increment

I read from the official tutorial of Java that prefix and postfix ++ -- have different precedences: postfix: expr++ expr-- unary: ++expr --expr +expr -expr ~ ! Operators According to the tutorial, shouldn't this d = 1; System.out.println(d++ + ++d); print out 6 ( d++ makes d 2, ++d makes it 3) instead of 4? I know the explanation of ++d being evaluated beforehand, but if d++ has higher precedence then ++d , why isn't d++ being first evaluated? And what is more, in what case should d++ shows that it has higher precedence? EDIT: I tried the following: d = 1; System.out.println(++d * d++); It

I have a single table containing many users. In that table I have column called user_id (INT), which I want increment separately for each person. user_id MUST start at 1 I've prepared a simple example: Showing all names +--------------+-----------------------+ | user_id | name | +--------------+-----------------------+ | 1 | Bob | | 1 | Marry | | 2 | Bob | | 1 | John | | 3 | Bob | | 2 | Marry | +--------------+-----------------------+ Showing only where name = Bob +--------------+-----------------------+ | user_id | name | +--------------+-----------------------+ | 1 | Bob | | 2 | Bob | | 3 |

I'm trying to increment a number inside an element on page. But I need the number to include a comma for the thousandth place value. (e.g. 45,000 not 45000) <script> // Animate the element's value from x to y: $({someValue: 40000}).animate({someValue: 45000}, { duration: 3000, easing:'swing', // can be anything step: function() { // called on every step // Update the element's text with rounded-up value: $('#el').text(Math.round(this.someValue)); } }); </script> <div id="el"></div> How can I increment a number using animate with comma? Tats_innit Working Demo http://jsfiddle.net/4v2wK/ Feel

I have a very large table with two INT columns that are null on Default. This is a problem because since they are INT fields, it would help in many cases if they were originally set to 0. So my questions are, is there a way I can UPDATE and INCREMENT(+1) these fields while they are like this (null on Default)? BTW.. I didn't have luck so far, it seems increment only works when the default=0 ..or is my only option to Change the Default to none from null UPDATE TableName SET column = IFNULL(column, 0) + 1 WHERE ... More info on IFNULL . It returns the first argument if it is not NULL , the

Is there any reason for Scala not support the ++ operator to increment primitive types by default? For example, you can not write: var i=0 i++ Thanks pkaeding My guess is this was omitted because it would only work for mutable variables, and it would not make sense for immutable values. Perhaps it was decided that the ++ operator doesn't scream assignment, so including it may lead to mistakes with regard to whether or not you are mutating the variable. I feel that something like this is safe to do (on one line): i++ but this would be a bad practice (in any language): var x = i++ You don't want

Why do the x86 instruction INC (increment) and DEC (decrement) not affect the CF (carry flag) in FLAGSREGISTER? Ira Baxter To understand why you probably need to remember the current "x86" CPUs with 32 and 64 bit values started life as much more limited 8-bit machines, going back to the Intel 8008. (I coded in this world back in 1973, I still remember (ugh) it!). In that world, registers were precious and small. You need INC / DEC for various purposes, the most common being loop control. Many loops involved doing "multi-precision arithmetic" (e.g, 16 bits or more!) By having INC / DEC set the

I have an int pointer (i.e., int *count ) that I want to increment the integer being pointed at by using the ++ operator. I thought I would call: *count++; However, I am getting a build warning "expression result unused" . I can: call *count += 1; But, I would like to know how to use the ++ operator as well. Any ideas? Doug T. The ++ has equal precedence with the * and the associativity is right-to-left . See here. It's made even more complex because even though the ++ will be associated with the pointer the increment is applied after the statement's evaluation. The order things happen is:

I want to create an incrementing second timer like a stopwatch. So I want to be able to display the seconds and minutes incrementing in the format 00:01... Google only brings up 24 hour clock examples, I was wondering could anyone get me started with an example or tutorial of what I want to do? Edit: Here is what I have using the Chronometer in Android so far In onCreate() secondsT = 0; elapsedTimeBeforePause = 0; stopWatch.start(); startTime = SystemClock.elapsedRealtime(); stopWatch.setBase(elapsedTimeBeforePause); stopWatch.setOnChronometerTickListener(new OnChronometerTickListener(){

I have a question about SQL and locking strategies. As an example, suppose I have a view counter for the images on my website. If I have a sproc or similar to perform the following statements: START TRANSACTION; UPDATE images SET counter=counter+1 WHERE image_id=some_parameter; COMMIT; Assume that the counter for a specific image_id has value '0' at time t0. If two sessions updating the same image counter, s1 and s2, start concurrently at t0, is there any chance that these two sessions both read the value '0', increase it to '1' and both try to update the counter to '1', so the counter will

Are there other ways to increment a for loop in Javascript besides i++ and ++i ? For example, I want to increment by 3 instead of one. for (var i = 0; i < myVar.length; i+3) { //every three } Use the += assignment operator : for (var i = 0; i < myVar.length; i += 3) { Technically, you can place any expression you'd like in the final expression of the for loop, but it is typically used to update the counter variable. For more information about each step of the for loop, check out the MDN article . ninjagecko A for loop: for(INIT; TEST; ADVANCE) { BODY } Means the following: INIT; while (true) {