This question already has answers here:
Accessing nested JavaScript objects and arrays by string path
(44 answers)
Closed 7 months ago.
How to call a nested function with only a string? eg:
function oot(wha) {
function inn(wha)
{
First.innerHTML+="Inner ["+wha+"]";
}
oot.inn = inn;
Second.innerHTML+="Outer ["+wha+"]";
}
oot("1");
oot.inn("2"); //works okay
window["oot"]("3"); //works okay
window["oot.inn"]("4"); //<The problem, doesn't work.
window["oot"]["inn"]("4"); //Works, thanks.
Edited to make the code more readable, and show a solution.
IF there is no way to make this work with a single string i can probably make do, but i will leave the question unanswered for a few hours to see if there is another solution.
You can reference nested Objects like this:
window["oot"]["inn"]("4");
or
window.oot.inn("4")
Related
This question already has answers here:
How to get value at a specific index of array In JavaScript?
(8 answers)
Closed 2 years ago.
so I am currently learning javascript on Codecademy. And a weird kind of thing got introduced that I don't quite get.
if you look at the code. you see at the end in console that after logging animals it is a [i] like why is that there? I get that is has something to do with the for loop. But I don't quite understand like why or what that it does. I don't know if question is clear enough but if you just try to explain why it is there and what it does there. that would be greatly appreciated:)
const animals = ['Grizzly Bear', 'Sloth', 'Sea Lion'];
for (let i = 0; i < animals.length; i++){
console.log(animals[i]);
}
the bracket notation is used to specify the index of the array you are looping through. You can always read more about javascript arrays on w3schools
This question already has answers here:
Why does changing an Array in JavaScript affect copies of the array?
(12 answers)
Closed 5 years ago.
I am stuck with a part of my google script code where one of array elements changed unexpectedly. It looks like a bug to me, but I'd like to hear from here if it's really is or just my coding error that I overlooked. Of course, I'm hoping for a solution as well in any case.
Here is that part of the code.
if (chkIn) {arr[1] = importData[i][1]+'2';
} else {
Logger.log((i)+' '+importData[i][1]);
Logger.log((i+1)+' '+importData[i+1][1]);
Logger.log((i+2)+' '+importData[i+2][1]);
Logger.log(arr[1]);
arr[1] = importData[i][1]+'1';
Logger.log('---------------------------------------------------');
Logger.log((i)+' '+importData[i][1]);
Logger.log((i+1)+' '+importData[i+1][1]);
Logger.log((i+2)+' '+importData[i+2][1]);
Logger.log(arr[1]);
};
(The if statement doesn't seem relevant here, but I included it just in case.)
Here is the output.
2573 2017122103
2574 20171221041
2575 20171221042
20171221042
---------------------------------------------------
2573 2017122103
2574 20171221041
2575 20171221031
20171221031
I really have no idea how importData[i+2][1] changed its value to arr[1] (the number after 2575).
Thank you in advance.
Probably this is because in your case:
arr === importData[i+2]
So when you change arr[1] you also have changed importData[i+2][1].
This question already has answers here:
From an array of objects, extract value of a property as array
(24 answers)
Closed 7 years ago.
Hello stackoverflow community, I need help with ajax $.get function. When I recieve array from getlist.php and i alert ir like this alert(data_list); everything works correctly. But when I try to alert like this alert(data_list.id) it doesn't work. Here is how my array looks like in console:
[{"id":"2","name":"Something","type":"horizontal","clicks":"0","start_date":"01/20/2016","end_date"
:"02/19/2016","status":"1","target":"http://","image_url":"http://","pre_exp_email":"0"},{"id"
:"1","name":"None","type":"horizontal","clicks":"2","start_date":"01/20/2016","end_date":"05/19/2016"
,"status":"1","target":"http://wps.us.lt","image_url":"http://....../wp-content/uploads/2016
/01/250by250ad.jpg","pre_exp_email":"0","group_id":["1"],"slots":{"1":"1"}}]
And here is myfunction which calls get function.
function get_list() {
jQuery.get("/wp-content/plugins/wp125/functions/getlist.php", { grouptype:jQuery('#grouptype').val() }, function(data_list){
var str;
alert(data_list.name);
});
}
If data is only a object like
var k={"id":123;"name":"abc"}
you can access id using k.id
but when it is object of Array like
var k=[{"id":123,"name":"abc"},{"id":13,"name":"ab"}];
in that case you have iterate over array something like this
for(i=0;i<k.length;i++)
{console.log(k[i].id)}
This question already has answers here:
Why Array.indexOf doesn't find identical looking objects
(8 answers)
Closed 7 years ago.
I have an angularJS/Typescript application where I am trying to check if an object is already in a current list of objects
if (this.selectedFormatData.indexOf(item) === -1) {
//doesn't exist so add
this.selectedFormatData.push(item);
} else {
this.selectedFormatData.splice(this.selectedFormatData.indexOf(item), 1);
}
I have used this code before and it worked but isn't in this instance. Console output suggests it should work?
Any ideas?
Update: yeah correct looks like a duplicate sorry. I had a previous bit of code where i thought it worked because it was returning 0 instead of -1. Not sure why it would return 0 though
As the comments state, indexOf() is not meant to compare objects. This has been answered before here: Why Array.indexOf doesn't find identical looking objects.
This question already has answers here:
Determine whether an array contains a value [duplicate]
(18 answers)
Closed 9 years ago.
Is there a built-in function in javascript to do this or this is only the option to go? Please look at the code below:
var arr=[1,3,4,'+','-', or whatever]
function value_check(user_click){
var operators=['+','-','/','*','.']
for (var i=0;i<operators.length;i++){
if (arr[arr.length-1]==operators[i]){var value1='operator found';}
if (user_click==operators[i]){
var value2= value1;alert("consecutive operators"); break;
}
}
}
I think this code achieves what I intend to do but is there a simple and shorter way of doing this. In words, I want to achieve something like this:
if (arr[arr.length-1] && user_click BOTH ARE IN operators array)
alert("consecutive operators)
Yes, there are some options:
JavaScript indexOf()
jQuery.inArray()
arrayName.indexOf() is what you are looking for.