PHP array, how does $a={0,1,2,3} become $a={1,2,3,4]
PHP array, how does $a = {0,1,2,3} become $a = {1,2,3,4]. It is the dimension of the multi-dimensional array, and then adds 1 to the dimension and outputs it as the sequence number of the table, 1, 2, 3, 4 Reply to the discussion (solution) $a = array(0, 1, 2, 3);$b = range(1, count($a ));$c = array_combine($b, $a);print_r($c); Array ( [1] => 0 [2] => 1 [3] => 2 [4] => 3 ) $arr = array(0,1,2,3);$temp = array();foreach($arr as $k=>$v){ $k++; $temp[] = $k; }print_r($temp); The moderator’s is more beautiful! The moderator’s idea is beautiful, here is another idea.
How does the php array elegantly convert 1,2,4,5,6,7,9,11 into strings like ‘1,2,47,9,11’?
As the title There is a php array 1234 [1,2,4,5, 6,7,9,11] [7,11,16,17,18,33,102,103,555] Elegant conversion to 12 ‘1,2,4-7,9, 11’ ‘7,11,16-18,33,102-103,555’ like this What about strings? Thank you for your answer.
underscore knowledge points_error: partition(s) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,_cily_undefined’s blog
1. Installation Node. js –> npm install underscore Meteor.js –> meteor add underscore Require.js –> require([“underscore”], … Bower bower –> install underscore Component –> component install jashkenas/underscore Second, aggregate function (array or object) 1, each Syntax: _.each(list, iteratee, [context]) Description: Traverse all elements in the list, and call the iteratee function with each element as a parameter in order. If the context parameter is passed, bind iteratee to the context object. Each call to iteratee passes three parameters: (element, index, list). If list is a JavaScript object, the arguments to iteratee are (value, key, list)). Return a list to facilitate chain calls. Example: _.each([1, 2, 3], alert); => alerts each number in turn… _.each({one: 1, two: 2, three: 3}, alert); => alerts each number value in turn… 2, map Syntax: _.map(list, iteratee, [context]) Description: Generate a corresponding array by calling the conversion function (iteratee iterator) for each element in the list. iteratee passes three parameters: value, then the iteration index (or key Fool’s Wharf note: if the list is a JavaScript object, this parameter is the key), and the last one is a reference to the entire list. Example: _.map([1, 2, 3], function(num){ return num * 3; }); => [3,…
