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Also note the keyboard had some 55 unique (68 listed per tables above, including comparative symbols but several symbols appear in both monadic and dyadic tables) APL symbol keys (55 APL functions (operators) are listed in IBM's 5110 APL Reference Manual), thus with the use of alt, shift and ctrl keys - it would theoretically have allowed a ...
APL (named after the book A Programming Language) [3] is a programming language developed in the 1960s by Kenneth E. Iverson. Its central datatype is the multidimensional array. It uses a large range of special graphic symbols [4] to represent most functions and operators, leading to
As of 2010, Unicode allows APL to be stored in text files, published in print and on the web, and shared through email and instant messaging. Entering APL characters still requires the use of either a specific input method editor or keyboard mapping, or of a specific touch interface. APL keyboard mappings are available for free for the most ...
This list may not reflect recent changes. ... Code page 293; Code page 310; Code page 351; D. Digital encoding of APL symbols; Direct function; E. ELI (programming ...
Since direct functions are dfns, APL functions defined in the traditional manner are referred to as tradfns, pronounced "trad funs". Here, dfns and tradfns are compared by consideration of the function sieve : On the left is a dfn (as defined above ); in the middle is a tradfn using control structures ; on the right is a tradfn using gotos ...
However, it relies heavily on the mutating list structure and similar imperative features. Kenneth E. Iverson developed APL in the early 1960s, described in his 1962 book A Programming Language (ISBN 9780471430148). APL was the primary influence on John Backus's FP. In the early 1990s, Iverson and Roger Hui created J.
Like APL, the primitive functions and operators are represented by single or double characters; however, unlike APL, K restricts itself to the ASCII character set (as does another APL variant, J). To allow for this, the set of primitive functions for K is smaller and heavily overloaded , with each of the ASCII symbols representing two or more ...
The function is evaluated from right to left: "til x" enumerate the non-negative integers less than x. "2_" drops the first two elements of the enumeration (0 and 1). "x mod" performs modulo division between the original integer and each value in the truncated list. "min" find the minimum value of the list of modulo result.