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ActiveRecord: size vs count
...l valid.
You'll adapt the function you use depending on your needs.
Basically:
if you already load all entries, say User.all, then you should use length to avoid another db query
if you haven't anything loaded, use count to make a count query on your db
if you don't want to bother with these con...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast简单总结：1)const_cast：移除const属性。2)static_cast：强转，与C类型转换类似，不检查类型来保证转换安全。也可用于指针的父类到子类的...简单总结：
1) const_cast：移除const属性。
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Can table columns with a Foreign Key be NULL?
...d Mar 2 '10 at 21:37
Daniel VassalloDaniel Vassallo
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SQL Switch/Case in 'where' clause
...statement exits after a condition is met - but the OR syntax will evaluate all the possibilities
– tember
May 12 '15 at 18:27
1
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How to specify an area name in an action link?
... This is a very good tip! But it gives not expected results with MVC 2.. Small correction - Html.ActionLink("home", "Index", new { area = "", controller = "Home" })
– Alexander Beletsky
Nov 20 '10 at 10:36
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Does Java read integers in little endian or big endian?
...you are unlikely to have ever encountered it as Intel, Motorola, and Zilog all agreed on the shift direction of their UART chips and that MSB of a byte would be 2**7 and LSB would be 2**0 in their CPUs (I used the FORTRAN power notation to emphasize how old this stuff is :) ).
I ran into this issue ...
Should I write script in the body or the head of the html? [duplicate]
...
I would answer this with multiple options actually, the some of which actually render in the body.
Place library script such as the jQuery library in the head section.
Place normal script in the head unless it becomes a performance/page load issue.
Place script associa...
Interface/enum listing standard mime-type constants
...mons, jax, jboss, javax) for an interface or enum that lists the values of all the standard mime-type (aka content-type).
1...
Where am I wrong about my project and these Javascript Frameworks?
... Which of the frameworks you've tried have you taken for a spin?
Personally, I got into ExtJS development because the projects I work on require a lot of customization of controls/widgets. ExtJS has a ton of them right out of the box and can always be extended, combined, or munged into whatever...
Search code inside a Github project
...e when using the default search selector "Everything":)
(I suppose we can all than Tim Pease, which had in one of his objectives "hacking on improved search experiences for all GitHub properties", and I did mention this Stack Overflow question at the time ;) )
Here is an illustration of a grep wit...