StudyWorks的专栏

download the latest vim (vim-7.1.293) source code (see http://www.vim.org/download.php), and compiled it: cd vim7 ./configure --with-features=huge make make install if "You need to ins...

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Notice that the second time I invoke the association via user, the object_id remains the same. The related object has been cached. However, passing true to the accessor reloads the relationship and I ...

:delete_all is much faster than :destroy_all, it doesn't trigger any destroy callbacks on the associated object. :destroy_all iteratively call the associated objects's destroy method

instance_exec allows you pass arguments to the block which is to be evaluated in the new self: o = Struct.new(:val).new("Hello") o.instance_exec("World!"){|arg| val + " " + arg} # => Hell...

mouseenter/mouseleave prevent the event bubbling

当visibility被设置为"hidden"的时候，元素虽然被隐藏了，但它仍然占据它原来所在的位置，而且width和height属性不为空       display设为"none"后width和height属性为空。         可以通过 设置 visibility为"hidden", 并且设置position为absolute， 让他不占据原来的位置并且...

sudo apt-get install zlib1g-dev ruby extconf.rb make && sudo make install。  public void static main(String[] args){ System.out.println("xxxxxxxx"); }