associative-array

Based on an associative array in a Bash script, I need to iterate over it to get the key and value. #!/bin/bash declare -A array array[foo]=bar array[bar]=foo I actually don't understand how to get the key while using a for-in loop. The keys are accessed using an exclamation point: ${!array[@]} , the values are accessed using ${array[@]} . You can iterate over the key/value pairs like this: for i in "${!array[@]}" do echo "key : $i" echo "value: ${array[$i]}" done Note the use of quotes around the variable in the for statement (plus the use of @ instead of * ). This is necessary in case any

I have an array in this format: Array ( [0] => Array ( [28th February, 2009] => 'bla' ) [1] => Array ( [19th March, 2009] => 'bla' ) [2] => Array ( [5th April, 2009] => 'bla' ) [3] => Array ( [19th April, 2009] => 'bla' ) [4] => Array ( [2nd May, 2009] => 'bla' ) ) I want to sort them out in the ascending order of the dates (based on the month, day, and year). What's the best way to do that? Originally the emails are being fetched in the MySQL date format, so its possible for me to get the array in this state: Array [ ['2008-02-28']='some text', ['2008-03-06']='some text' ] Perhaps when its in

There is the following query results: (key1 and key2 could be any text) id key1 key2 value 1 fred apple 2 2 mary orange 10 3 fred banana 7 4 fred orange 4 5 sarah melon 5 ... and I wish to store the data in a grid (maybe as an array) looping all the records like this: apple orange banana melon fred 2 4 7 - mary - 10 - - sarah - - - 5 In PHP this would be really easy, using associative arrays: $result['fred']['apple'] = 2; But in JavaScript associative arrays like this doesn't work. After reading tons of tutorial, all I could get was this: arr=[]; arr[1]['apple'] = 2; but arr['fred']['apple'] =

How can I create and fetch associative arrays in Java like I can in PHP? For example: $arr[0]['name'] = 'demo'; $arr[0]['fname'] = 'fdemo'; $arr[1]['name'] = 'test'; $arr[1]['fname'] = 'fname'; Johan Sjöberg Java doesn't support associative arrays, however this could easily be achieved using a Map . E.g., Map<String, String> map = new HashMap<String, String>(); map.put("name", "demo"); map.put("fname", "fdemo"); // etc map.get("name"); // returns "demo" Even more accurate to your example (since you can replace String with any object that meet your needs) would be to declare: List<Map<String,

A PHP array can have arrays for its elements. And those arrays can have arrays and so on and so forth. Is there a way to find out the maximum nesting that exists in a PHP array? An example would be a function that returns 1 if the initial array does not have arrays as elements, 2 if at least one element is an array, and so on. Jeremy Ruten This should do it: <?php function array_depth(array $array) { $max_depth = 1; foreach ($array as $value) { if (is_array($value)) { $depth = array_depth($value) + 1; if ($depth > $max_depth) { $max_depth = $depth; } } } return $max_depth; } ?> Edit: Tested it

When interpolating PHP's string-indexed array elements (5.3.3, Win32) the following behavior may be expected or not: $ha = array('key1' => 'Hello to me'); print $ha['key1']; # correct (usual way) print $ha[key1]; # Warning, works (use of undefined constant) print "He said {$ha['key1']}"; # correct (usual way) print "He said {$ha[key1]}"; # Warning, works (use of undefined constant) print "He said $ha['key1']"; # Error, unexpected T_ENCAPSED_AND_WHITESPACE print "He said $ha[ key1 ]"; # Error, unexpected T_ENCAPSED_AND_WHITESPACE print "He said $ha[key1]"; # !! correct (How Comes?) Inerestingly