diff --git a/Promise.js b/Promise.js
index e1fa695..9d2e7ab 100644
--- a/Promise.js
+++ b/Promise.js
@@ -464,6 +464,11 @@ object.Constructor('IterablePromise', Promise, {
 	every: promiseProxy('every'),
 
 
+	join: async function(){
+		return [...(await this)]
+			.join(...arguments) },
+
+
 	// this is defined globally as Promise.prototype.iter(..)
 	//
 	// for details see: PromiseMixin(..) below...
diff --git a/generator.js b/generator.js
index a9d0169..4cb7713 100644
--- a/generator.js
+++ b/generator.js
@@ -232,7 +232,7 @@ object.Mixin('GeneratorMixin', 'soft', {
 				return that(...arguments).toArray() },
 			{ toString: function(){
 				return that.toString() 
-					+ '\n    .toString()'}, }) },
+					+ '\n    .toArray()'}, }) },
 	gpop: makeGenerator('gpop'),
 	pop: function(){
 		var that = this
@@ -242,7 +242,7 @@ object.Mixin('GeneratorMixin', 'soft', {
 				return that(...arguments).pop() },
 			{ toString: function(){
 				return that.toString() 
-					+ '\n    .gpop()'}, }) },
+					+ '\n    .pop()'}, }) },
 	push: makeGenerator('push'),
 	gshift: makeGenerator('gshift'),
 	shift: function(){
@@ -253,7 +253,7 @@ object.Mixin('GeneratorMixin', 'soft', {
 				return that(...arguments).shift() }, 
 			{ toString: function(){
 				return that.toString() 
-					+ '\n    .gshift()'}, }) },
+					+ '\n    .shift()'}, }) },
 	unshift: makeGenerator('unshift'),
 
 	// promises...
@@ -277,6 +277,18 @@ object.Mixin('GeneratorMixin', 'soft', {
 	//zip: makeGenerator('zip'),
 	
 	enumerate: makeGenerator('enumerate'),
+
+	// XXX should this have a .gjoin(..) companion...
+	join: function(){
+		var args = [...arguments]
+		var that = this
+		return Object.assign(
+			function(){
+				//return that(...arguments).toArray().shift() }, 
+				return that(...arguments).join(...args) }, 
+			{ toString: function(){
+				return that.toString() 
+					+ '\n    .join()'}, }) },
 })
 
 
@@ -449,6 +461,10 @@ object.Mixin('GeneratorProtoMixin', 'soft', {
 		var i = 0
 		for(var e of this){
 			yield [i++, e] } },
+
+	join: function(){
+		return [...this]
+			.join(...arguments) },
 })
 
 
@@ -554,6 +570,10 @@ object.Mixin('AsyncGeneratorProtoMixin', 'soft', {
 		yield elem 
 		yield* this },
 
+	join: async function(){
+		return [...(await this)]
+			.join(...arguments) },
+
 	// XXX
 	// 	slice -- not sure if we need this...
 	// 	...
diff --git a/package-lock.json b/package-lock.json
index 0523651..1ef2fcf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "ig-types",
-  "version": "6.15.6",
+  "version": "6.15.7",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "ig-types",
-      "version": "6.15.6",
+      "version": "6.15.7",
       "license": "BSD-3-Clause",
       "dependencies": {
         "ig-object": "^6.0.0",
@@ -35,9 +35,9 @@
       }
     },
     "node_modules/@jridgewell/resolve-uri": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.0.8.tgz",
-      "integrity": "sha512-YK5G9LaddzGbcucK4c8h5tWFmMPBvRZ/uyWmN1/SbBdIvqGUdWGkJ5BAaccgs6XbzVLsqbPJrBSFwKv3kT9i7w==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.0.tgz",
+      "integrity": "sha512-F2msla3tad+Mfht5cJq7LSXcdudKTWCVYUgw6pLFOOHSTtZlj6SWNYAp+AhuqLmWdBO2X5hPrLcu8cVP8fy28w==",
       "dev": true,
       "engines": {
         "node": ">=6.0.0"
@@ -124,9 +124,9 @@
       }
     },
     "node_modules/c8": {
-      "version": "7.11.3",
-      "resolved": "https://registry.npmjs.org/c8/-/c8-7.11.3.tgz",
-      "integrity": "sha512-6YBmsaNmqRm9OS3ZbIiL2EZgi1+Xc4O24jL3vMYGE6idixYuGdy76rIfIdltSKDj9DpLNrcXSonUTR1miBD0wA==",
+      "version": "7.12.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-7.12.0.tgz",
+      "integrity": "sha512-CtgQrHOkyxr5koX1wEUmN/5cfDa2ckbHRA4Gy5LAL0zaCFtVWJS5++n+w4/sr2GWGerBxgTjpKeDclk/Qk6W/A==",
       "dev": true,
       "dependencies": {
         "@bcoe/v8-coverage": "^0.2.3",
@@ -351,9 +351,9 @@
       }
     },
     "node_modules/ig-stoppable": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ig-stoppable/-/ig-stoppable-2.0.0.tgz",
-      "integrity": "sha512-UfIQZI6kAPUbroocVRrgtH7cTulg8kfUoHo7EMvhiEjtzWvHDlzTotCRSeDmMtT1WyKn/1o7o3dwc9D5DNcvNA=="
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/ig-stoppable/-/ig-stoppable-2.0.1.tgz",
+      "integrity": "sha512-vos7eFNHryIg6yNzrWTV1QP1Sja5JkMU3nL2Y/YvSgU74l7w1Rx6yfVKoEHwNOex4MCkLsq6wMa91Ac6IWOtIA=="
     },
     "node_modules/ig-test": {
       "version": "1.5.4",
@@ -437,9 +437,9 @@
       }
     },
     "node_modules/istanbul-reports": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.4.tgz",
-      "integrity": "sha512-r1/DshN4KSE7xWEknZLLLLDn5CJybV3nw01VTkp6D5jzLuELlcbudfj/eSQFvrKsJuTVCGnePO7ho82Nw9zzfw==",
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.5.tgz",
+      "integrity": "sha512-nUsEMa9pBt/NOHqbcbeJEgqIlY/K7rVWUX6Lql2orY5e9roQOthbR3vtY4zzf2orPELg80fnxxk9zUyPlgwD1w==",
       "dev": true,
       "dependencies": {
         "html-escaper": "^2.0.0",
@@ -804,9 +804,9 @@
       "dev": true
     },
     "@jridgewell/resolve-uri": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.0.8.tgz",
-      "integrity": "sha512-YK5G9LaddzGbcucK4c8h5tWFmMPBvRZ/uyWmN1/SbBdIvqGUdWGkJ5BAaccgs6XbzVLsqbPJrBSFwKv3kT9i7w==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.0.tgz",
+      "integrity": "sha512-F2msla3tad+Mfht5cJq7LSXcdudKTWCVYUgw6pLFOOHSTtZlj6SWNYAp+AhuqLmWdBO2X5hPrLcu8cVP8fy28w==",
       "dev": true
     },
     "@jridgewell/sourcemap-codec": {
@@ -880,9 +880,9 @@
       }
     },
     "c8": {
-      "version": "7.11.3",
-      "resolved": "https://registry.npmjs.org/c8/-/c8-7.11.3.tgz",
-      "integrity": "sha512-6YBmsaNmqRm9OS3ZbIiL2EZgi1+Xc4O24jL3vMYGE6idixYuGdy76rIfIdltSKDj9DpLNrcXSonUTR1miBD0wA==",
+      "version": "7.12.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-7.12.0.tgz",
+      "integrity": "sha512-CtgQrHOkyxr5koX1wEUmN/5cfDa2ckbHRA4Gy5LAL0zaCFtVWJS5++n+w4/sr2GWGerBxgTjpKeDclk/Qk6W/A==",
       "dev": true,
       "requires": {
         "@bcoe/v8-coverage": "^0.2.3",
@@ -1073,9 +1073,9 @@
       }
     },
     "ig-stoppable": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ig-stoppable/-/ig-stoppable-2.0.0.tgz",
-      "integrity": "sha512-UfIQZI6kAPUbroocVRrgtH7cTulg8kfUoHo7EMvhiEjtzWvHDlzTotCRSeDmMtT1WyKn/1o7o3dwc9D5DNcvNA=="
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/ig-stoppable/-/ig-stoppable-2.0.1.tgz",
+      "integrity": "sha512-vos7eFNHryIg6yNzrWTV1QP1Sja5JkMU3nL2Y/YvSgU74l7w1Rx6yfVKoEHwNOex4MCkLsq6wMa91Ac6IWOtIA=="
     },
     "ig-test": {
       "version": "1.5.4",
@@ -1149,9 +1149,9 @@
       }
     },
     "istanbul-reports": {
-      "version": "3.1.4",
-      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.4.tgz",
-      "integrity": "sha512-r1/DshN4KSE7xWEknZLLLLDn5CJybV3nw01VTkp6D5jzLuELlcbudfj/eSQFvrKsJuTVCGnePO7ho82Nw9zzfw==",
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.1.5.tgz",
+      "integrity": "sha512-nUsEMa9pBt/NOHqbcbeJEgqIlY/K7rVWUX6Lql2orY5e9roQOthbR3vtY4zzf2orPELg80fnxxk9zUyPlgwD1w==",
       "dev": true,
       "requires": {
         "html-escaper": "^2.0.0",
diff --git a/package.json b/package.json
index 26cdae0..2618078 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-types",
-  "version": "6.15.7",
+  "version": "6.16.0",
   "description": "Generic JavaScript types and type extensions...",
   "main": "main.js",
   "scripts": {