multidimensional array in data structure

The distribution of data in multidimensional space is always sparse and uneven. At the location where the event occurs, the data is aggregated and the density is large. Therefore, developers of OLAP systems should try to solve the problem of data

1. Initialization of arrays(1) Create an array with arrayA: $products = array (' tires ', ' oil ', ' Spark plugs ');Array () is actually a language structure, not a function B: Initializing the related array$prices = Array (' Tires ' =>100, ' oil ' =

array_multisort-to sort multiple arrays or multidimensional arrays Description BOOL Array_multisort (array ar1 [, mixed arg [, mixed ... [, array ...]] ) Array_multisort (PHP 4, PHP 5) Returns TRUE if successful, and returns FALSE if it

Array_multisort (PHP 4, PHP 5) Array_multisort-Sort multiple arrays or multidimensional arrays Description BOOL Array_multisort (array ar1 [, mixed arg [, mixed ... [, array ...]] ) Returns TRUE if successful, and FALSE if it fails. Array_multisort

Array_multisort (PHP 4, PHP 5) Array_multisort--Sort multiple arrays or multidimensional arrays Description BOOL Array_multisort (array ar1 [, mixed arg [, mixed ... [, array ...]] ) Returns TRUE if successful, and returns FALSE if it

Sorting arrays of PHP arrays by multidimensional array The most powerful type in PHP is a non-array! Any type of data can be stored in an array. In the project development, the sorting of the array is a commonplace, this article mainly summarizes

Chapter Fifth multidimensional arrays and generalized TableI. Basic requirements, key points and difficult pointsThe purpose of this chapter is to introduce the logical structure characteristics of multidimensional arrays and how to store them. A

Sorting arrays of PHP arrays by multidimensional arrayThe most powerful type in PHP is a non-array! Any type of data can be stored in an array.In the project development, the sorting of the array is a commonplace, this article mainly summarizes some

1. The concept of arrays An array is a named range that is used to store a series of variable values. Each array element has an associated index (also a keyword) that can be used to access elements. PHP allows you to use numbers or strings evenly

For example, I have a multidimensional array $relationshop_list, which has IDs, with sort two columns, and I want the array to be sorted in descending order of ID, sorted in sort of way:Sort$array _field = Array_column ($relationshop _list, ' sort ')