implementation

Author: ljharb

index.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var isMap = require('is-map');
+var isSet = require('is-set');
+var isWeakMap = require('is-weakmap');
+var isWeakSet = require('is-weakset');
+
+module.exports = function whichCollection(value) {
+	if (value && typeof value === 'object') {
+		if (isMap(value)) {
+			return 'Map';
+		}
+		if (isSet(value)) {
+			return 'Set';
+		}
+		if (isWeakMap(value)) {
+			return 'WeakMap';
+		}
+		if (isWeakSet(value)) {
+			return 'WeakSet';
+		}
+	}
+	return false;
+};

package.json

@@ -37,5 +37,11 @@
 		"for-each": "^0.3.3",
 		"object-inspect": "^1.7.0",
 		"tape": "^4.11.0"
+	},
+	"dependencies": {
+		"is-map": "^2.0.0",
+		"is-set": "^2.0.0",
+		"is-weakmap": "^2.0.0",
+		"is-weakset": "^2.0.0"
 	}
 }