v1.10.0

lib/caches.js

@@ -0,0 +1,28 @@
+'use strict';
+
+let cache = module.exports.cache = new Map();
+
+module.exports.push = (name, value) => {
+    if (!cache.has(name)) {
+        cache.set(name, []);
+    } else if (!Array.isArray(cache.get(name))) {
+        cache.set(name, [].concat(cache.get(name) || []));
+    }
+    cache.get(name).push(value);
+};
+
+module.exports.shift = name => {
+    if (!cache.has(name)) {
+        return false;
+    }
+    if (!Array.isArray(cache.get(name))) {
+        let value = cache.get(name);
+        cache.delete(name);
+        return value;
+    }
+    let value = cache.get(name).shift();
+    if (!cache.get(name).length) {
+        cache.delete(name);
+    }
+    return value;
+};