Make life so pleasant.

I wish I'd been aware of this programming concept as a kid.

Could you throw more light

Sure.

I want to call some function f(n,k).

I want to examine it under two regimes:

1. k fixed at 1, and n varying over 100, 1000, 10000
2. k=sqrt(n), n varying over 100, 1000, 10000
3. k=0.5*n, n varying over 100, 1000, 10000

One very simple way for me to do this is to wrap f with a new function g that takes n as a parameter, as well as a function h_1, h_2, or h_3.

This allows me to avoid modifying the internals of the function f, or have some sort of awkward implementation of f which takes say a code corresponding to which function I want it to select.

So g looks like the following:

Thanks, but can i see a java version of the g function?

It looks like you guys don't have lambdas in java...but they are available in Java 8?

You have to do something a bit kludgy to get the same behavior:
http://stackoverflow.com/questions/929988/equivalent-for-pythons-lambda-functions-in-java

^ Thanks a million

np

thats one of the many reasons python developers are so passionate about it

i like the ability to pass objects around in python without python making copies
so you get to work on same object anywhere in your app.

Actionscript 3 has one feature i wish could be replicated in python, or maybe it's there but am not aware of it.
in as3, a dictionary key can be any object,
so when you modify the key anywhere else or even on the dictionary itself, it becomes updated throughout your app
regardless of if it's in use.

Lambda functions exist in C++. Its offered by boost libraries (#include <boost/lambda/lambda.hpp>.
It also exists in much recent versions of C++ (though am yet to use the native C++ version).

@webdezzi, passing objects around without making copies of them exists in C/C++. Its done by referencing them like func(&arg);

in as3, a dictionary key can be any object,
so when you modify the key anywhere else or
even on the dictionary itself, it becomes updated throughout your app
regardless of if it's in use.
are you talking about static or global instances?

also possible in javaScript

[2,4,5,6,7,8].each(function(item){
item=item*2 ;
});

var x=function(a){alert(a)} ;
x( "Okeowo" ) ;
//even allows me to do currying
var x=function(a){return function(b){console.log( a+b ) ; } }
x("Okeowo Love" ) ( "JavaScript" ) ;

That shit cray

Yeah, Javascript is actually a functional programming language.

So for a JS guy, what I said is nothing new.

^ yeah true, which is why i love it, and you know the funny thing PHP has anonymous functions but it feels weird using it, Functional languages are fun i'd like to learn python soon enough. its the space stuff and no curly braces i might ave to get used to.

lordZOUGA: Lambda functions exist in C++. Its offered by boost libraries (#include <boost/lambda/lambda.hpp>.
It also exists in much recent versions of C++ (though am yet to use the native C++ version).

@webdezzi, passing objects around without making copies of them exists in C/C++. Its done by referencing them like func(&arg);

thanks for that reminder, maybe when i start serious work with C, i'll enjoy that beauty

in as3, a dictionary key can be any object,
so when you modify the key anywhere else or
even on the dictionary itself, it becomes updated throughout your app
regardless of if it's in use.
are you talking about static or global instances?

both.

e.g.

var theObject:myClass=new myClass();  //create an object with myClass
var anotherObject:yourClass=new yourClass();

var myDict:Dictionary = new Dictionary();
myDict[theObject] = anotherObject;

lets say you are using theObject above to hold mp3 binary data
and somewhere else, where theObject is accessible, you decide to chop of part of the mp3 data and append another song data to it
you will assume anotherObject will be lost simply because the key to access it has changed, right?
nope!
you can still use theObject as a key to anotherObject.
this can very useful instead of passing objects around as function parameters.
if your dictionary is public, you can simply borrow it's key.

for some reason i never liked ActionScript the syntax was weird,

^thanks a lot omo_dun but mehn NodeJS is the main shit peeps should be trying now, so many crafty ideas you can come up with,