decrement

Python: Behaviour of increment and decrement operators

I am a newbie to Python. I notice that a pre-increment/decrement operator can be applied on a variable (like ++count). It compiles, but it does not actually change the value of the variable! What is the behavior of the pre-increment/decrement operators (++/--) in Python? Why does Python deviate from the behavior of these operators seen ...

Which is the first address of ARM DA(Decrement After) addressing mode?

I have two questions about DA addressing mode. For example: STMDA R0!, {R1-R7} The start address will be R0 - (7 * 4) + 4, that is, R0-24, according to the ARM Architecture reference manual and end_address will be R0. So: Will the value of R1 will be stored to R0-24 or R0? If R1 is stored to R0-24, then subsequent stores will grow ...

Decrement in mysql goes past zero

I am trying to do this in mysql: UPDATE table SET value = value - 1 WHERE blah blah If value is 0 and this is run value is set to 4294967295. This is because it is an unsigned integer so it is looping round back to the maximum value. How would I go about making it stay on zero instead? Can I do this purely in the sql? ...

How can I define pre/post-increment behavior in Perl objects?

Date::Simple objects display this behavior, where $date++ returns the next day's date. Date::Simple objects are immutable. After assigning $date1 to $date2, no change to $date1 can affect $date2. This means, for example, that there is nothing like a set_year operation, and $date++ assigns a new object to $date. How can one custom-d...

Creating buttons for textbox and assigning click functions on the fly in JQuery

Hello, I have the following code to create two buttons (one on the left one on the right) for each texbox on the page. Idea is to make an increment/decrement textbox. Code works fine with one textbox but with 2 or more every button increment/decrements all textboxes. Any idea how to create buttons on the fly and attach them to a textbox...

Count zero interrupt

I have long been a fan of William Gibson, but it's clear that he doesn't have much tech savvy - no harm in that, maybe just kuddos that he learned a few buzzwords and wrote some awesome books. But, "count zero interrupt" just sticks in my craw ... "On receiving an interrupt, decrement the counter to zero." (The term "count zero inter...

Mixing post- and pre- increment/decrement operators on the same variable

Possible Duplicate: Why is ++i considered an l-value, but i++ is not? In C++ (and also in C), if I write: ++x-- ++(x--) i get the error: lvalue required as increment operand However (++x)-- compiles. I am confused. ...

iPhone: Problem with incrementing NSNumber & displaying transparent images (UIImageView)

Hi Guys! I have a problem with NSNumber: I don't understand how to increment and decrement it! I've tried int with [NSNumber intValue] and so on, but it didn't work!!!! I just want a page counter which can be converted to an NSNumber at the end. My second problem is displaying a (partially) transparent image in an UIImageView. It has e...

How do I increment (add one to) or decrement (subtract one from) a number, in Common Lisp?

It's all in the title, really. ...

Can solr be used to increment/decrement?

I am working on a project right now that has a solr index of counts and ids. I am currently researching if it is possible to increment/decrement on solr directly, instead of having to retrieve the data, increment it with PHP, and then reinsert it into solr. I have spent an hour googling variations of this to no avail. Any information wo...