increment

I've read that many developers use x += 1 instead of x++ for clarity. I understand that x++ can be ambiguous for new developers and that x += 1 is always more clear, but is there any difference in efficiency between the two? Example using for loop: for(x = 0; x < 1000; x += 1) vs for(x = 0; x < 1000; x++) I understand that it's usually not that big of a deal, but if I'm repeatedly calling a function that does this sort of loop, it could add up in the long run. Another example: while(x < 1000) { someArray[x]; x += 1; } vs while(x < 1000) { someArray[x++]; } Can x++ be replaced with x += 1

I'm wanting to make sure I understand pass-by-value vs pass-by-reference properly. In particular, I'm looking at the prefix/postfix versions of the increment ++ operator for an object. Let's suppose we have the following class X : class X{ private: int i; public: X(){i=0;} X& operator ++ (){ ++i; return *this; } //prefix increment X operator ++ (int unused){ //postfix increment X ret(*this); i++; return ret; } operator int(){ return i; } //int cast }; First of all, have I implemented the prefix/postfix increment operators properly? Second, how memory-efficient is the postfix operator, compared

This question already has an answer here: How do the post increment (i++) and pre increment (++i) operators work in Java? 14 answers In programming, particularly in Java, what is the difference between: int var = 0; var++; and int var = 0; ++var; What repercussions would this have on a for loop? e.g. for (int i = 0; i < 10; i++) {} for (int i = 0; i < 10; ++i) {} Dónal tldr; Although both var++ and ++var increment the variable they are applied to, the result returned by var++ is the value of the variable before incrementing, whereas the result returned by ++var is the value of the variable

I need to create a batch file that copies a file and increments it upon placing it at the destination. Example. copy C:\TEMP\MyDoc.txt E:\MyData\ Essentially, I need this copy command to copy every time I start it (which it does now just fine). I would like it to increment the file name instead of overwrite it though. If I ran this three times or 100 times (never a certain number) I would like to see on the "MyData" folder: MyDoc.txt MyDoc(1).txt ... Or Copy (1) I'm not really sure what the syntax is for a duplicated file nor do I necessarily care. I just want to ensure that I'm not

Does anyone know of a Javascript library (e.g. underscore, jQuery, MooTools, etc.) that offers a method of incrementing a letter? I would like to be able to do something like: "a"++; // would return "b" Simple, direct solution function nextChar(c) { return String.fromCharCode(c.charCodeAt(0) + 1); } nextChar('a'); As others have noted, the drawback is it may not handle cases like the letter 'z' as expected. But it depends on what you want out of it. The solution above will return '{' for the character after 'z', and this is the character after 'z' in ASCII, so it could be the result you're

Does R have a concept of += (plus equals) or ++ (plus plus) as c++/c#/others do? Patrick Cuff No, it doesn't, see: R Language Definition: Operators Following @GregaKešpret you can make an infix operator: `%+=%` = function(e1,e2) eval.parent(substitute(e1 <- e1 + e2)) x = 1 x %+=% 2 ; x R doesn't have a concept of increment operator (as for example ++ in C). However, it is not difficult to implement one yourself, for example: inc <- function(x) { eval.parent(substitute(x <- x + 1)) } In that case you would call x <- 10 inc(x) However, it introduces function call overhead, so it's slower than