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What optimizations can GHC be expected to perform reliably?
...Right x
As an extended example, take this definition of last:
last [] = error "last: empty list"
last (x:[]) = x
last (x:x2:xs) = last (x2:xs)
We first transform it to
last_nil = error "last: empty list"
last_cons x [] = x
last_cons x (x2:xs) = last (x2:xs)
{-# INLINE last #-}
last [] = last_...
How to implement a binary tree?
...ice implementation. I'm just here to point out some style stuff. python usually does node is not None instead of your (node!=None). Also, you can use the __str__ function instead of the printTree method.
– Jeff Mandell
Oct 18 '15 at 2:30
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How to find gaps in sequential numbering in mysql?
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answered May 19 '11 at 11:05
mattmatt
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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...lugged my (FTDI) serial device from the USB and afterwards it produced the error that you described.
– Warpspace
Jan 29 '19 at 8:30
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PostgreSQL error 'Could not connect to server: No such file or directory'
Like some others I am getting this error when I run rake db:migrate in my project or even try most database tasks for my Ruby on Rails 3.2 applications.
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How to check for a valid Base64 encoded string
...ase 64 encoded other than just trying to convert it and see if there is an error? I have code code like this:
19 Answers
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How to take the first N items from a generator or list in Python? [duplicate]
... note that if your generator exhausts this will not make an error, you will get a many elements as the generator had left, less than your request size.
– ThorSummoner
May 23 '17 at 17:23
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What is the difference between join and merge in Pandas?
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The error seems to be saying that it expects the multi index on right that is the same depth as the length on on. That makes sense to me sort of. I can accept that the semantics are different. But I'd like to know if I can get th...
Efficiency of Java “Double Brace Initialization”?
...also be serialized and thus must be Serializable. This can lead to obscure errors.
– Just another Java programmer
Feb 7 at 18:32
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lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...lua的运行环境，相关接口如下：
//创建lua运行上下文
lua_State* luaL_newstate(void) ;
//加载lua脚本文件
int luaL_loadfile(lua_State *L, const char *filename);
lua和c/c++的数据交互通过"栈"进行 ,操作数据时，首先将数据拷贝到"栈"上，然后获取...