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== Unique features == | == Unique features == | ||
Despite its similarity However, it also differed in quite a few details:<ref>[[wikipedia:Burroughs Corporation|Burroughs Corporation]]. [http://www.softwarepreservation.org/projects/apl/Manuals/APL700UserReferenceManual User Reference Manual] (5000813). 1975.</ref> | Despite its similarity However, it also differed in quite a few details:<ref>[[wikipedia:Burroughs Corporation|Burroughs Corporation]]. [http://www.softwarepreservation.org/projects/apl/Manuals/APL700UserReferenceManual User Reference Manual] (5000813). 1975.</ref> | ||
* The statement separator was a semicolon (< | * The statement separator was a semicolon (<syntaxhighlight lang=apl inline>;</syntaxhighlight>) rather than the conventional diamond <syntaxhighlight lang=apl inline>⋄</syntaxhighlight> and statements in such a so-called ''list'' were evaluated from right to left, much as if the semicolon was the Left [[identity]] function (<syntaxhighlight lang=apl inline>⊣</syntaxhighlight>). | ||
* In primitive pairs with both a last and first [[axis]] version, for example < | * In primitive pairs with both a last and first [[axis]] version, for example <syntaxhighlight lang=apl inline>/</syntaxhighlight> vs <syntaxhighlight lang=apl inline>⌿</syntaxhighlight> and <syntaxhighlight lang=apl inline>⌽</syntaxhighlight> vs <syntaxhighlight lang=apl inline>⊖</syntaxhighlight>, the first axis version would use the [[function axis]] syntax to indicate the applicable axis counted from the ''last'' axis rather than from the first axis. For example <syntaxhighlight lang=apl inline>⊖[1]</syntaxhighlight> was equivalent to <syntaxhighlight lang=apl inline>⌽</syntaxhighlight> just like <syntaxhighlight lang=apl inline>⌽[1]</syntaxhighlight> was equivalent to <syntaxhighlight lang=apl inline>⊖</syntaxhighlight>. | ||
* While in general reduction using scalar functions were supported by for arrays of a compatible data type (numeric or character), < | * While in general reduction using scalar functions were supported by for arrays of a compatible data type (numeric or character), <syntaxhighlight lang=apl inline>=/</syntaxhighlight> and <syntaxhighlight lang=apl inline>≠/</syntaxhighlight> did not support character data. | ||
* APL/700 included [[modified assignment]], but the pass-through value was the new value of the updated array. | * APL/700 included [[modified assignment]], but the pass-through value was the new value of the updated array. | ||
* More [[set functions]] were included than even modern APLs have. In particular < | * More [[set functions]] were included than even modern APLs have. In particular <syntaxhighlight lang=apl inline>⊂</syntaxhighlight> and <syntaxhighlight lang=apl inline>⊂</syntaxhighlight> were Subset and Superset, though not strict subset and superset, but rather as <syntaxhighlight lang=apl inline>{∧/(,⍺)∊(,⍵)}</syntaxhighlight> and <syntaxhighlight lang=apl inline>{∧/(,⍵)∊(,⍺)}</syntaxhighlight>. All the set functions except for Membership were defined in terms of the [[ravel]] of the arguments, and thus always returned a [[vector]]. Furthermore, [[Union]] (<syntaxhighlight lang=apl inline>∪</syntaxhighlight>), [[Intersection]] (<syntaxhighlight lang=apl inline>∩</syntaxhighlight>), and [[Set difference]] (<syntaxhighlight lang=apl inline>~</syntaxhighlight>) returned only [[Unique]] elements, that is, a vector with no duplicates. | ||
* Format < | * Format <syntaxhighlight lang=apl inline>⍕</syntaxhighlight> allowed an advanced formatting specification through a character left argument. | ||
* Many additional [[quad name]]s were available, including a set of two-letter system functions with all the combinations of S/R/Q (for Stop, Reset, Query) with T/S/M (Trace, Stop, Monitor), and character constants for control characters (< | * Many additional [[quad name]]s were available, including a set of two-letter system functions with all the combinations of S/R/Q (for Stop, Reset, Query) with T/S/M (Trace, Stop, Monitor), and character constants for control characters (<syntaxhighlight lang=apl inline>⎕B</syntaxhighlight>, <syntaxhighlight lang=apl inline>⎕L</syntaxhighlight>, <syntaxhighlight lang=apl inline>⎕R</syntaxhighlight>, <syntaxhighlight lang=apl inline>⎕T</syntaxhighlight>, and <syntaxhighlight lang=apl inline>⎕N</syntaxhighlight> for Backspace, Linefeed, Return, Tab, and Null), the [[digits]] <syntaxhighlight lang=apl inline>⎕D</syntaxhighlight>, and the [[alphabet]] (<syntaxhighlight lang=apl inline>⎕A</syntaxhighlight>). | ||
* In a manner similar to, but more extensively than the much later [[APLX]], APL/700 had [[primitive function]]s for file operations. In addition to < | * In a manner similar to, but more extensively than the much later [[APLX]], APL/700 had [[primitive function]]s for file operations. In addition to <syntaxhighlight lang=apl inline>⍇</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍈</syntaxhighlight> for read and write operations (as in APLX), it supported the following: | ||
** < | ** <syntaxhighlight lang=apl inline>⍍</syntaxhighlight> to create, rename and change password for files, and <syntaxhighlight lang=apl inline>⍔</syntaxhighlight> for deleting files. | ||
** < | ** <syntaxhighlight lang=apl inline>⍃</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍄</syntaxhighlight> were used to read+pop and append components to the beginning and end of a file, respectively. | ||
** Equivalents of normal primitive functions for operations on component of files as if they were elements of a vectors: < | ** Equivalents of normal primitive functions for operations on component of files as if they were elements of a vectors: <syntaxhighlight lang=apl inline>⍐</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍗</syntaxhighlight> acted like [[Take]] and [[Drop]] (<syntaxhighlight lang=apl inline>↑</syntaxhighlight> and <syntaxhighlight lang=apl inline>↓</syntaxhighlight>). <syntaxhighlight lang=apl inline>⌼</syntaxhighlight> would [[Reverse]] and [[Rotate]] (<syntaxhighlight lang=apl inline>⌽</syntaxhighlight>). <syntaxhighlight lang=apl inline>⍁</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍂</syntaxhighlight> were [[Compress]] and [[Expand]] (<syntaxhighlight lang=apl inline>/</syntaxhighlight> and <syntaxhighlight lang=apl inline>\</syntaxhighlight>). | ||
** < | ** <syntaxhighlight lang=apl inline>⍓</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍌</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍗</syntaxhighlight> were used to hold, free, and release a file. | ||
** < | ** <syntaxhighlight lang=apl inline>⌸</syntaxhighlight> and <syntaxhighlight lang=apl inline>⍯</syntaxhighlight> returned maps for non-null and null components, respectively. | ||
** < | ** <syntaxhighlight lang=apl inline>⌻</syntaxhighlight> provided meta information about a file or the file system. | ||
== References == | == References == | ||
<references/> | <references/> | ||
{{APL dialects}}[[Category:APL dialects]][[Category:Flat array languages]] | {{APL dialects}}[[Category:APL dialects]][[Category:Flat array languages]] | ||