BreizhHardware/memoizee
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Provide no-args handling out of a box

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This commit is contained in:
Mariusz Nowak
2014-05-01 11:35:48 +02:00
parent afc64e0543
commit f471af7835
4 changed files with 40 additions and 52 deletions
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22
index.js
View File

@@ -9,18 +9,18 @@ module.exports = function (fn/*, options*/) {
if (!options.normalizer) {
length = options.length = resolveLength(options.length, fn.length, options.async);
if (length === 0) {
options.normalizer = require('./normalizers/0');
} else if (options.primitive) {
if (length === false) {
options.normalizer = require('./normalizers/primitive');
} else if (length > 1) {
options.normalizer = require('./normalizers/get-primitive-fixed')(length);
if (length !== 0) {
if (options.primitive) {
if (length === false) {
options.normalizer = require('./normalizers/primitive');
} else if (length > 1) {
options.normalizer = require('./normalizers/get-primitive-fixed')(length);
}
} else {
if (length === false) options.normalizer = require('./normalizers/get')();
else if (length === 1) options.normalizer = require('./normalizers/get-1')();
else options.normalizer = require('./normalizers/get-fixed')(length);
}
} else {
if (length === false) options.normalizer = require('./normalizers/get')();
else if (length === 1) options.normalizer = require('./normalizers/get-1')();
else options.normalizer = require('./normalizers/get-fixed')(length);
}
}

35
lib/configure-map.js
View File

@@ -20,7 +20,7 @@ resolveArgs = function (args) {
};
module.exports = function (original, length, options) {
var cache = create(null), conf, memLength, get, set, del, clear
var cache = create(null), conf, memLength, get, set, del, clear, extDel
, getListeners, setListeners, deleteListeners, memoized, resolve, resolvers;
if (length !== false) memLength = length;
else if (isNaN(original.length)) memLength = 1;
@@ -73,6 +73,22 @@ module.exports = function (original, length, options) {
if (setListeners) conf.emit('set', id);
return result;
}, memLength);
} else if (length === 0) {
memoized = function () {
var result;
if (hasOwnProperty.call(cache, 'data')) {
if (getListeners) conf.emit('get', 'data', arguments, this);
return cache.data;
}
if (!arguments.length) result = call.call(original, this);
else result = apply.call(original, this, arguments);
if (hasOwnProperty.call(cache, 'data')) {
throw customError("Circular invocation", 'CIRCULAR_INVOCATION');
}
cache.data = result;
if (setListeners) conf.emit('set', 'data');
return result;
};
} else {
memoized = function (arg) {
var result, args = arguments;
@@ -126,18 +142,25 @@ module.exports = function (original, length, options) {
emit: emit,
updateEnv: function () { original = conf.original; }
};
defineProperties(memoized, {
__memoized__: d(true),
delete: d(get ? defineLength(function (arg) {
if (get) {
extDel = defineLength(function (arg) {
var id, args = arguments;
if (resolve) args = resolve(args);
id = get(args);
if (id === null) return;
conf.delete(id);
}, memLength) : function (arg) {
}, memLength);
} else if (length === 0) {
extDel = function () { return conf.delete('data'); };
} else {
extDel = function (arg) {
if (resolve) arg = resolve(arguments)[0];
return conf.delete(arg);
}),
};
}
defineProperties(memoized, {
__memoized__: d(true),
delete: d(extDel),
clear: d(conf.clear)
});
return conf;

3
normalizers/0.js
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@@ -1,3 +0,0 @@
'use strict';
module.exports = function () { return ''; };

32
test/normalizers/0.js
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@@ -1,32 +0,0 @@
'use strict';
var memoize = require('../..');
module.exports = {
"": function (a) {
var i = 0, fn = function () { ++i; return 3; };
fn = memoize(fn);
a(fn(), 3, "First");
a(fn(1), 3, "Second");
a(fn(5), 3, "Third");
a(i, 1, "Called once");
},
"Delete": function (a) {
var i = 0, fn, mfn, x = {};
fn = function (a, b, c) {
return a + (++i);
};
mfn = memoize(fn, { length: 0 });
a(mfn(3), 4, "Init");
a(mfn(5), 4, "Other");
a(i, 1, "Pre clear");
mfn.delete(6, x, 1);
a(i, 1, "After clear");
a(mfn(6, x, 1), 8, "Reinit");
a(i, 2, "Reinit count");
a(mfn(3, x, 1), 8, "Reinit Cached");
a(i, 2, "Reinit count");
}
};