Update docs.md

docs.md

@@ -2,13 +2,13 @@
 
 `fx` can work in two modes: cli and interactive. To start interactive mode pipe into `fx` any JSON:
 
-```
+```bash
 $ curl ... | fx
 ```
 
 Or you can pass file argument as first parameter:
 
-```
+```bash
 $ fx my.json
 ```
 
@@ -17,7 +17,7 @@ If any argument was passed, `fx` will apply it and prints to stdout.
 ## Anonymous function
 
 Use an anonymous function as reducer which gets JSON and processes it:
-```
+```bash
 $ echo '{"foo": [{"bar": "value"}]}' | fx 'x => x.foo[0].bar'
 value
 ```
@@ -26,7 +26,7 @@ value
 
 If you don't pass anonymous function `param => ...`, code will be automatically transformed into anonymous function.
 And you can get access to JSON by `this` keyword:
-```
+```bash
 $ echo '{"foo": [{"bar": "value"}]}' | fx 'this.foo[0].bar'
 value
 ```
@@ -34,13 +34,13 @@ value
 ## Dot
 
 It is possible to omit `this` keyword:
-```
+```bash
 $ echo '{"foo": [{"bar": "value"}]}' | fx .foo[0].bar
 value
 ```
 
 If single dot is passed, JSON will be processed without modification:
-```
+```bash
 $ echo '{"foo": "bar"}' | fx .
 {
   "foo": "bar"
@@ -50,7 +50,7 @@ $ echo '{"foo": "bar"}' | fx .
 ## Chain
 
 You can pass any number of anonymous functions for reducing JSON:
-```
+```bash
 $ echo '{"foo": [{"bar": "value"}]}' | fx 'x => x.foo' 'this[0]' 'this.bar'
 value
 ```
@@ -59,12 +59,12 @@ value
 
 If passed code contains `yield` keyword, [generator expression](https://github.com/sebmarkbage/ecmascript-generator-expression)
 will be used:
-```
+```bash
 $ curl ... | fx 'for (let user of this) if (user.login.startsWith("a")) yield user'
 ```
 
 Access to JSON through `this` keyword:
-```
+```bash
 $ echo '["a", "b"]' | fx 'yield* this'
 [
   "a",
@@ -72,7 +72,7 @@ $ echo '["a", "b"]' | fx 'yield* this'
 ]
 ```
 
-```
+```bash
 $ echo '["a", "b"]' | fx 'yield* this; yield "c";'
 [
   "a",
@@ -85,7 +85,7 @@ $ echo '["a", "b"]' | fx 'yield* this; yield "c";'
 
 You can update existing JSON using spread operator:
 
-```
+```bash
 $ echo '{"count": 0}' | fx '{...this, count: 1}'
 {
   "count": 1
@@ -95,7 +95,7 @@ $ echo '{"count": 0}' | fx '{...this, count: 1}'
 ## Using packages
 
 Use any npm package by installing it globally:
-```
+```bash
 $ npm install -g lodash
 $ cat package.json | fx 'require("lodash").keys(this.dependencies)'
 ```
@@ -112,7 +112,7 @@ Object.assign(global, require('lodash/fp'))
 
 And now you will be able to call all lodash methods. For example, see who's been committing to react recently:
 
-```
+```bash
 curl 'https://api.github.com/repos/facebook/react/commits?per_page=100' \
 | fx 'groupBy("commit.author.name")' 'mapValues(size)' toPairs 'sortBy(1)' reverse 'take(10)' fromPairs
 ```
@@ -126,12 +126,12 @@ curl 'https://api.github.com/repos/facebook/react/commits?per_page=100' \
 
 If you need something different then JSON (for example arguments for xargs) do not return anything from reducer.
 `undefined` value is printed into stderr by default.
-```
+```bash
 echo '[]' | fx 'void 0'
 undefined
 ```
 
-```
+```bash
 echo '[1,2,3]' | fx 'this.forEach(x => console.log(x))' 2>/dev/null | xargs echo
 1 2 3
 ```
@@ -139,7 +139,7 @@ echo '[1,2,3]' | fx 'this.forEach(x => console.log(x))' 2>/dev/null | xargs echo
 ## Other examples
 
 Convert object to array:
-```
+```bash
 $ cat package.json | fx 'Object.keys(this.dependencies)'
 [
   "@medv/prettyjson"
@@ -148,7 +148,7 @@ $ cat package.json | fx 'Object.keys(this.dependencies)'
 
 By the way, fx has shortcut for `Object.keys(this)`. Previous example can be rewritten as:
 
-```
+```bash
 $ cat package.json | fx this.dependencies ?
 ```