How do I search through JSON?

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  • Hello;

    I'm building a game where screen information are stored in a JSON.

    First screen loaded is "screen_1" on which links can lead to other screens. When a link is clicked, next screen name is stored in a variable nextScreen and I'd like to perform a search in the JSON to check which level is this next screen and display according information

    Here is the JSON 

    {
 "screens": [
 {
 "id": "screen_1",
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 1 flashing section egestas."
 }
 ]
 },
 {
 "id": "screen_2",
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 2 flashing section egestas."
 }
 ]
 },
 {
 "id": "screen_3",
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 3 flashing section egestas."
 }
 ]
 }
 ]
}

    So far I managed to load the JSON correctily using AJAX. I can display info using the correct path but I've a hard time building the loop "for each" that search the next screen name through the JSON and display related information.

    I tried to add to the foreach loop something like :

    {...}JSON - For each entry in "screens"

    System - JSON.Get ("screens."&LoopIndex&".id") = nextScreen

    but it doesn't work...

    Tagged:

  • loopindex expression doesn't work in "For each entry" loop. You can use "Compare value" condition with a relative path. 

    JSON For each entry in "screens"
JSON Compare value ".id" = nextScreen

    Since each screen has a unique ID, it may be easier to change JSON structure to this: 

    {
 "screens": {
 "screen_1": {
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 1 flashing section egestas."
 }
 ]
 },
 "screen_2": {
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 2 flashing section egestas."
 }
 ]
 },
 "screen_3": {
 "elements": [
 {
 "type": "text",
 "id": "instructions",
 "content": "Screen 3 flashing section egestas."
 }
 ]
 }
 }
}

    This will allow to access any screen directly, without looping through the entire JSON. For example:

    JSON.Get("screens." & nextscreen & ".elements.0.content")

    .

    Also, if each screen has only a single element - get rid of the arrays of elements, this will make it even simpler: 

    {
 "screens": {
 "screen_1": {
 "element_type": "text",
 "element_id": "instructions",
 "element_content": "Screen 1 flashing section egestas."
 },
 "screen_2": {
 "element_type": "text",
 "element_id": "instructions",
 "element_content": "Screen 2 flashing section egestas."
 },
 "screen_3": {
 "element_type": "text",
 "element_id": "instructions",
 "element_content": "Screen 3 flashing section egestas."
 }
 }
}

    Usage:

    JSON.Get("screens." & nextscreen & ".element_content")

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  • That's perfectly clear ! Thank you

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