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Smalltalk was one of many object-oriented programming languages based on Simula. [18] Smalltalk is also one of the most influential programming languages. [citation needed] Virtually all of the object-oriented languages that came after—Flavors, [19] CLOS, Objective-C, Java, Python, Ruby, [20] and many others—were influenced by Smalltalk.
function factorial (n is a non-negative integer) if n is 0 then return 1 [by the convention that 0! = 1] else if n is in lookup-table then return lookup-table-value-for-n else let x = factorial(n – 1) times n [recursively invoke factorial with the parameter 1 less than n] store x in lookup-table in the n th slot [remember the result of n! for ...
Graphs of functions commonly used in the analysis of algorithms, showing the number of operations versus input size for each function. The following tables list the computational complexity of various algorithms for common mathematical operations.
Though the early language resembled modern Factor superficially in terms of syntax, the modern language is very different in practical terms and the current implementation is much faster. The language has changed significantly over time. Originally, Factor programs centered on manipulating Java objects with Java's reflection capabilities. From ...
Let be a natural number. For a base >, we define the sum of the factorials of the digits [5] [6] of , :, to be the following: = =!. where = ⌊ ⌋ + is the number of digits in the number in base , ! is the factorial of and
This is contrasted with direct style, which is the usual style of programming. Gerald Jay Sussman and Guy L. Steele, Jr. coined the phrase in AI Memo 349 (1975), which sets out the first version of the Scheme programming language. [1] [2] John C. Reynolds gives a detailed account of the numerous discoveries of continuations. [3]
The release of Andrei Alexandrescu's book The D Programming Language on 12 June 2010, marked the stabilization of D2, which today is commonly referred to as just "D". In January 2011, D development moved from a bugtracker / patch-submission basis to GitHub. This has led to a significant increase in contributions to the compiler, runtime and ...
Equivalent results in APL: (⍳3)(⍳3) and ⍳¨3 3 << Rightmost expression is more concise. The matrix of 1s and 0s similarly produced by ∘.=/⍳¨3 3 and (⍳3)∘.=⍳3 is called an identity matrix .