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Repeat String - Javascript
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Note to new readers: This answer is old and and not terribly practical - it's just "clever" because it uses Array stuff to get
String things done. When I wrote "less process" I definitely meant
"less code" because, as others have noted in subsequent answers, it...
mmap() vs. reading blocks
...ontain sets of variable length records. I've got a first implementation up and running and am now looking towards improving performance, particularly at doing I/O more efficiently since the input file gets scanned many times.
...
JavaScript + Unicode regexes
...egex. See Unicode-aware regular expressions in ES6.
Until ES 6 is finished and widely adopted among browser vendors you're still on your own, though. Update: There is now a transpiler named regexpu that translates ES6 Unicode regular expressions into equivalent ES5. It can be used as part of your bu...
A monad is just a monoid in the category of endofunctors, what's the problem?
...r phrasing is by James Iry, from his highly entertaining Brief, Incomplete and Mostly Wrong History of Programming Languages, in which he fictionally attributes it to Philip Wadler.
The original quote is from Saunders Mac Lane in Categories for the Working Mathematician, one of the foundational text...
What's so bad about Template Haskell?
... Tough luck, you'll only see that when actually using your code generator, and only under the circumstances that trigger the generation of that particular code. It is very difficult to unit test, too.
TH is also outright dangerous:
Code that runs at compile-time can do arbitrary IO, including la...
Fastest way to iterate over all the chars in a String
... as byte[] by default.
SECOND UPDATE: As of 2016-10-25, on my AMDx64 8core and source 1.8, there is no difference between using 'charAt' and field access. It appears that the jvm is sufficiently optimized to inline and streamline any 'string.charAt(n)' calls.
THIRD UPDATE: As of 2020-09-07, on my Ry...
AI2 Keep Awake
...t WakeLocks if you do not really need them, use them as rarely as possible and release them as soon as possible. If actions are to be performed only occasionally, it is not necessary for the CPU to be constantly active. Instead, an alarm can be used (see UrsAI2Alarm ). Motivation For so...
Ship an application with a database
If your application requires a database and it comes with built in data, what is the best way to ship that application? Should I:
...
常用Linux命令详解（持续更新） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。范例如下:
显示当前目录的内容
[root@KEDACOM ~]# ls
NRU_CMU_DISK_SIZE_NOTIFY2008 anaconda-ks.cfg install.log install.log.syslog
显示名称以“.”开头的隐藏文件
[root@KEDACOM ~]# ls -a
.bash_histor .bash_profile .cshrc .ssh NRU_CMU_DISK_SIZE_NOTIFY2008 install...
What is your most productive shortcut with Vim?
I've heard a lot about Vim , both pros and cons.
It really seems you should be (as a developer) faster with Vim than with any other editor.
I'm using Vim to do some basic stuff and I'm at best 10 times less productive with Vim.
...