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Accessing last x characters of a string in Bash
... line:
$ foo=1234567890
$ echo $foo | grep -o ...$
890
To make it optionally get the 1 to 3 last chars, in case of strings with less than 3 chars, you can use egrep with this regex:
$ echo a | egrep -o '.{1,3}$'
a
$ echo ab | egrep -o '.{1,3}$'
ab
$ echo abc | egrep -o '.{1,3}$'
abc
$ echo abcd ...
What's so bad about Template Haskell?
...on for avoiding Template Haskell is that it as a whole isn't type-safe, at all, thus going against much of "the spirit of Haskell." Here are some examples of this:
You have no control over what kind of Haskell AST a piece of TH code will generate, beyond where it will appear; you can have a value ...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...应该去考虑研究量子物理和生物化学，这样，我才能重返98年杀掉还在大学的我，然后达到21天搞定C++的目标。另外，得要特别提醒刚刚开始学习C++的朋友，第21天的时候，小心被人杀害。呵呵。
当然，上面只是一个恶搞此类图...
C++常用排序算法汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...kSort(array, i, high);
}
int main()
{
int array[] = {95, 45, 48, 98, 1, 485, 65, 478, 1, 2325};
int n = sizeof(array)/sizeof(array[0]);
std::cout << "Before Quick Sort :" << std::endl;
printArray(array, n);
quickSort(array, 0, n-1);
std::cout << "After Quick ...
When is memoization automatic in GHC Haskell?
...2' = \n -> (!!) (filter odd [1..]) n
(Note: The Haskell 98 report actually describes a left operator section like (a %) as equivalent to \b -> (%) a b, but GHC desugars it to (%) a. These are technically different because they can be distinguished by seq. I think I might have submitted a G...
CSS: bolding some text without changing its container's size
I have a horizontal navigation menu, which is basically just a <ul> with the elements set side-by-side. I do not define width, but simply use padding, because I would like the widths to be defined by the width of the menu item. I bold the currently-selected item.
...
Change the name of the :id parameter in Routing resources for Rails
...:name', :to => 'sites#show', :as => site
end
You would have to manually add all the routes that resources automatically creates for you, but it would achieve what you're looking for. You could also effectively use the :controller option with scope and additional scope blocks to take out some...
What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...
devnulldevnull
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...
accepting HTTPS connections with self-signed certificates
...d to do is to set the level of verification.
Such levels is not so much:
ALLOW_ALL_HOSTNAME_VERIFIER
BROWSER_COMPATIBLE_HOSTNAME_VERIFIER
STRICT_HOSTNAME_VERIFIER
Although the method setHostnameVerifier() is obsolete for new library apache, but for version in Android SDK is normal.
And so we tak...
Show data on mouseover of circle
...u don't need the mousehandler. The code would be something like
vis.selectAll("circle")
.data(datafiltered).enter().append("svg:circle")
...
.append("svg:title")
.text(function(d) { return d.x; });
If you want fancier tooltips, you could use tipsy for example. See here for an example....