From 2afb23928e1984d475cc460e1672e8f6fa0e4dbe Mon Sep 17 00:00:00 2001 From: Marshall Lochbaum Date: Wed, 11 Aug 2021 17:21:31 -0400 Subject: Allow clicking on header to get fragment link --- docs/doc/fromJ.html | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) (limited to 'docs/doc/fromJ.html') diff --git a/docs/doc/fromJ.html b/docs/doc/fromJ.html index 46d312be..10dff0d7 100644 --- a/docs/doc/fromJ.html +++ b/docs/doc/fromJ.html @@ -4,15 +4,15 @@ BQN–J dictionary
(github) / BQN / doc
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BQN–J dictionary

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BQN–J dictionary

A guide to help users of J get up to speed with BQN quickly.

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Terminology

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Array model

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Terminology

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Array model

BQN uses the based array model, which is fundamentally different from J's flat array model. BQN uses non-array values such as characters and numbers, called "atoms", while in J every noun is an array. A BQN array can contain any values in any mixture, while a J array must be uniformly numbers, characters, or boxes (BQN doesn't use boxes).

The J terms "atom" and "element" are used to mean different things by different authors. In BQN, an atom or rank-0 array is called a "unit", and the values contained in an array—which may or may not be arrays—are called "elements". Each element is contained in a 0-cell, or rank-0 subarray. BQN uses the term "major cell" for what J calls an "item" of an array: a cell with rank one less than that array. BQN shares the terms "list" and "table" for rank-1 and rank-2 arrays with J.

BQN uses "depth" rather than "boxing level". BQN gives atoms depth 0, so that the depth of a BQN array is one higher than the boxing level of the corresponding J array.

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Roles

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Roles

In J, the part of speech is an inherent property of a value, while in BQN it is determined by how the value is used in a particular expression, and can be different from the value's type. See context-free grammar.

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Syntax

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Syntax

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BQN's explicit functions and modifiers are called "blocks", and have a more sophisticated syntax than J; see the documentation. BQN uses lexical scope, and has no global variables. BQN also has a list notation using ⟨⟩.

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For reading

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For reading

J analogues of BQN primitive functions are given below. They are not always the same; usually this is because BQN has extra functionality relative to J, although in some cases it has less or different functionality.

Functions + - | < > are the same in both languages.

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For writing

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For writing

J's primitive nouns are easily defined in BQN.

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