Curate parser topic (#4150)

* Curate parser topic

* Mark 'logging' and 'parser' as completed

topics-todo.md

@@ -52,7 +52,7 @@ Information included in this repository will appear on each topic's respective p
 - [x] [iot](https://github.com/topics/iot/)
 - [x] [javafx](https://github.com/topics/javafx/)
 - [x] [keras](https://github.com/topics/keras/)
-- [ ] [logging](https://github.com/topics/logging/)
+- [x] [logging](https://github.com/topics/logging/)
 - [x] [lua](https://github.com/topics/lua/)
 - [x] [maven](https://github.com/topics/maven/)
 - [x] [microservice](https://github.com/topics/microservice/)
@@ -63,7 +63,7 @@ Information included in this repository will appear on each topic's respective p
 - [x] [objective-c](https://github.com/topics/objective-c/)
 - [x] [opencv](https://github.com/topics/opencv/)
 - [x] [opengl](https://github.com/topics/opengl/)
-- [ ] [parser](https://github.com/topics/parser/)
+- [x] [parser](https://github.com/topics/parser/)
 - [x] [personal-website](https://github.com/topics/personal-website/)
 - [x] [portfolio](https://github.com/topics/portfolio/)
 - [ ] [project](https://github.com/topics/project/)
@@ -91,4 +91,4 @@ Information included in this repository will appear on each topic's respective p
 - [x] [website](https://github.com/topics/website/)
 - [x] [winforms](https://github.com/topics/winforms/)
 - [x] [wpf](https://github.com/topics/wpf/)
-- [x] [xml](https://github.com/topics/xml/)
+- [x] [xml](https://github.com/topics/xml/)

topics/parser/index.md

@@ -0,0 +1,11 @@
+---
+topic: parser
+display_name: Parser
+short_description: turns its input (often text in form of a file) into a more advantageous representation to perform a specific task.
+---
+A parser turns its input (often text in form of a file) into a more advantageous representation (usually a certain data structure in memory) to perform a specific task.  
+
+Common examples include:
+* parsers for markup languages (e.g. HTML/Markdown etc)
+* parsers for data-serialization formats (e.g. JSON/XML/YAML etc)
+* parsers used as part of/in conjunction with a compiler (in this case, the parser consumes the tokenized input emitted by the Lexer and ultimately feeds the resulting parse tree/concrete syntax tree into the compiler)