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vant/wxs/memoize.wxs

@@ -0,0 +1,39 @@
+function isPrimitive(value) {
+    var type = typeof value;
+    return ((type === 'boolean' || type === 'number' || type === 'string' || type === 'undefined' || value === null))
+};
+
+function call(fn, args) {
+    if (args.length === 2) {
+        return (fn(args[(0)], args[(1)]))
+    };
+    if (args.length === 1) {
+        return (fn(args[(0)]))
+    };
+    return (fn())
+};
+
+function serializer(args) {
+    if (args.length === 1 && isPrimitive(args[(0)])) {
+        return (args[(0)])
+    };
+    var obj = ({});
+    for (var i = 0; i < args.length; i++) {
+        obj[((nt_5 = ('key' + i), null == nt_5 ? undefined : 'number' === typeof nt_5 ? nt_5 : "" + nt_5))] = args[((nt_6 = (i), null == nt_6 ? undefined : 'number' === typeof nt_6 ? nt_6 : "" + nt_6))]
+    };
+    return (JSON.stringify(obj))
+};
+
+function memoize(fn) {
+    arguments.length = arguments.length;
+    var cache = ({});
+    return ((function() {
+        arguments.length = arguments.length;
+        var key = serializer(arguments);
+        if (cache[((nt_7 = (key), null == nt_7 ? undefined : 'number' === typeof nt_7 ? nt_7 : "" + nt_7))] === undefined) {
+            cache[((nt_8 = (key), null == nt_8 ? undefined : 'number' === typeof nt_8 ? nt_8 : "" + nt_8))] = call(fn, arguments)
+        };
+        return (cache[((nt_9 = (key), null == nt_9 ? undefined : 'number' === typeof nt_9 ? nt_9 : "" + nt_9))])
+    }))
+};
+module.exports.memoize = memoize;