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basic: 'barely working' foldl function

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minjaesong
2020-12-09 19:18:07 +09:00
parent ac9087f7bf
commit 3ce8789bd8
1 changed files with 22 additions and 2 deletions
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24
assets/basic.js
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@@ -1057,18 +1057,38 @@ if no arg text were given (e.g. "10 NEXT"), args will have zero length
}); });
}, },
"DATA" : function() { /*DATA must do nothing when encountered; they must be pre-processed*/ }, "DATA" : function() { /*DATA must do nothing when encountered; they must be pre-processed*/ },
/* Syopsis: MAP function, functor
*/
"MAP" : function(lnum, args) { "MAP" : function(lnum, args) {
return twoArg(lnum, args, (fn, functor) => { return twoArg(lnum, args, (fn, functor) => {
// TODO test only works with DEFUN'd functions // TODO test only works with DEFUN'd functions
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet"); if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
if (functor.toArray === undefined && !isArray(functor)) throw lang.syntaxfehler(lnum, functor); if (functor.toArray === undefined && !Array.isArray(functor)) throw lang.syntaxfehler(lnum, functor);
// generator? // generator?
if (functor.toArray) functor = functor.toArray(); if (functor.toArray) functor = functor.toArray();
return functor.map(it => bStatus.getDefunThunk(lnum, fn)(lnum, [it])); return functor.map(it => bStatus.getDefunThunk(lnum, fn)(lnum, [it]));
}); });
}, },
/* Synopsis: FOLD function, init_value, functor
* a function must accept two arguments, of which first argument will be an accumulator
*/
"FOLD" : function(lnum, args) {
return threeArg(lnum, args, (fn, init, functor) => {
// TODO test only works with DEFUN'd functions
if (fn.astLeaves === undefined) throw lang.badFunctionCallFormat("Only works with DEFUN'd functions yet");
if (functor.toArray === undefined && !Array.isArray(functor)) throw lang.syntaxfehler(lnum, functor);
// generator?
if (functor.toArray) functor = functor.toArray();
let akku = init;
functor.forEach(it => {
akku = bStatus.getDefunThunk(lnum, fn)(lnum, [akku, it]);
});
return akku;
});
},
"OPTIONDEBUG" : function(lnum, args) { "OPTIONDEBUG" : function(lnum, args) {
return oneArgNum(lnum, args, (lh) => { return oneArgNum(lnum, args, (lh) => {
if (lh != 0 && lh != 1) throw lang.syntaxfehler(line); if (lh != 0 && lh != 1) throw lang.syntaxfehler(line);