that this is a CSS 3 selector, therefore not all browsers will recognize it (e.g. IE8 or older).
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Facebook Post Link Image
...rm application ID. At a minimum, include only your own Facebook ID.
More information on Open Graph tags and details on Administering your page can be found on the Open Graph protocol documentation.
http://developers.facebook.com/docs/reference/plugins/like
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Remove sensitive files and their commits from Git history
...e
In the future, if you accidentally commit some changes with sensitive information but you notice before pushing to a remote repository, there are some easier fixes. If you last commit is the one to add the sensitive information, you can simply remove the sensitive information, then run:
git co...
What is the most efficient/elegant way to parse a flat table into a tree?
...ad "Trees and Hierarchies in SQL for Smarties" by Joe Celko for a lot more information on these designs.
I usually prefer a design called Closure Table (aka "Adjacency Relation") for storing tree-structured data. It requires another table, but then querying trees is pretty easy.
I cover Closure T...