I am confused about the difference between function calls via . and via : > x = {foo = function(a,b) return a end, bar = function(a,b) return b end, } > return x.foo(3,4) 3 > return x.bar(3,4) 4 > return x:foo(3,4) table: 0x10a120 > return x:bar(3,4) 3 What is the : doing ? 3 Answers … Read more
In Java I can do something like derp(new Runnable { public void run () { /* run this sometime later */ } }) and “run” the code in the method later. It’s a pain to handle (anonymous inner class), but it can be done. Does Go have something that can facilitate a function/callback being passed … Read more
Generally speaking, we all hear about the functions or procedures in programming languages. However, I just found out that I use these terms almost interchangeably (which is probably very wrong). So, my question is: What is the difference in terms of their functionality, their purpose and use? An example would be appreciated. 18 Answers 18
I read Scala Functions (part of Another tour of Scala). In that post he stated: Methods and functions are not the same thing But he didn’t explain anything about it. What was he trying to say? 10 Answers 10
Sometimes when I read articles in the Scala ecosystem I read the term “lifting”https://stackoverflow.com/”lifted”. Unfortunately, it is not explained what that exactly means. I did some research, and it seems that lifting has something to do with functional values or something like that, but I was not able to find a text that explains what … Read more
How can I jump to a function definition using Vim? For example with Visual Assist, I can type Alt+g under a function and it opens a context menu listing the files with definitions. How can I do something like this in vim? 11 Answers 11
How to explain callbacks in plain English? How are they different from calling one function from another function taking some context from the calling function? How can their power be explained to a novice programmer? 33 Answers 33 I am going to try to keep this dead simple. A “callback” is any function that is … Read more
The following code compiles in Swift 1.2: class myClass { static func myMethod1() { } class func myMethod2() { } static var myVar1 = “” } func doSomething() { myClass.myMethod1() myClass.myMethod2() myClass.myVar1 = “abc” } What is the difference between a static function and a class function? Which one should I use, and when? If … Read more
This question already has answers here: What’s the difference between an argument and a parameter? (36 answers) Arguments or parameters? [duplicate] (12 answers) Closed 2 years ago. I got parameter and argument kind of mixed up and did not really pay attention to when to use one and when to use the other. Can you … Read more
Could someone explain? I understand the basic concepts behind them but I often see them used interchangeably and I get confused. And now that we’re here, how do they differ from a regular function? 15 s 15 There is a lot of confusion around lambdas and closures, even in the answers to this StackOverflow question … Read more
