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  • Int[] Reverse - What does this actually do?

    - by Jamie Dixon
    I was just having a play around with some code in LINQPad and noticed that on an int array there is a Reverse method. Usually when I want to reverse an int array I'd do so with Array.Reverse(myIntArray); Which, given the array {1,2,3,4} would then return 4 as the value of myIntArray[0]. When I used the Reverse() method directly on my int array: myIntArray.Reverse(); I notice that myIntArray[0] still comes out as 1. What is the Reverse method actually doing here?

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  • Easier way to add lots of images to an array

    - by Sam Jarman
    Hey Guys In an effort to 'clean up' my code - I was wondering if this could be made simpler. I have 32 images and I was adding them like this [theCarPics addObject:[UIImage imageNamed:@"1.jpg"]]; [theCarPics addObject:[UIImage imageNamed:@"2.jpg"]]; //... [theCarPics addObject:[UIImage imageNamed:@"32.jpg"]]; is there a simpler way? loop perhaps? Any ideas would be appreciated guys Thanks Sam

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  • How to sum properties of the objects within an array in Ruby

    - by Ernst Fitschen
    I understand that in order to sum array elements in Ruby one can use the inject method, i.e. array = [1,2,3,4,5]; puts array.inject(0, &:+) But how do I sum the properties of objects within an object array e.g. There's an array of objects and each object has a property "cash" for example. So I want to sum their cash balances into one total. Something like... array.cash.inject(0, &:+) (but this doesn't work) I realise I could probably make a new array composed only of the property cash and sum this, but I'm looking for a cleaner method if possible!

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  • PHP Populating array with $variables

    - by Tom
    Hi, I'm trying to create a basic shopping cart, having an issue with the product page allowing users to add more items to their cart then are in stock (I have code in place to prevent this on the view cart page, just not the view product page) This is what I have so far; for ($i = 0; $i < $numItem; $i++) { extract($cartContent[$i]); $subTotal += $price * $cartQuantity; $cartLimiter[$itemNo => $cartQuantity]; Using an array so the position number becomes the item number and the cart quantity becomes the assigned value, however it doesn't seem to like it and throws out on the bottom line of code: Parse error: syntax error, unexpected T_DOUBLE_ARROW, expecting ']' Thanks

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  • How to output an array's content in columns in BASH.

    - by Arko
    I wanted to display a long list of strings from an array. Right now, my script run through a for loop echoing each value to the standard output: for value in ${values[@]} do echo $value done Yeah, that's pretty ugly! And the one column listing is pretty long too... I was wondering if i can find a command or builtin helping me to display all those values in columns, like the ls command does by default when listing a directory (ls -C). [Update] Losing my brain with column not displaying properly formatted columns, here's more info: The values: $ values=( 01----7 02----7 03-----8 04----7 05-----8 06-----8 07-----8 08-----8 09---6 10----7 11----7 12----7 13----7 14-----8 15-----8 16----7 17----7 18---6 19-----8 20-----8 21-----8) (Notice the first two digits as an index and the last one indicating the string length for readability) The command: echo " ${values[@]/%/$'\n'}" | column The result: Something is going wrong...

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  • How Do I Add Value To All Previous Values In Array

    - by James
    Lets say I have the following array: my_array = [1, 5, 8, 11, -6] I need to iterate over this array and add the values prior to the current value together. An example will probably be easier to understand. I need to return an array that should look something like this: final_array = [1, 6, 14, 25, 19] I have tried doing something like this: my_array.collect {|value| value + previous_values } But obviously that doesn't work because I can't figure out how to get the previous values in the array. I am a programming noob so this might be easier than I am making it. I am pretty sure I need to use either collect or inject, but I can't seem to figure out how to do this. Any help would be appreciated.

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  • Decode base64 data as array in Python

    - by skerit
    I'm using this handy Javascript function to decode a base64 string and get an array in return. This is the string: base64_decode_array('6gAAAOsAAADsAAAACAEAAAkBAAAKAQAAJgEAACcBAAAoAQAA') This is what's returned: 234,0,0,0,235,0,0,0,236,0,0,0,8,1,0,0,9,1,0,0,10,1,0,0,38,1,0,0,39,1,0,0,40,1,0,0 The problem is I don't really understand the javascript function: var base64chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split(""); var base64inv = {}; for (var i = 0; i < base64chars.length; i++) { base64inv[base64chars[i]] = i; } function base64_decode_array (s) { // remove/ignore any characters not in the base64 characters list // or the pad character -- particularly newlines s = s.replace(new RegExp('[^'+base64chars.join("")+'=]', 'g'), ""); // replace any incoming padding with a zero pad (the 'A' character is zero) var p = (s.charAt(s.length-1) == '=' ? (s.charAt(s.length-2) == '=' ? 'AA' : 'A') : ""); var r = []; s = s.substr(0, s.length - p.length) + p; // increment over the length of this encrypted string, four characters at a time for (var c = 0; c < s.length; c += 4) { // each of these four characters represents a 6-bit index in the base64 characters list // which, when concatenated, will give the 24-bit number for the original 3 characters var n = (base64inv[s.charAt(c)] << 18) + (base64inv[s.charAt(c+1)] << 12) + (base64inv[s.charAt(c+2)] << 6) + base64inv[s.charAt(c+3)]; // split the 24-bit number into the original three 8-bit (ASCII) characters r.push((n >>> 16) & 255); r.push((n >>> 8) & 255); r.push(n & 255); } // remove any zero pad that was added to make this a multiple of 24 bits return r; } What's the function of those "<<<" and "" characters. Or is there a function like this for Python?

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  • Passing a 2D array to a function in C

    - by Tyler Treat
    I have, essentially, a matrix of data (lets say ints) that I would like to store in a 2D array in which the dimensions are not known until runtime (say x columns and y rows). I want to populate the array in a function, so I assume I need to do something like this: int main(int argc, char **argv) { int y = atoi(argv[1]); int x = atoi(argv[2]); int **matrix = malloc(x * sizeof(int*)); populateMatrix(matrix, y, x); return 0; } void populateMatrix(**matrix, int y, int x) { int i, j; for (i = 0; i < y; i++) { for (j = 0; j < x; j++) { matrix[i][j] = i * j; // populated with trivial data to keep it simple } } } Obviously this doesn't work, but I'm not sure how to do what I'm describing exactly.

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  • Code-Golf: one line PHP syntax

    - by Kendall Hopkins
    Explanation PHP has some holes in its' syntax and occasionally in development a programmer will step in them. This can lead to much frustration as these syntax holes seem to exist for no reason. For example, one can't easily create an array and access an arbitrary element of that array on the same line (func1()[100] is not valid PHP syntax). The workaround for this issue is to use a temporary variable and break the statement into two lines, but sometimes that can lead to very verbose, clunky code. Challenge I know of a few of these holes (I'm sure there are more). It is quite hard to even come up with a solution, let alone in a code-golf style. Winner is the person with in the least characters total for all four Syntax Holes. Rules Statement must be one line in this form: $output = ...;, where ... doesn't contain any ;'s. Only use standard library functions (no custom functions allowed) Statement works identically to the assumed functional of the non-working syntax (even in cases that it fails). Statement must run without syntax error of any kind with E_STRICT | E_ALL. Syntax Holes $output = func_return_array()[$key]; - accessing an arbitrary offset (string or integer) of the returned array of a function $output = new {$class_base.$class_suffix}(); - arbitrary string concatenation being used to create a new class $output = {$func_base.$func_suffix}(); - arbitrary string concatenation being called as function $output = func_return_closure()(); - call a closure being returned from another function

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  • Powershell function that creates a array by input

    - by user2971548
    I'm quite new to Powershell and working on a little project with functions. What I'm trying to do is creating a function that takes 2 arguments. The first argument ($Item1) decides the size of the array, the second argument ($Item2) decides the value of the indexes. So if I write: $addToArray 10 5 I need the function to create a array with 10 indexes and the value 5 in each of them. The second argument would also have to take "text" as a value. This is my code so far. $testArray = @(); $indexSize = 0; function addToArray($Item1, $Item2) { while ($indexSize -ne $Item1) { $indexSize ++; } Write-host "###"; while ($Item2 -ne $indexSize) { $script:testArray += $Item2; $Item2 ++; } } Any help is appreciated. Kind regards Dennis Berntsson

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  • I want to move 1 array to another in C#

    - by George
    Hi, This is just a quick question in C#. I have a scenario where I am working with several devices that all have slightly different data to work with. When I work out which device I am using, I want to set up a common array to use throughout the code, say arrayCommon. So I want to move the info from device1 to the common array. Do I have to do this in a loop for each occurance in the array or can u move the whole array into the common array, as you could in Cobol all those years ago ? Thanks, George.

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  • error LNK2019 and fatal error LNK1120 i get these errors in c++.

    - by user320950
    #include <iostream> #include <fstream> using namespace std; int read_file_in_array(int exam[100][3]); double calculate_total(int exam1[], int exam2[], int exam3[]); // function that calcualates grades to see how many 90,80,70,60 //void display_totals(); double exam[100][3]; int read_file_in_array(double exam[100][3]) { ifstream infile; int exam1[100]; int exam2[100]; int exam3[100]; infile.open("grades.txt");// file containing numbers in 3 columns if(infile.fail()) // checks to see if file opended { cout << "error" << endl; } int num, i=0,j=0; while(!infile.eof()) // reads file to end of line { for(i=0;i<100;i++) // array numbers less than 100 { for(j=0;j<3;j++) // while reading get 1st array or element infile >> exam[i][j]; infile >> exam[i][j]; infile >> exam[i][j]; cout << exam[i][j] << endl; { if (! (infile >> exam[i][j]) ) cout << exam[i][j] << endl; } exam[i][j]=exam1[i]; exam[i][j]=exam2[i]; exam[i][j]=exam3[i]; } infile.close(); } return 0; } i have no idea how to get these errors out. i wrote the whole code over and tried to see if it was a problem with brackets but that doesnt help either. i dont know what line it is but i believe it is in this function. error LNK2019: unresolved external symbol "int __cdecl read_file_in_array(int (* const)[3])" (?read_file_in_array@@YAHQAY02H@Z) referenced in function _main fatal error LNK1120: 1 unresolved externals // i believe this one has to do with brackets double calculate_total(int exam1[],int exam2[],int exam3[]) { int calc_tot,above90=0, above80=0, above70=0, above60=0,i,j, fail=0; int exam[100][3]; calc_tot=read_file_in_array(exam); for(i=0;i<100;i++) { exam1[i]=exam[100][0]; exam2[i]=exam[100][1]; exam3[i]=exam[100][2]; if(exam[i][j] <=90 && exam[i][j] >=100) { above90++; { if(exam[i][j] <=80 && exam[i][j] >=89) { above80++; { if(exam[i][j] <=70 && exam[i][j] >=79) { above70++; { if(exam[i][j] <=60 && exam[i][j] >=69) { above60++; { if(exam[i][j] >=59) { fail++; } } } } } } } } } } return 0; } int main() { int go,go2,go3; int exam[100][3]; int exam1[100]; int exam2[100]; int exam3[100]; go=read_file_in_array(exam); go2=calculate_total(exam1,exam2,exam3); //go3=display_totals(); cout << go,go2,go3; return 0; }

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  • Android which button index from array was pressed

    - by Tim Wayne
    How do I set up a OnClickListener to simply tell me which index button was pressed from an array of buttons. I can change text and color of these buttons using the array. I set them up like this. TButton[1] = (Button)findViewById(R.id.Button01); TButton[2] = (Button)findViewById(R.id.Button02); TButton[3] = (Button)findViewById(R.id.Button03); up to 36.

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  • Jquery Ajax Returned Array - how to handle in Javascript

    - by user232840
    Hi there, If someone could assist me please. I'm doing a jquery Ajax post, for some reason the Json object isn't working so just returning a php array instead $.post ( "classes/RegisterUser.php", $("#frmRegistration").serialize(), function(data) { alert(data); } ); The data is returned to Javascript 100% as array ( [key]=>value [Name] => SomeOneName [Surname] => SomeOneSurName ) How would i go about getting the value of Surname in Javascript? Thanks for your assistance? Regards

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  • PHP search multidimensional array for value, then place that element at start of array

    - by BobFlemming
    I need to search this array: cars - [0] -make : Ford -model: Escort -year: 1991 [1] -make: Honda -model: Civic -year: 1996 [2] -make: Vauxhall -model: Astra -year: 1972 And if (for example) the model is "Civic" , place that 'car' at position 0. So the end array would be like: cars - [0] -make: Honda -model: Civic -year: 1996 [1] -make : Ford -model: Escort -year: 1991 [2] -make: Vauxhall -model: Astra -year: 1972 I've tried some usort variations: function typeSort($a, $b) { if ($a['model'] == 'Civic' ) { return 0; } return ($a['model'] < $b['model']) ? -1 : 1; } but this is just returning 1

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  • PHP array value becomes blank. What is going on?

    - by Michael Bruce
    I have written a web page that works fine expect for some weird behavior. The code below gets all expected values and populates them correctly except for $v-data["quick_phone_id"] and $v-data["quick_email_id"] which are integers. Those values come out blank in the string I am creating. The value for $v-data["id"] is another integer and works as expected. My only clue is that when I uncomment the commented out line, the code works properly. So I'm guessing this has to do with referencing getting broken for the array. Any ideas? I'd like to fix my code and my PHP knowledge. $contacts = ContactInfo::loadMyContacts($userId); $sb = new StringBuilder(); $idx = 0; //$vals = "vals: ".$contacts[0]->data["quick_phone_id"]; $sb->append(' dataRows = ['); foreach($contacts as $k => $v) { $sb->append('{ id:"'.strval($v->data["id"]).'",'); $sb->append('url:"edit_contact.php?id='.$v->data["id"].'",'); $sb->append('gname:"'.$v->data["given_name"].'",'); $sb->append('fname:"'.$v->data["family_name"].'",'); $sb->append('phone1id2:"'.strval($v->data["quick_phone_id"]).'",'); $sb->append('phone1type:"'.$v->data["quick_phone_type"].'",'); $sb->append('phone1:"'.$v->data["quick_phone"].'",'); $sb->append("email1id2:'".strval($v->data["quick_email_id"])."',"); $sb->append('email1type:"'.$v->data["quick_email_type"].'",'); $sb->append("email1:'".$v->data["quick_email"]."',"); $sb->append("dirty:false },\n"); } $sb->append('];');

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  • Get value of element in Multi-Dimensional Array

    - by George
    Here is my foreach loop to get at the values from a multi-dimensional array $_coloredvariables = get_post_meta( $post->ID, '_coloredvariables', true ); foreach ($_coloredvariables as $key => $value) { var_dump($value); } Which outputs this: array 'label' => string 'Color' (length=5) 'size' => string 'small' (length=5) 'displaytype' => string 'square' (length=6) 'values' => array 'dark-night-angel' => array 'type' => string 'Image' (length=5) 'color' => string '#2c4065' (length=7) 'image' => string '' (length=0) 'forest-green' => array 'type' => string 'Color' (length=5) 'color' => string '#285d5f' (length=7) 'image' => string '' (length=0) 'voilet' => array 'type' => string 'Color' (length=5) 'color' => string '#6539c9' (length=7) 'image' => string '' (length=0) 'canary-yellow' => array 'type' => string 'Color' (length=5) 'color' => string 'grey' (length=4) 'image' => string '' (length=0) And then to only get the values array I can do this: foreach ($_coloredvariables as $key => $value) { var_dump($value['values']); } which outputs this: array 'dark-night-angel' => array 'type' => string 'Image' (length=5) 'color' => string '#2c4065' (length=7) 'image' => string '' (length=0) 'forest-green' => array 'type' => string 'Color' (length=5) 'color' => string '#285d5f' (length=7) 'image' => string '' (length=0) 'voilet' => array 'type' => string 'Color' (length=5) 'color' => string '#6539c9' (length=7) 'image' => string '' (length=0) 'canary-yellow' => array 'type' => string 'Color' (length=5) 'color' => string 'grey' (length=4) 'image' => string '' (length=0) What I can't figure out is how to get these elements in the array structure "dark-night-angel", "forest-green", "voilet", "canary-yellow" Without using specific names: var_dump($value['values']['dark-night-angel']) Something that is more dynamic, of course this doesn't work: var_dump($value['values'][0][0]); thanks

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  • Removing entry from table

    - by Bnhjhvbq7
    Can't remove an entry from table. here's my code dropItem = dropList[ math.random( #dropList ) ] dropSomething[brick.index] = crackSheet:grabSprite(dropItem, true) dropSomething[brick.index].x = brick.x dropSomething[brick.index].y = brick.y dropSomething[brick.index].name = dropItem dropSomething[brick.index].type = "dropppedItems" collision function bounce(event) local item = event.other if item.type == "dropppedItems" then if item.name == "bomb" then Lives = Lives - 1 LivesNum.text = tostring(Lives) end item:removeSelf(); end end What I've tried: item:removeSelf(); - removes the whole table item = nil - seams to do nothing, the object continue to move and i still see the image

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  • problems with async jquery and loops

    - by Seth Vargo
    I am so confused. I am trying to append portals to a page by looping through an array and calling a method I wrote called addModule(). The method gets called the right number of times (checked via an alert statement), in the correct order, but only one or two of the portals actually populate. I have a feeling its something with the loop and async, but it's easier explained with the code: moduleList = [['weather','test'],['test']]; for(i in moduleList) { $('#content').append(''); for(j in moduleList[i]) { addModule(i,moduleList[i][j]); //column,name } } function addModule(column,name) { alert('adding module ' + name); $.get('/modules/' + name.replace(' ','-') + '.php',function(data){ $('#'+column).append(data); }); } for each array in the main array, I append a new column, since that's what each sub-array is - a column of portals. Then I loop through that sub array and call addModule on that column and the name of that module (which works correctly). Something buggy happens in my addModule method that it only adds the first and last modules, or sometimes a middle one, or sometimes none at all... im so confused!

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  • Convert inline image tags like [image:123:title:size] into HTML img tags

    - by Jacques Joubert
    I am looking for help with regular expression $pattern to convert inline image tags like [image:123:title:size] into HTML img tags. here is the code: //[image:ID:caption:size] $content = '[image:38:title:800x900]'; preg_match_all( '/\[image:(\d+)(:?)([^\]]*)\]/i', $content, $images ); if( !empty( $images[0] ) ) { // There are image inline tags in the content foreach( $images[0] as $i => $tag ) { $link_ID = (int)$images[1][$i]; $caption = empty( $images[2][$i] ) ? '#' : $images[3][$i]; $size = empty( $images[4][$i] ) ? '#' : $images[4][$i]; } echo '<br />'; echo 'ID: '.$link_ID.'<br />'; echo 'Tag: '.$caption.'<br />'; echo 'size: '.$size.'<br />'; } which outputs: ID: 12 Tag: caption:size size: # Any help would be great!

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  • slicing 2d numpy array

    - by MedicalMath
    I have a 2d numpy array called FilteredOutput that has 2 columns and 10001 rows, though the number of rows is a variable. I am trying to take the 2nd column of FilteredOutput and use it to populate a new 1d numpy array called timeSeriesArray using the following line of code: timeSeriesArray=p.array(FilteredOutput[:,0]) I got this syntax from the following link. But the problem is that I am getting the following error message: TypeError: list indices must be integers, not tuple Can anyone show me the proper syntax for populating the 1d array timeSeriesArray with the contents of the second column of the 2d array FilteredOutput?

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  • jQuery, array form radio button name problem.

    - by borayeris
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>click div to select hidden options</title> <script type="text/javascript" src="jquery-1.4.4.js"></script> <style type="text/css"> .clickDiv { width:50px; height:50px; cursor:crosshair; } .red {border:1px #000 solid;} .green {border:1px #000 solid;} .redBG {background:#F00;} .greenBG {background:#0F0;} </style> <script type="text/javascript"> $(function() { $('div.clickDiv.red').click(function(){ var secilenMadde=$(this).attr('madde'); $('div#write').text(secilenMadde); $('input[name='+secilenMadde+'][value=red]').attr('checked', 'checked'); $('div.clickDiv.red[madde='+secilenMadde+']').addClass('redBG'); $('div.clickDiv.green[madde='+secilenMadde+']').removeClass('greenBG'); }); $('div.clickDiv.green').click(function(){ var secilenMadde=$(this).attr('madde'); $('div#write').text(secilenMadde); $('input[name='+secilenMadde+'][value=green]').attr('checked', 'checked'); $('div.clickDiv.green[madde='+secilenMadde+']').addClass('greenBG'); $('div.clickDiv.red[madde='+secilenMadde+']').removeClass('redBG'); }); }); </script> </head> <body> <div id="write"></div> <form id="formId" name="formName" method="post"> <table> <tr> <td><div class="clickDiv red" madde="line1"></div></td> <td><div class="clickDiv green" madde="line1"></div></td> </tr> <tr> <td><div class="clickDiv red" madde="line2"></div></td> <td><div class="clickDiv green" madde="line2"></div></td> </tr> </table> <label for="line1red"><input id="line1red" type="radio" name="line1" value="red" /> Red</label> <label for="line1green"><input id="line1green" type="radio" name="line1" value="green" /> Green</label><br /> <label for="line2red"><input type="radio" name="line2" value="red" /> Red</label> <label for="line2green"><input type="radio" name="line2" value="green" /> Green</label> </form> </body> </html> This works. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>click div to select hidden options</title> <script type="text/javascript" src="jquery-1.4.4.js"></script> <style type="text/css"> .clickDiv { width:50px; height:50px; cursor:crosshair; } .red {border:1px #000 solid;} .green {border:1px #000 solid;} .redBG {background:#F00;} .greenBG {background:#0F0;} </style> <script type="text/javascript"> $(function() { $('div.clickDiv.red').click(function(){ var secilenMadde=$(this).attr('madde'); $('div#write').text(secilenMadde); $('input[name='+secilenMadde+'][value=red]').attr('checked', 'checked'); $('div.clickDiv.red[madde='+secilenMadde+']').addClass('redBG'); $('div.clickDiv.green[madde='+secilenMadde+']').removeClass('greenBG'); }); $('div.clickDiv.green').click(function(){ var secilenMadde=$(this).attr('madde'); $('div#write').text(secilenMadde); $('input[name='+secilenMadde+'][value=green]').attr('checked', 'checked'); $('div.clickDiv.green[madde='+secilenMadde+']').addClass('greenBG'); $('div.clickDiv.red[madde='+secilenMadde+']').removeClass('redBG'); }); }); </script> </head> <body> <div id="write"></div> <form id="formId" name="formName" method="post"> <table> <tr> <td><div class="clickDiv red" madde="line[1]"></div></td> <td><div class="clickDiv green" madde="line[1]"></div></td> </tr> <tr> <td><div class="clickDiv red" madde="line[2]"></div></td> <td><div class="clickDiv green" madde="line[2]"></div></td> </tr> </table> <label for="line1red"><input id="line1red" type="radio" name="line[1]" value="red" /> Red</label> <label for="line1green"><input id="line1green" type="radio" name="line[1]" value="green" /> Green</label><br /> <label for="line2red"><input type="radio" name="line[2]" value="red" /> Red</label> <label for="line2green"><input type="radio" name="line[2]" value="green" /> Green</label> </form> </body> </html> This doesn't. I need input names as an array but it breaks my script. Why?

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