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Lists are typically implemented either as linked lists (either singly or doubly linked) or as arrays, usually variable length or dynamic arrays.. The standard way of implementing lists, originating with the programming language Lisp, is to have each element of the list contain both its value and a pointer indicating the location of the next element in the list.
is how one would use Fortran to create arrays from the even and odd entries of an array. Another common use of vectorized indices is a filtering operation. Consider a clipping operation of a sine wave where amplitudes larger than 0.5 are to be set to 0.5. Using S-Lang, this can be done by
Erlang also provides syntax sugar for functional updates—creating a new map based on an existing one, but with modified values or additional keys: PhoneBook2 = PhoneBook #{ % the `:=` operator updates the value associated with an existing key "J. Random Hacker" : = "355-7331" , % the `=>` operator adds a new key-value pair, potentially ...
In the Perl programming language, autovivification is the automatic creation of new arrays and hashes as required every time an undefined value is dereferenced. Perl autovivification allows a programmer to refer to a structured variable, and arbitrary sub-elements of that structured variable, without expressly declaring the existence of the ...
The fundamental idea behind array programming is that operations apply at once to an entire set of values. This makes it a high-level programming model as it allows the programmer to think and operate on whole aggregates of data, without having to resort to explicit loops of individual scalar operations.
Arrays of arrays in languages such as Java, PHP, Python (multidimensional lists), ... // 5 columns for row 0 c [1] = new int [3]; // create 3 columns for row 1. In C ...
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Symfony aims to speed up the creation and maintenance of web applications and to replace repetitive coding tasks. It's also aimed at building robust applications in an enterprise context, and aims to give developers full control over the configuration: from the directory structure to third-party libraries, almost everything can be customized. [2]