Updated FAQ (markdown)

FAQ.md

@@ -23,7 +23,6 @@
   - [Why do I have a segmentation fault?](#why-do-i-have-a-segmentation-fault)
   - [Can I parse data from a stream?](#can-i-parse-data-from-a-stream)
   - [Can I parse a JSON input that is too big to fit in memory?](#can-i-parse-a-json-input-that-is-too-big-to-fit-in-memory)
-  - [Should I call `parseArray\(\)` or `parseObject\(\)`?](#should-i-call-parsearray-or-parseobject)
   - [Why parsing fails?](#why-parsing-fails)
   - [The first parsing succeeds, why do the next ones fail?](#the-first-parsing-succeeds-why-do-the-next-ones-fail)
   - [Parsing succeeds but I can't read the values!](#parsing-succeeds-but-i-cant-read-the-values)
@@ -546,7 +545,68 @@ See issues [#60](https://github.com/bblanchon/ArduinoJson/issues/60), [#119](htt
 
 
 
-### Should I call `parseArray()` or `parseObject()`?
+### Why parsing fails?
+
+The parsing functions, `parseArray()` and `parseObject()`, may fail for 5 reasons:
+
+1. [The input is not a valid JSON](#case-1-the-input-is-not-a-valid-json)
+2. [The `StaticJsonBuffer` is too small](#case-2-the-staticjsonbuffer-is-too-small)
+3. [The `StaticJsonBuffer` is too big (stack overflow)](#case-3-the-staticjsonbuffer-is-too-big)
+4. [The `DynamicJsonBuffer` fails to allocate memory](#case-4-the-dynamicjsonbuffer-fails-to-allocate-memory)
+5. [You called `parseObject()` instead of `parseArray()`](#case-5-you-called-parseobject-instead-of-parsearray)
+
+#### Case 1: The input is not a valid JSON
+
+This seems obvious, but a lot of issues are caused by from an invalid input.
+In particular, if you're writing an HTTP client, you need to skip the HTTP headers and send only the JSON payload to ArduinoJson.
+
+See:
+
+* Issues [#108](https://github.com/bblanchon/ArduinoJson/issues/108), [#167](https://github.com/bblanchon/ArduinoJson/issues/167), [#218](https://github.com/bblanchon/ArduinoJson/issues/218) and [#237](https://github.com/bblanchon/ArduinoJson/issues/237).
+
+#### Case 2: The `StaticJsonBuffer` is too small
+
+You can solve the problem by increasing the size of the `StaticJsonBuffer` or by switching to a `DynamicJsonBuffer`.
+
+See:
+
+* Issues [#53](https://github.com/bblanchon/ArduinoJson/issues/53), [#89](https://github.com/bblanchon/ArduinoJson/issues/89), [#202](https://github.com/bblanchon/ArduinoJson/issues/202), [#280](https://github.com/bblanchon/ArduinoJson/issues/280), [#293](https://github.com/bblanchon/ArduinoJson/issues/293) and [#296](https://github.com/bblanchon/ArduinoJson/issues/296)
+
+#### Case 3: The `StaticJsonBuffer` is too big
+
+You can try to switch to a `DynamicJsonBuffer`. Indeed, most platforms have a fixed size of the stack (usually 4KB on the ESP8266) the rest of the RAM being reserved to the heap. That's why moving the `JsonBuffer` from the stack to the heap can solve this kind of problem.
+
+See:
+
+* Issues [#167](https://github.com/bblanchon/ArduinoJson/issues/167) and [#234](https://github.com/bblanchon/ArduinoJson/issues/234).
+
+#### Case 4: The `DynamicJsonBuffer` fails to allocate memory
+
+You may have a memory leak, it up to you to find it. You can try to switch to `StaticJsonBuffer` which is more efficient.
+
+Also, if the input string is constant, the `JsonBuffer` will have to make a copy of it.
+
+```c++
+// case 1: char array => no duplication => good
+char[] json = "{\"hello\":\"world\"}";
+jsonBuffer.parseObject(json);
+
+// case 2: const char* => duplication => bad
+const char* json = "{\"hello\":\"world\"}";
+jsonBuffer.parseObject(json);
+
+// case 3: String => duplication => bad
+String json = "{\"hello\":\"world\"}";
+jsonBuffer.parseObject(json);
+```
+
+To avoid any duplication, make sure you use an input of type `char*` or `char[]`
+
+See:
+
+* Issues [#154](https://github.com/bblanchon/ArduinoJson/issues/154), [#177](https://github.com/bblanchon/ArduinoJson/issues/177), [#179](https://github.com/bblanchon/ArduinoJson/issues/179) and [#223](https://github.com/bblanchon/ArduinoJson/issues/223) and [#320](https://github.com/bblanchon/ArduinoJson/issues/320).
+
+#### Case 5: You called `parseObject()` instead of `parseArray()`
 
 This is a very common question as people are often confused when the JSON input contains mixed arrays and objects.
 
@@ -571,49 +631,9 @@ then you must call `parseArray()` because the root is an array.
 
 Finally, if you cannot know in advance the type of the root, please open an issue. Don't worry this can be implemented very easily, it's just that nobody asked for it.
 
+See:
 
-
+* Issue [#391](https://github.com/bblanchon/ArduinoJson/issues/391)
-### Why parsing fails?
-
-The parsing functions, `parseArray()` and `parseObject()`, may fail for 4 reasons:
-
-1. The input is not a valid JSON
-2. The `StaticJsonBuffer` is too small
-3. The `StaticJsonBuffer` is too big (stack overflow)
-4. The `DynamicJsonBuffer` fails to allocate memory
-
-Case 1. seems obvious, but a lot of issues are caused by from an invalid input.
-In particular, if you're writing an HTTP client, you need to skip the HTTP headers and send only the JSON payload to ArduinoJson.
-See issues [#108](https://github.com/bblanchon/ArduinoJson/issues/108), [#167](https://github.com/bblanchon/ArduinoJson/issues/167), [#218](https://github.com/bblanchon/ArduinoJson/issues/218) and [#237](https://github.com/bblanchon/ArduinoJson/issues/237)
-
-If you're in case 2., you can solve the problem by increasing the size of the `StaticJsonBuffer` or by switching to a `DynamicJsonBuffer`.
-See issues [#53](https://github.com/bblanchon/ArduinoJson/issues/53), [#89](https://github.com/bblanchon/ArduinoJson/issues/89), [#202](https://github.com/bblanchon/ArduinoJson/issues/202), [#280](https://github.com/bblanchon/ArduinoJson/issues/280), [#293](https://github.com/bblanchon/ArduinoJson/issues/293) and [#296](https://github.com/bblanchon/ArduinoJson/issues/296)
-
-If you're in case 3., you can try to switch to a `DynamicJsonBuffer`. Indeed, most platforms have a fixed size of the stack (usually 4KB on the ESP8266) the rest of the RAM being reserved to the heap. That's why moving the `JsonBuffer` from the stack to the heap can solve this kind of problem.
-See issues [#167](https://github.com/bblanchon/ArduinoJson/issues/167) and [#234](https://github.com/bblanchon/ArduinoJson/issues/234).
-
-If you're in case 4., you may have a memory leak, it up to you to find it. You can try to switch to `StaticJsonBuffer` which is more efficient.
-
-Also, if the input string is constant, the `JsonBuffer` will have to make a copy of it.
-
-```c++
-// case 1: char array => no duplication => good
-char[] json = "{\"hello\":\"world\"}";
-jsonBuffer.parseObject(json);
-
-// case 2: const char* => duplication => bad
-const char* json = "{\"hello\":\"world\"}";
-jsonBuffer.parseObject(json);
-
-// case 3: String => duplication => bad
-String json = "{\"hello\":\"world\"}";
-jsonBuffer.parseObject(json);
-```
-
-To avoid any duplication, make sure you use an input of type `char*` or `char[]`
-
-See issues [#154](https://github.com/bblanchon/ArduinoJson/issues/154), [#177](https://github.com/bblanchon/ArduinoJson/issues/177), [#179](https://github.com/bblanchon/ArduinoJson/issues/179) and [#223](https://github.com/bblanchon/ArduinoJson/issues/223) and [#320](https://github.com/bblanchon/ArduinoJson/issues/320).
-
 
 
 ### The first parsing succeeds, why do the next ones fail?