Asort

ASORT( ArrayName [, nStartElement [, nNumberSorted [, nSortOrder [, nFlags]]]) Parameters ArrayName Specifies the name of the array to sort. nStartElement Specifies the starting element of the sort. If you omit nStartElement, the array is sorted starting with the first array element by default. If the array is one-dimensional, the sort includes nStartElement. If the array is two-dimensional, the starting element nStartElement determines both the row where the sort begins and the column that determines the sort order of the rows. Note You can refer to an element in a two-dimensional array in one of two ways. The first method uses two subscripts to specify the row and column position of the element in the array; the other method uses an element number. This function and others that manipulate two-dimensional arrays require element numbers (in ASORT() the numeric expressions nStartElement and nNumberSorted). You can use AELEMENT( ) to return the element number from row and column subscripts in a two-dimensional array. The following example illustrates that the starting element nStartElement determines how the rows in a two-dimensional array are sorted. A small array named gaArray is created and sorted twice. The first sort begins with the first element of gaArray; the rows are sorted based on the values contained in the first column of the array. The second sort begins with the fourth element of gaArray; the rows are sorted based on the values contained in the second column. ...

I am trying to sort by a column(s) in the following data structure that I have built like this: $counter = 1; $entity_list = array(); foreach($result as $rec)//end foreach This is a var_dump of the $entity_list data structure. array (size=150) 1 => array (size=3) 'student_first_name' => string 'Jane' (length=6) 'student_last_name' => string 'Smith' (length=7) 'course_name' => string 'Algebra 1A-MOD' (length=14) 2 => array (size=3) 'student_first_name' => string 'Fred' (length=6) 'student_last_name' => string 'Jones' (length=7) 'course_name' => string 'Algebra 1A-MOD' (length=14) . . . How do I use asort() or ksort() on this structure? I think i should be using ksort(), as it works on a key. I have tried ksort($entity_list,'student_last_name'), or asort($entity_list,'current_grade') for example. Thank you. If you can use MySQL do this with it. Or try array_multisort() like this: $data[] = array('volume' => 67, 'edition' => 2); $data[] = array('volume' => 86, 'edition' => 1); $data[] = array('volume' => 85, 'edition' => 6); foreach ($data as $key => $row) array_multisort($volume, SORT_DESC, $edition, SORT_ASC, $data); From what I know or have tested on, php 5+ is more stable for this function. function orderBy($data=NULL,$field='order',$order='asc') It may be usable for common situations. PHP 5.4 > function arraySortByCol(&$arr, $col, $dir = 'asc') Thanks for contributing an answer to Stack Overflow! • Please be sure to answer the question. Provide details and share your ...

arsort( array &$array, int $flags = SORT_REGULAR): true Sorts array in place in descending order, such that its keys maintain their correlation with the values they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant. Note: If two members compare as equal, they retain their original order. Prior to PHP 8.0.0, their relative order in the sorted array was undefined. Note: Resets array's internal pointer to the first element. If you need to sort a multi-demension array, for example, an array such as $TeamInfo[$TeamID]["WinRecord"] $TeamInfo[$TeamID]["LossRecord"] $TeamInfo[$TeamID]["TieRecord"] $TeamInfo[$TeamID]["GoalDiff"] $TeamInfo[$TeamID]["TeamPoints"] and you have say, 100 teams here, and want to sort by "TeamPoints": first, create your multi-dimensional array. Now, create another, single dimension array populated with the scores from the first array, and with indexes of corresponding team_id... ie $foo[25] = 14 $foo[47] = 42 or whatever. Now, asort or arsort the second array. Since the array is now sorted by score or wins/losses or whatever you put in it, the indices are all hoopajooped. If you just walk through the array, grabbing the index of each entry, (look at the asort example. that for loop does just that) then the index you get will point right back to one of the values of the multi-dimensional array. Not sure if that's clear, but mail me if it isn't... -mo I have two servers; one running 5.6 an...

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• • • • ufunc ) • • • • • • numpy.ctypeslib ) • • • numpy.dual ) • • • numpy.fft ) • • • • numpy.linalg ) • • • • numpy.matlib ) • • • • numpy.random ) • • • • • • • • • • • • • • • • • • • • • • numpy.testing ) • • numpy.typing ) • • numpy.distutils ) • • numpy.distutils and migration advice • • • • numpy.sort numpy. sort ( a, axis = -1, kind = None, order = None ) [source] Return a sorted copy of an array. Parameters : a array_like Array to be sorted. axis int or None, optional Axis along which to sort. If None, the array is flattened before sorting. The default is -1, which sorts along the last axis. kind , optional Sorting algorithm. The default is ‘quicksort’. Note that both ‘stable’ and ‘mergesort’ use timsort or radix sort under the covers and, in general, the actual implementation will vary with data type. The ‘mergesort’ option is retained for backwards compatibility. Changed in version 1.15.0.: The ‘stable’ option was added. order str or list of str, optional When a is an array with fields defined, this argument specifies which fields to compare first, second, etc. A single field can be specified as a string, and not all fields need be specified, but unspecified fields will still be used, in the order in which they come up in the dtype, to break ties. Returns : sorted_array ndarray Array of the same type and shape as a. See also ndarray.sort Method to sort an array in-place. argsort Indirect sort. lexsort Indirect stable sort on multiple keys. searchsorted Find e...

ksort( array &$array, int $flags = SORT_REGULAR): true Sorts array in place by keys in ascending order. Note: If two members compare as equal, they retain their original order. Prior to PHP 8.0.0, their relative order in the sorted array was undefined. Note: Resets array's internal pointer to the first element. Parameters array The input array. flags The optional second parameter flags may be used to modify the sorting behavior using these values: Sorting type flags: • SORT_REGULAR - compare items normally; the details are described in the • SORT_NUMERIC - compare items numerically • SORT_STRING - compare items as strings • SORT_LOCALE_STRING - compare items as strings, based on the current locale. It uses the locale, which can be changed using • SORT_NATURAL - compare items as strings using "natural ordering" like • SORT_FLAG_CASE - can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort strings case-insensitively A nice way to do sorting of a key on a multi-dimensional array without having to know what keys you have in the array first: "Bob" , "age" => 8 , "colour" => "red" ), array( "name" => "Greg" , "age" => 12 , "colour" => "blue" ), array( "name" => "Andy" , "age" => 5 , "colour" => "purple" )); var_dump ( $people ); $sortArray = array(); foreach( $people as $person ) There's no checking on whether your array keys exist, or the array data you are searching on is actually there, but easy enough to add. The first thing that I didn't find in description ...