Assume i have the following code, there are three for loop to do something. Would it run fast if i change the most outer for loop to while loop? thanks~~ int length = 200; int test = 0; int[] input = new int[10]; for(int i = 1; i <= length; i++) { for (int j = 0; j <=length - i; j++) { for (int k = 0; k < length - 1...
Hello good people, I was using a foreach loop to go through a list of data to process (removing said data once processed--this was inside a lock). This method caused an ArgumentException now and then. Catching it would have been expensive so I tried tracking down the issue but I couldn't figure it out. I have since switched to a for l...
Suppose I want perform a simulation using the following function: fn1 <- function(N) { res <- c() for (i in 1:N) { x <- rnorm(2) res <- c(res,x[2]-x[1]) } res } For very large N, computation appears to hang. Are there better ways of doing this? (Inspired by: https://stat.ethz.ch/pipermail/r-help/2008-February/155591....
Here is my code: $today = date('Y-m-d'); for ($i = 1; $i <= 10; $i ++){ $var_b[$i] = date('Y-m-d', strtotime('-' . $i .' day', strtotime($today))); $var2_b[$i]_name = date('d', strtotime($var_b[$i])); Error message: Parse error: syntax error, unexpected T_STRING in XXX\index.php on line XX EDIT: I put the curly brackets, the erro...
Hi, is it possible to do this? (here is my code) for ($i = 0 ; $i <= 10 ; $i++){ for ($j = 10 ; $j >= 0 ; $j--){ echo "Var " . $i . " is " . $k . "<br>"; } } I want something like this: var 0 is 10 var 1 is 9 var 2 is 8 ... But my code is wrong, it gives a huge list. Php guru, help me !! ...
I have two arrays: $Forms and $formsShared. <?php foreach ($Forms as $r): ?> $("#shareform<?=$r['Form']['id'];?>").hide(); $(".Share<?=$r['Form']['id'];?>").click(function () { $("#shareform<?=$r['Form']['id'];?>").toggle("show"); }); <?php endforeach; ?> Currently, I have this hide and toggle function for each For...
Below is my code I am trying to get to work but I really have very little knowledge of array and foreach. So it doesn;t work correctly I need to show a dropdown select form to the browser with the contents of the array I also need to have the item selected if it is == to $mycountry Lastly I would like to show the USA and UK at the top ...
Hello, I have a for loop as below which populates this data into an array. I would like this to essentially populate 15 different array's, I have written some Pseudo code below. Is this achievable? for (int y = 1; y < 16; y++) { NSArray *array + y = item } ...
Hi, I am trying to find way to break / exit from FOR loop, if there are any error occured. Below is content of batch file. @echo on set myfile=D:\sample.txt FOR /F "tokens=1,2 delims=," %%i in (%myfile%) do call :process "%%i" :process set recfile=%1% echo %recfile% echo "Step in Test1" echo %errorlevel% pause; exit /B 0 If %errorl...
In my example code below, is the counter = 0 really required, or is there a better, more Python, way to get access to a loop counter? I saw a few PEPs related to loop counters, but they were either deferred or rejected (PEP 212 and PEP 281). This is a simplified example of my problem. In my real application this is done with graphics an...
Hi All, I'm trying to write a small batch script that will delete files old files from a directory. The first parameter is the directory for the script to look into, and the second is the number of files to preserve. rem @ECHO OFF rem %1 is the path in which to look for the files rem %2 is the number of recent files to preserve if [%...
This is a school problem I am working on for an intro Java class. The assignment is to write a program that generates an 8 x 8 matrix of randomly generated binary numbers and have the program check which, if any, columns are all 0's and if the major and minor diagonals are also comprised of zeroes. A major diagonal is the diagonal formed...
Here's what I got- $awards_sql_1 = mysql_query('SELECT * FROM categories WHERE section_id = 1') or die(mysql_error()); $awards_rows_1 = mysql_num_rows($awards_sql_1); $awards_sql_2 = mysql_query('SELECT * FROM categories WHERE section_id = 2') or die(mysql_error()); $awards_sql_3 = mysql_query('SELECT * FROM categories WHERE section...
There has to be a faster way of doing this. There is a lot going on here, but it's fairly straightforward to unpack. Here is the relevant python code (from scipy import *) for i in arange(len(wav)): result[i] = sum(laser_flux * exp(-(wav[i] - laser_wav)**2) ) There are a bunch of arrays. result -- array of length (wav) laser_f...
Ok. so I'm working on an app that retrieves items from a db and builds a gallery. I've done this a ton of times, and it should be simple. I'm running into problems, because in this gallery, I get results from a db that includes both image files, and other files. Let's just say I can't change anything but the flash, so I need to detect i...
Hi All, This is my config.ini file options affecting ndbd processes on all data nodes: [ndbd default] NoOfReplicas=1 # Number of replicas DataMemory=80M # How much memory to allocate for data storage IndexMemory=18M # How much memory to allocate for index storage # For DataMemory and IndexMemory, we have use...
I would like to increment 2 variables in a for-loop condition instead of one. So something like: for(int i = 0, i != 5; ++i and ++j) do_something(i,j); What is the syntax for this? ...
Realizing that loops are usually not ideal in R, sometimes they are necessary. When writing large loops, doesn't for (i in 1:large_number) waste memory, since a vector of size large_number must be created? Would this make while loops the best choice for large, necessary loops? ...
Is it different than C or C#? ...
Hello everyone, Just a quick question. I have a loop that looks like this: for (int i = 0; i < dim * dim; i++) Is the condition in a for loop re-evaluated on every loop? If so, would it be more efficient to do something like this?: int dimSquare = dim * dim; for (int i = 0; i < dimSquare; i++) Thanks -Faken ...