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Unpacking, extended unpacking and nested extended unpacking
...et's see how it works for a slightly more complex example:
(a,b), c, = [1,2],'this' # a = '1', b = '2', c = 'this'
Applying the above rules, we get
((a, b), c) = ((1, 2), ('t', 'h', 'i', 's'))
But now it's clear from the structure that 'this' won't be unpacked, but assigned directl...
Haskell: Where vs. Let
...parameters of the function f (there are none) and things in outer scopes.
2: To use a where in the first example, you can introduce a second named function
that takes the x as a parameter, like this:
f = State f'
f' x = y
where y = ... x ...
or like this:
f = State f'
where
f' x = y...
Get loop count inside a Python FOR loop
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edited Jun 21 '18 at 5:09
answered Jul 1 '10 at 23:02
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Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...当你把他的源码下下来编译后，你会发现解释器居然不到200k，这是多么地变态啊（/bin/sh都要1M，MacOS平台），而且能和C语言非常好的互动。我很好奇得浏览了一下Lua解释器的源码，这可能是我看过最干净的C的源码了。
我不想...
NuGet Package Manager errors when trying to update
Opening VS2010 today, the extension manager notified me of an update for NuGet Package Manager.
4 Answers
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Is there any way to use a numeric type as an object key?
... a string via the toString method.
> var foo = {}
undefined
> foo[23213] = 'swag'
'swag'
> foo
{ '23213': 'swag' }
> typeof(Object.keys(foo)[0])
'string'
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Updating MySQL primary key
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235
Next time, use a single "alter table" statement to update the primary key.
alter table xx dro...
Android:What is difference between setFlags and addFlags for intent
... flags look like this: 1, 10, 100, 1000, etc... (which in this case are 1, 2, 4, 8). So, what addFlags does is appending the integer you pass using the | operator.
// example...
// value of flags: 1
intent.setFlags(2|4);
// now flags have this value: 110
intent.addFlags(8);
// now flags have thi...
How to find difference between two Joda-Time DateTimes in minutes
...DateTime objects in milliseconds:
DateTime d1 = new DateTime();
DateTime d2 = new DateTime();
long diffInMillis = d2.getMillis() - d1.getMillis();
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