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fgdata/Nasal/std/algorithm.nas
2023-02-13 11:05:48 +00:00

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# SPDX-FileCopyrightText: (C) 2023 Frederic Croix <thefgfseagle@gmail.com>
# SPDX-License-Identifier: GPL-2.0-or-later
var all = func(obj, key=nil) {
if (!size(obj)) {
return 0;
}
var res = 1;
if (key) {
if (!isfunc(key)) {
die("std.all got a non-callable 'key' argument");
}
foreach (var o; obj) {
res &= key(o);
if (res == 0) {
break;
}
}
} else {
foreach(var o; obj) {
res &= o;
if (res == 0) {
break;
}
}
}
return res;
};
var any = func(obj, key=nil) {
var res = 0;
if (key) {
if (!isfunc(key)) {
die("std.any got a non-callable 'key' argument");
}
foreach (var o; obj) {
res |= key(o);
if (res == 1) {
break;
}
}
} else {
foreach(var o; obj) {
res |= o;
if (res == 1) {
break;
}
}
}
return res;
};
var map = func(function, obj) {
if (!isfunc(function)) {
die("std.map got a non-callable 'function' argument");
}
var res = [];
foreach (var o; obj) {
append(res, function(o));
}
return res;
};
var filter = func(function, obj) {
var res = [];
if (function) {
if (!isfunc(function)) {
die("std.filter got a non-callable 'function' argument");
}
foreach (var o; obj) {
if (function(o)) {
append(res, o);
}
}
} elsif (o) {
foreach (var o; obj) {
if (o) {
append(res, o);
}
}
}
return res;
};