vvscode
diff --git a/‎topics/flow.md‎
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@@ -93,3 +93,7 @@ try {
  alert( e);
 }
 ```
+
+---
+Create `promisify` function which takes node-style (error-first) function and converts it into promise-based function. 
+Instead of calling callback with error, data it return promise which resolves/rejectes. It worth to check if function save context for original function (`this`)
Original file line number	Diff line number	Diff line change
`@@ -93,3 +93,7 @@ try {`
`93`	`93`	`alert( e);`
`94`	`94`	`}`
`95`	`95`	```
	`96`	`+`
	`97`	`+---`
	`98`	+Create `promisify` function which takes node-style (error-first) function and converts it into promise-based function.
	`99`	+Instead of calling callback with error, data it return promise which resolves/rejectes. It worth to check if function save context for original function (`this`)