associative-array

问题 Could someone please explain to me how the count function works with arrays like the one below? My thought would be the following code to output 4, cause there are 4 elements there: $a = array ( "1" => "A", 1=> "B", "C", 2 =>"D" ); echo count($a); 回答1: count works exactly as you would expect, e.g. it counts all the elements in an array (or object). But your assumption about the array containing four elements is wrong: "1" is equal to 1, so 1 => "B" will overwrite "1" => "A" . because you

问题 Trying to create the following: array( '12345' => 'A01', 'A02', 'A03' '22222' => 'B01', '33333' => 'C01', 'C02') So basically each key is different generated dynamically from another array. Let's say variable numbers has '12345' after certain event is fired. We have an array called location, this one will have for example ('A01', 'A02', 'A03') So then on a master array it will map both numbers with the location. This is the array that i will need to save each time there is an event. The on

问题 I am using parse_ini_file to parse an ini file using PHP. Now I first upload an INI file to my server then open it and allow user to mak custom changes to the file. Now once users has edited the file i get the data from post and save the file back to server. But Now i dont get my sections. INIdetails,Dialplan in the updated file so when i also want to write that to file how to do that? This is the code : $this->data['parameters'] = parse_ini_file($path.$filename,true); /*Getting Our POST DATA

问题 I dont know what to ask so i straight away went to show an example. Hope it helps though! Say i have an array array (size=3) 0 => array (size=3) 0 => int 1 1 => int 2 2 => int 3 2 => array (size=3) 0 => int 2 1 => int 3 2 => int 4 5 => array (size=3) 0 => int 5 1 => int 6 2 => int 7 Now i want to arrange it according to KEY so that it looks like array (size=3) 0 => array (size=3) 0 => int 1 1 => int 2 2 => int 3 1 => array (size=3) 0 => int 2 1 => int 3 2 => int 4 2 => array (size=3) 0 => int

问题 I would like to know how an associative array is constructed/implemented when used in shell scripts. Also, I want to know if the time complexity of shell script based associative arrays are optimal since we can use alphabets as well as numbers as their respective keys. EDIT: what hash function do they use?? 回答1: If you're using an associative array, you're not accessing it via "use alphabets as well as numbers as their respective keys"; You're using strings - any numbers are the character

问题 courses = [{ code: 'English', otherFields: '1', list: [{id:'1'},{name:'eng'}] }, { code: 'Spanish', otherFields: '2', list: [{id:'2'},{name:'spa'}] }, { code: 'German', otherFields: '3', list: [{id:'3'},{name:'ger'}] }] var resultSet = $.grep(courses.list, function (e) { return e.code.indexOf('German') == 0; }); console.log(JSON.stringify(resultSet)); What I want is: based on 'name' parameter I want to get everything in that particular object. Example: when I pass name=spa I should get ' id=2

问题 My code is: $itemArray = array(); foreach ($a->getDetails() as $b) { if ($b->getValue1() !== $b->getValue2()) { if (!array_key_exists($b->getId(), $itemArray)) { $itemArray[$b->getId()] = array('name' => $b->getName(), 'age' => $b->getAge()); } } } if (count($itemArray) > 0 && $b->getValue1() !== $b->getValue2()) { foreach($itemArray as $item) { $personName = $item['name']; $personAge = $item['age'] ; $content = ('Name is: ' . $personName . ', age is: ' . $personAge); } } $emailAddress =

问题 if I have an array with the following structure: $currencies = Array (7) 0 => Array (3) id => "11" code => "CHF" default => "0" 1 => Array (3) id => "13" code => "USD" default => "0" 2 => Array (3) id => "12" code => "EUR" default => "1" I would like to retrieve the 'code' when default is equal to '1', something like: if($currencies.default == 1 ){ $currency_code = EUR } That was just a rough example of my intention, I have no idea how to do it. Can anyone help me? 回答1: This should work for

问题 Hey I am trying to find a solution I am retrieving the data from mysql using this command : $meals = TableRegistry::get('Users'); $query = $meals ->find() ->select(['id' ,'username']) ->where(['role' => 'patient']); $data = $query->toArray(); This is my code after using query->toarray() I am getting this value { "id": 4, "username": "s2" } I want to put this value in my form which is like this : echo $this->Form->input('user_id', [ 'options' => [1 => 'Admin', 2 => 'Author'] ]) ; How to use

问题 I'm trying to work out a simple way to take a list, like this foo: Alpha bar: Bravo fooBar: Charlie And turn this into an associative array so that values would be $array['foo'] //would contain Alpha $array['bar'] //would contain Bravo etc. What is the cleanest way to achieve this ? 回答1: Something like this?: $string = "foo: Alpha bar: Bravo fooBar: Charlie"; $array = array(); $lines = explode("\n", $string); foreach ($lines as $line) { list($key, $value) = explode(": ", $line); $array[$key]