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How to use if statement inside JSON Here is the code: .......................................................................................
var config =
[
{
"name" : "SiteTitle",
"bgcolor" : "",
"color" : "",
"position" : "TL",
"text" : "step1",
"time" : 5000
},
{
"name" : "Jawal",
"bgcolor" : "",
"color" : "",
"text" : "step2",
"position" : "BL",
"time" : 5000
},
{
"name" : "Password",
"bgcolor" : "",
"color" : "",
"text" : "step3",
"position" : "TL",
"time" : 5000
}
],
//define if steps should change automatically
autoplay = false,
//timeout for the step
showtime,
//current step of the tour
step = 0,
//total number of steps
total_steps = config.length;
This is the required result something like this:
var config =
[
if(page==true) {
{
"name" : "SiteTitle",
"bgcolor" : "",
"color" : "",
"position" : "TL",
"text" : "step1",
"time" : 5000
},
{
"name" : "Jawal",
"bgcolor" : "",
"color" : "",
"text" : "step2",
"position" : "BL",
"time" : 5000
}
} else {
{
"name" : "Password",
"bgcolor" : "",
"color" : "",
"text" : "step3",
"position" : "TL",
"time" : 5000
}
}
],
//define if steps should change automatically
autoplay = false,
//timeout for the step
showtime,
//current step of the tour
step = 0,
//total number of steps
total_steps = config.length;
Actually this way is wrong and makes a JavaScript syntax error.
310
Use the JSON_EXISTS condition to test whether a specified JSON value exists in JSON data. This condition returns TRUE if the JSON value exists and FALSE if the JSON value does not exist. Use this clause to specify the JSON data to be evaluated. For expr , specify an expression that evaluates to a text literal.
var config = [ if(page==true) { { "name" : "SiteTitle", "bgcolor" : "", "color" : "", "position" : "TL", "text" : "step1", "time" : 5000 }, { "name" : "Jawal", "bgcolor" : "", "color" : "", "text" : "step2", "position" : "BL", "time" : 5000 } } else { { "name" : "Password", "bgcolor" : "", "color" : "", "text" : "step3 ...
JsonObject::containsKey() returns a bool that tells whether the key was found or not: true if the key is present in the object. false if the key is absent of the object.
Yes, you can. There are tons of ways to do it. var tmpFunc = new Function(codeToRun); tmpFunc(); Whether it was JSON at any stage should be irrelevant.
Validating the JSON Schema Draft-07, JSON now supports the if...then...else keywords for conditional data representation.
Here is a quick example:
{
"type": "integer",
"minimum": 1,
"maximum": 1000,
"if": { "minimum": 100 },
"then": { "multipleOf": 100 },
"else": {
"if": { "minimum": 10 },
"then": { "multipleOf": 10 }
}
}
Using the OP's example in the context, it can be written like this:
{
"if": {
"page": true
},
"then": [
{
"name": "SiteTitle",
"bgcolor": "",
"color": "",
"position": "TL",
"text": "step1",
"time": 5000
},
{
"name": "Jawal",
"bgcolor": "",
"color": "",
"text": "step2",
"position": "BL",
"time": 5000
}
],
"else": [
{
"name": "Password",
"bgcolor": "",
"color": "",
"text": "step3",
"position": "TL",
"time": 5000
}
]
}
That's regular JavaScript, not JSON. Move the if statement outside:
if (page) {
var config = [
{
"name" : "SiteTitle",
"bgcolor" : "",
"color" : "",
"position" : "TL",
"text" : "step1",
"time" : 5000
}, {
"name" : "Jawal",
"bgcolor" : "",
"color" : "",
"text" : "step2",
"position" : "BL",
"time" : 5000
}
];
} else {
var config = [
{
"name" : "Password",
"bgcolor" : "",
"color" : "",
"text" : "step3",
"position" : "TL",
"time" : 5000
}
];
}
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