This question already has answers here:
JavaScript object: access variable property by name as string [duplicate]
(3 answers)
Closed 8 years ago.
I need to update a value in my JSON.
My JSON result looks like this:
results = {"ROWCOUNT":50,"COLUMNS":["PERSONID","NAME"],"DATA":{"PERSONID":["42","43","44"], "NAME":["JOE","TOM","JANE"]}
resultData = results.DATA
In the below code I am looping over the result set and attempting to update a value at a position. I believe it is failing because I am not using dynamic variables correctly.
var columnName = "NAME";
for(i=0; i < results.ROWCOUNT; i++ ){
resultData.columnName[i] = "foo" // failing here due to "columnName" being dynamic.
}
Figured it out.. You have to use array syntax
resultData[columName][i]
Related
This question already has answers here:
Accessing an object property with a dynamically-computed name
(19 answers)
Closed 1 year ago.
I'm trying to add a variable into a path like this:
response.response.body.result.company.data.t${variable}.month_col_val[i]
I know it's wrong, yet I'm not being able to find if it's actually posible to do it and how to do it.
My json file contains objects named t0, t1, t2... and so on inside data, so i'm trying to get an specific one by adding the variable value along the T
Variable is define outside the fuction and pass as a parameter.
for (let o = 0; o < 12; o++) {
cy.get($el).find('.month-data-cols').eq(o).invoke('text').then($text => {
let monthGross = $text
let monthGrossReq = response.response.body.result.company.data.t${variable}.month_col_val[o]
monthGross = monthGross.toString().replace(/,/g, '').trim();
expect(monthGross).to.include(monthGrossReq);
})
};
Try using square-bracket notation instead of dot-notation at that property
const data = response.response.body.result.company.data
const monthGrossReq = data[`t${variable}`].month_col_val[o]
This question already has answers here:
Is there any way to use a numeric type as an object key?
(11 answers)
Closed 4 years ago.
i have a JSON object (sent from php) and I want to convert the IDs to a numeric key using JS. So currently it looks something like that:
let foo = {"66":"test","65":"footest"};
And now I want it to look like this:
let foo = {66:"test",65:"footest"};
Object keys do not need to be numerical to be accessed - as noted in the comments - they are strings regardless.- Below, I am console logging the "66" property using the brackets notation - foo[66]
let foo = {"66":"test","65":"footest"};
console.log(foo[66]); // gives "test"
// if you want to assign values numerically - ie using the index of a loop - then you could do
for(i = 63; i<65; i++) {
foo[i] = "test" + i;
}
console.log(foo); // gives {"63": "test63", "64": "test64","65": "footest","66": "test"}
This question already has answers here:
How to check if object property exists with a variable holding the property name?
(11 answers)
How to use a variable for a key in a JavaScript object literal?
(16 answers)
Closed 5 years ago.
I'm attempting to run a list of strings through an object. When I do it individually it works, but when I pass it through as a string it doesn't work. How would I fix this?
// this doesn't work
var a = "IntegrationItem1";
var data = faq.a;
// but this works
var data = faq.IntegrationItem1;
What's causing the first example to not work? Is the variable data seeing it as faq."IntegrationItem1" instead of faq.IntegrationItem1?
You can access properties of the object using it's names:
var a = "IntegrationItem1";
var data = faq[a];
what you need is faq["IntegrationItem1"] => faq[a]
This question already has answers here:
Add a property to a JavaScript object using a variable as the name? [duplicate]
(14 answers)
Closed 5 years ago.
I have this snippet of code:
var arrLiteData = [];
for(ii=0;ii<10;ii++)
{
arrLiteData.push({ii:{"field1":100,"field2":ii}});
}
...but instead of ii taking the increasing numeric value of ii, the array just holds the actual variable name, like this:
[{"ii":{"field1":100,"field2":0}},{"ii":{"field1":100,"field2":1}}...etc, etc...
What am I doing wrong?
Many thanks.
Quotes are optional for javascript object keys, so
{ii:{"field1":100,"field2":ii}} is the same as
{"ii":{"field1":100,"field2":ii}} or even
{ii:{field1:100,field2:ii}}. They are just need if you have non alphanumeric characters.
To solve this you could either use a computed key if you're transpiling your code or targeting recent navigators:
{[ii]:{"field1":100,"field2":ii}}
Or build the object in two steps:
var arrLiteData = [];
for(ii=0;ii<10;ii++)
{
var obj = {};
obj[ii] = {"field1":100,"field2":ii};
arrLiteData.push(obj);
}
This question already has answers here:
How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
(2 answers)
Closed 8 years ago.
I have this code, but I want the belongsto var to be retrieved as the key using the var value and not the var name:
var belongsto = panel.attr('data-belongsto');
var panelid = panel.attr('id');
tabValue.push({belongsto:panelid}); console.log(tabValue);
this returns [{'belongsto':'12345'}]
As you can see the the script takes belongsto as the key name but I need it to take the content of the variable.
Any help is appreciated, thanks-
Create the object first
var obj = {};
obj[belongsto] = panelid;
tabValue.push(obj);