Does F# have equivalent syntax to C#'s "unsafe" block
A lot of array boundary checking slows down the speed, this is especially true to 2D arrays. Is there a way to write unsafe code blocks in F#? ...
arrays
how to multiply integers to values in an array?
Actually I wanted to get absolute values out of an array and the only way i can think of multiplying the values in the array with (-1) using 'if' loop. But does it work like that? as in: for (i = 1 ; i <= 10 ; i++) { if(x[i]<1) { x[i] = (-1) * x[i]; } else{} ratio[i] = (x[i]/fx[i]) * 0.5; } I am not sure if u can...
Array shifting to the next element
How can I move elements in an array to the next element eg: x[5] = { 5, 4, 3, 2, 1 }; // initial values x[0] = 6; // new values to be shifted x[5] = { 6, 5, 4, 3, 2 }; // shifted array, it need to be shifted, // not just increment the values. This what I've done so far. It's wrong, that's why I n...
iOS - Initialising an Array from a file
Hi, I am trying to initialise an array from a file This is the file containing an array of strings .. this is the xml file <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <array> <string>ccccc</string> <string>ddddddd<...
How to convert objective C array to a C array?
I have NSArray in Objective C, which store int only. How can I convert it to C array? Thanks. My Objective C array: NSArray *myArray = [[NSArray alloc] initWithObject:@"1", @"4", @"8", nil]; ...
Numpy broadcast array
Hi, I have the following array in NumPy: A = array([1, 2, 3]) How can I obtain the following matrices (without an explicit loop)? B = [ 1 1 1 2 2 2 3 3 3 ] C = [ 1 2 3 1 2 3 1 2 3 ] Thanks! ...
Appending/creating/removing items from a javascript array, ideas??
Hi, I have a requirement whereby I have two panes on a page, the pane on the left holds a series of records specific to a option selected from a drop down. Each record has a plus sign next to it, if this is pressed it will be 'moved' to the right hand pane and displayed under the option the user selected. Multiple records can be put i...
how to go trough javasciprt array
I have this output from ajax call: {"total":"3","data":[{"id":"4242","title":"Yeah Lets Go!","created":"1274700584","created_formated":"2010-07-24 13:19:24","path":"http:\/\/domain.com\/yeah"}]} So there is three that kind of items in that array and I would need to go that through and print actual html out if. So on page it would: Ye...
Adding items to a javascript array
Hi, I'm attempting to assign items to an array on a users action, so for example, user clicks "Add", this will add the selected id into the relevant section of the array. The array won't be created at first so I set up an empty array: var Options={}; On the users click, I then want to assign a key to match the option selected from a...
Javascript for...in statement gives error when looping through array
I just tried the for...in statement in Javascript. This gives no error: var images = document.getElementsByTagName('img'); for(x in images){ document.write(images[x]) + " "); } However, this does what it should but gives an error in the FF error console. for(x in images){ images[x].style.visibility="visible"; } This made ...
Interview Question, What do they want to accomplish?
I was on a technical job interview today, and it was time to give me some programming exercises. I finally came to the last question: Given the numbers: 116 104 105 115 32 105 115 32 99 111 114 114 101 99 ? What is the next number? To really understand my mindset, I encourage you to stop reading, and really try to figure out what th...
String arrays in c
I wrote a code to read files What is wrong in the following code I am always getting last filename if I print any arrayItem #include <stdio.h> #include <string.h> char **get_files() { FILE *fp; int status; char file[1000]; char **files = NULL; int i = 0; /* Open the command for reading. */ fp = popen("ls"...
How to generate random events in android?
I have a an array of objects and would like to be able to randomly choose one from the list when a button is pressed. How would you do that in Android? ...
Remove empty array elements
Some elements in my array are empty based on what the user has entered. I need to remove these elements. This is my code to do so: // Remove empty elements foreach($linksArray as $link) { if($links == '') { unset($link); } } print_r($linksArray); But it doesn't work, $linksArray still has empty elements. I have als...
Looping through a multidimensional array in php
i have this multidimensional array in php and I need be able to access all the elements including the first element "Computers". I need to turn this array into two arrays and i used this loop $i = 0; $left = array(); $right = array(); foreach ($all_products as $product) { if ($i++ % 2 == 0) { $left[] = $product; ...
Get 0 to 9999 in PHP using FOR EACH and Array?
How would I print all values 0...9999 using an array of $array = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9); ? No clue, please help. ...
C/C++ Array initializer problem...
Can someone explain why I can do: int x[4] = { 0, 1, 2, 3 }; int *p = x; But cannot do: int x[2][2] = { 0, 1, 2, 3 }; int **p = x; Is there a way to be able to assign to **p the x[][]? TIA ...
Having trouble storing array values in mysql using php
I'm trying to explode a string into an array. A fullname to be exploded in firstname, middlename, and lastname. <?php include('conn.php'); $un=$_POST['uname']; $pw=$_POST['pw']; $fulnem=$_POST['fullnem']; $temp=explode('/',$fulnem); $email=$_POST['email']; $method="creates"; $sql="call compac...
Array and Rvalue
$4.2/1 - "An lvalue or rvalue of type “array ofN T” or “array of unknown bound of T” can be converted to an rvalue of type “pointer to T.” The result is a pointer to the first element of the array." I am not sure how do we get an rvalue of an array type other than during initialization/declaration? ...
Adding an element to the beginning of an array without changing other array keys
How can I add an element to the beginning of array without changing array key values in PHP? ...