foreach

问题 I have a PowerCLI script that powers off a VM, changes its memory and cpu, and then powers it back on. I've adapted the script to utilize variables. This all works perfectly. I'm now trying to modify the script to utilize arrays, in order to cycle through numerous VMs. The script portions that powers off and powers on the VMs works perfectly. The trouble I'm having is using variables from two arrays in a foreach loop. For each VM in $vm_name, I need to set the corresponding amount of memory

问题 I see these used interchangeably. What's the difference? 回答1: There is no difference. From perldoc perlsyn: The foreach keyword is actually a synonym for the for keyword, so you can use foreach for readability or for for brevity. 回答2: I see these used interchangeably. There is no difference other than that of syntax. 回答3: Four letters. They're functionally identical, just spelled differently. 回答4: Ever since its introduction in perl-2.0, foreach has been synonymous with for . It's a nod to

问题 I have a problem with printing my data. In my program, i get the data which was in object and put in an array. say array1[$id] = dataobject. the whole array1 then will be put to array2['list'] like array2['list'] = array1; the problem is how do i get the data such as the id, name and description.. here's the print_r of the whole array: this is actually the result of the array, i am not sure how to access this. i want to foreach and get the name and print them: Array ( [list] => Array ( [0] =>

问题 I'm using references to alter an array: foreach($uNewAppointments as &$newAppointment) { foreach($appointments as &$appointment) { if($appointment == $newAppointment){ $appointment['index'] = $counter; } } $newAppointment['index'] = $counter; $newAppointments[$counter] = $newAppointment; $counter++; } If I print the array contents, then I receive the expected result. When I iterate over it, all elements seem to be the same (the first). When I remove the reference operator & in the inner array

问题 i set up a multi select form to return arrays and then looped them through mysql query to return results i dont want duplicate results if the user selects multiple options and those options are in one record for example user selects three different 'Views' and one property has all three views i dont want that displayed in the results three times ... thank you if you can help require ('db.php'); $N = $_GET['Neigh']; $V = $_GET['view']; $C = $_GET['Con']; $F = $_GET['front']; $minPrice = $_GET[

问题 I need to split a field in different values and store each value in a different node. For each created node I want to store the position. Example: Sentence Words My car is red My;car;is;red Using: FOREACH (w IN SPLIT(line.TWords, ";") | MERGE (wd:Word {word: w}) I can split the field and store the different words, but I'd like to store the position on the relationship. My car is red -[HAS_WORD {position:1}]-> My My car is red -[HAS_WORD {position:2}]-> car My car is red -[HAS_WORD {position:3

问题 Merged with PHP JSON parsing giving an error. I was previously using this code and it worked perfectly fine, but when I put it on another server just now it started freaking out, I am passing a JSON object to a PHP file and traversing through it, the foreach I used seemd to work fine, but now I get "Invalid argument supplied for foreach", PHP: <?php $json = $_POST['systems']; $uid = $_POST['uid']; $test = json_decode($json, true); mysql_connect('localhost','user','password') or die(mysql

问题 The Problem: Hi! I'm making a file upload form where I can upload photos, I added multiple="" to the input and for the name="upload_photo[]" so I'm able to upload multiple files. When I print $_FILES['upload_photo'] I get this and I want to get the values of each key with foreach . So for example I want to get just [name] what will be egg.jpg and green.jpg . Array ( [name] => Array ( [0] => egg.jpg [1] => green.jpg ) [type] => Array ( [0] => image/jpeg [1] => image/jpeg ) [tmp_name] => Array

问题 I'm trying to run an analysis in parallel on our computing cluster. Unfortunately I've had to set up Rmpi myself and may not have done so properly. Because I had to install all necessary packages into my home folder, I always have to call .libPaths('/home/myfolder/Rlib'); before I can load packages. However, it appears that doMPI attempts to load itself, before I can set the library path. .libPaths('/home/myfolder/Rlib'); cat("Step 1") library(doMPI) cl <- startMPIcluster() registerDoMPI(cl)

问题 I have a form like below, and it is dynamically adding and removing fields. What I want to achieve is to insert all data from my form while it should not matter how many rows it has already present. <tr> <td><input name="model[]" type="text" class="input-large" id="A1" value="" /></td> <td><input name="color[]" type="text" class="input-small" id="Color1" value="" /></td> <td><input name="price[]" type="text" class="input-small" id="B1" value="" data-format="0,0[.]00" /></td> <td><input name=