Avoid IF statement after condition has been met

Posted by greye on Stack Overflow See other posts from Stack Overflow or by greye
Published on 2010-03-26T06:54:05Z Indexed on 2010/03/26 7:03 UTC
Read the original article Hit count: 277

Filed under:

if-condition

|

python

|

Performance

I have a division operation inside a cycle that repeats many times. It so happens that in the first few passes through the loop (more or less first 10 loops) the divisor is zero. Once it gains value, a div by zero error is not longer possible.

I have an if condition to test the divisor value in order to avoid the div by zero, but I am wondering that there is a performance impact that evaluating this if will have for each run in subsequent loops, especially since I know it's of no use anymore.

How should this be coded? in Python?

© Stack Overflow or respective owner

Related posts about if-condition

Rails - How do I write this string condition as an array condition

as seen on Stack Overflow - Search for 'Stack Overflow'
named_scope :correct, :include => :correction, :conditions => "checked_at IS NOT NULL AND corrections.id IS NULL" On a side note I have googled loads and looked through books but i cant seem to find a list of all the various types of conditions you can use and how they differ when implenting… >>> More
How to linebreak long string constructs ?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am editing SQLite SQL statements of substantial length. How can I break these into several lines to allow comfortablt editing? const char *sql = "SELECT arguments arguments arguments arguments arguments arguments arguments arguments arguments arguments FROM a, b, WHERE condition condition condition… >>> More
Quick question - how to comment if-else structure?

as seen on Stack Overflow - Search for 'Stack Overflow'
Lets say you have: if(condition) { i = 1; } else { i = 2; } and you need to put comments explaining if and else blocks. What's the most readable way of doing it so someone can easily pick them up at first glance? I usually do it like this: //check for condition if(condition) { i =… >>> More
Building an *efficient* if/then interface for non-technical users to build flow-control in PHP

as seen on Stack Overflow - Search for 'Stack Overflow'
I am currently building an internal tool to be used by our management to control the flow of traffic. I have built an if/then interface allowing the user to set conditions for certain outcomes, however it is inefficient to use the switch statement to control the flow. How can I improve the efficiency… >>> More
Run VBA macro when condition is met

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello all, I'm creating a spreadsheet to train my numerical skills. Now, I use VBA macros to generate a new problem once the current one has been correctly solved. To do so, I still have to press a button in the worksheet, which costs time and is annoying. Is there a way that I can execute a… >>> More

Related posts about python

unmet dependencies in Ubuntu 12.04

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I tried today to install a dvb-card on my Ubuntu 12.04 (Linux blauhai-linux 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ). The installation failed with an error. After that, i tried to install python (it was already installed but i got this error): linux:~$… >>> More
How can I get sikuli-ide to work?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I installed sikuli-ide with sudo apt-get install sikuli-ide Everything was fine until I tried to start it from the terminal. I typed sikuli-ide But the only response I got was [info] locale: en_US The application was not started, furthermore there is no desktop file and sikuli-ide does not… >>> More
Getting PATH right for python after MacPorts install

as seen on Super User - Search for 'Super User'
I can't import some python libraries (PIL, psycopg2) that I just installed with MacPorts. I looked through these forums, and tried to adjust my PATH variable in $HOME/.bash_profile in order to fix this but it did not work. I added the location of PIL and psycopg2 to PATH. I know that Terminal is… >>> More
call python with system() in R to run a python script emulating the python console

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to pass a chunk of Python code to Python in R with something like system('python ...'), and I'm wondering if there is an easy way to emulate the python console in this case. For example, suppose the code is "print 'hello world'", how can I get the output like this in R? >>> print… >>> More
Python - Calling a non python program from python?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am currently struggling to call a non python program from a python script. I have a ~1000 files that when passed through this C++ program will generate ~1000 outputs. Each output file must have a distinct name. The command I wish to run is of the form: program_name -input -output -o1 -o2… >>> More