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What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...e, and is better for modern high-performance CPUs where latency and out-of-order execution matter. (The i386 ABI is very old).
In this new mechanism: First the parameters are divided into classes. The class of each parameter determines the manner in which it is passed to the called function.
For ...
Why is Go so slow (compared to Java)?
...n spends runtime supporting language features that the benchmark doesn't really need. In most compiled languages a sufficiently clever compiler could in theory strip out what isn't needed, but there comes a point where you're rigging the demo, since very few real users of the language would write pr...
Mismatched anonymous define() module
...s with anonymous modules is to overwrite the requirejs.onError function in order to prevent the default error exception thrown by requirejs which stops succesive modules or code to be executed.
– xtrm
May 22 '17 at 16:42
...
Export specific rows from a PostgreSQL table as INSERT SQL script
...
Take care that the order of the columns you SELECT matches the order of the columns in the destination database. If it doesn't, this could fail, or worse, succeed but insert bad data.
– Nathan Wallace
Jul ...
How to rollback a specific migration?
...e error in the original post)
rake db:migrate VERSION=20100905201547
In order to rollback ONLY ONE specific migration (OUT OF ORDER) use:
rake db:migrate:down VERSION=20100905201547
Note that this will NOT rollback any interceding migrations -- only the one listed. If that is not what you inte...
Removing duplicate objects with Underscore for Javascript
... array of strings. Also, if you add b values to the uniques and invert the order of a/b they are no longer considered unique by your function. (e.g. `"{\"a\":\"1\",\"b\":2}" != "{\"b\":2,\"a\":\"1\"}") Maybe im missing something, but shouldn't the result at least be useful? Here is a jsbin to illust...
namedtuple and default values for optional keyword arguments
...(Node._fields)
>>> Node()
Node(val=None, left=None, right=None)
Order
In all versions of Python, if you set fewer default values than exist in the namedtuple, the defaults are applied to the rightmost parameters. This allows you to keep some arguments as required arguments.
>>>...
Where and how is the _ViewStart.cshtml layout file linked?
...ws" folder that you might need it. If you add a custom RazorViewEngine in order to organize views into other folders, you have to include the file in the root of those alternate view folders as well. For example, I moved all the Inspinia template views into a folder and ran this in the view engine...
Disable output buffering
...
A straight-forward way of using the flush keyword argument of Python 3 in order to always have unbuffered output is:
import functools
print = functools.partial(print, flush=True)
afterwards, print will always flush the output directly (except flush=False is given).
Note, (a) that this answers t...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...一个Key Value的数据结构，它很像Javascript中的Object，或是PHP中的数组，在别的语言里叫Dict或Map，Table长成这个样子：haoel = {name="ChenHao", age=37, handsome=True}复制代码
下面是table的CRUD操作：haoel.website="http://coolshell.cn/"
lo...