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What's the point of having pointers in Go?
...
I really like example taken from http://www.golang-book.com/8
func zero(x int) {
x = 0
}
func main() {
x := 5
zero(x)
fmt.Println(x) // x is still 5
}
as contrasted with
func zero(xPtr *int) {
*xPtr = 0
}
func main() {
x := 5
...
Commands executed from vim are not recognizing bash command aliases
...:
My solution to this was as simply as copying .zshrc to .zshenv - as per http://zsh.sourceforge.net/Intro/intro_3.html:
`.zshenv' is sourced on all invocations of the shell, unless the -f option is set. It should contain commands to set the command search path, plus other important environment...
What are the lesser known but useful data structures?
...e a few:
Suffix tries. Useful for almost all kinds of string searching (http://en.wikipedia.org/wiki/Suffix_trie#Functionality). See also suffix arrays; they're not quite as fast as suffix trees, but a whole lot smaller.
Splay trees (as mentioned above). The reason they are cool is threefold:
...
What is a Manifest in Scala and when do you need it?
...using type-classes in scala, and is well explained here by Debasish Ghosh:
http://debasishg.blogspot.com/2010/06/scala-implicits-type-classes-here-i.html
Context bounds can also just make the method signatures more readable. For example, the above function could be re-written using context bounds ...
Trigger 404 in Spring-MVC controller?
...ception declared with @ResponseStatus annotation:
@ResponseStatus(value = HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException {
...
}
@Controller
public class SomeController {
@RequestMapping.....
public void handleCall() {
if (isFound()) {
...
Enabling error display in PHP via htaccess only
...onfiguration settings using directives in Apache configuration files (e.g. httpd.conf) and .htaccess files. You will need "AllowOverride Options" or "AllowOverride All" privileges to do so. php.net/manual/en/configuration.changes.php
– silex
May 25 '11 at 17:01...
Replace one character with another in Bash
...irst blank only
bar=${foo/ /.}
# replace all blanks
bar=${foo// /.}
See http://tldp.org/LDP/abs/html/string-manipulation.html for more details.
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...
Javascript Equivalent to C# LINQ Select
...this.fruits, function (v){
return v.Id;
});
console.log(ids, ids2);
http://jsfiddle.net/NsCXJ/1/
Since array.map isn't supported in older browsers, I suggest that you stick with the jQuery method.
If you prefer the other one for some reason you could always add a polyfill for old browser su...
How to insert values into C# Dictionary on instantiation?
...
There's whole page about how to do that here:
http://msdn.microsoft.com/en-us/library/bb531208.aspx
Example:
In the following code example, a Dictionary<TKey, TValue> is
initialized with instances of type StudentName:
var students = new Dictionary<int, ...
Maven in Eclipse: step by step installation [closed]
...
(Edit 2016-10-12: Many Eclipse downloads from https://eclipse.org/downloads/eclipse-packages/ have M2Eclipse included already. As of Neon both the Java and the Java EE packages do - look for "Maven support")
Way 1: Maven Eclipse plugin installation step by step:
Open ...