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I have an array like this:
var animals=["cat","dog","snake","rhino"];
But sometimes I have to delete this array(remove it from the dom).
I have tried animals.remove; and $(animals).remove() and animals.remove() but none of them did the trick.Any ideas?
var animals=["cat","dog","snake","rhino"];
then to clear it do:
animals=[];
or
animals.length=0;
or
while(animals.length > 0) {
animals.pop();
}
Just assign the animals array to a value undefined and the array data will be dereferenced and garbage collected.
Donot try to call delete operator that is explicit removal.
animals = undefined
OR
animals = void 0
Thanks
Just Clear The Array
Using This 2 Methods
animals.length =0
animals=[];
Related
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I have explore a few webs and watch some videos but I couldn't understand how array.forEach() works
This is the script that I found regarding that
let meals = ["rice", "meat", "salad"];
meals.forEach(capitalize);
meals.forEach(print);
function capitalize(element, index, array){
array[index] = element[0].toUpperCase() + element.substring(1);
}
function print(element){
console.log(element);
}
Can someone explain to me about how array[index] = element(0).toUpperCase() + element.substring(1); and meal.forEach(); works?
forEach() is an array function from JavaScript, that is used to iterate over items in a given array.
element[0] will return first character of each array element.
toUpperCase() is function use to convertthe string into upper case.
element.substring(1) this will return a string, except for the first character.
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I am trying to declare an integer Array but don't know how to do this. Is it possible to declare a int array in Vue.
In your script , just add this below :
data(){
return {
your_array : [1,2,3,4,5,6]
}
}
your_array is just an example, the variable name can be any anything.
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Convert
var a = [['12ae11ee12-1bhb222','2019-10-10T19:46.19.632z','a123']]
to
var a= ['12ae11ee12-1bhb222','2019-10-10T19:46.19.632z','a123']
I dont want two square brackets in front and end.
I want output
a[2] = 'a123'
The best way to do is just assigning the first value to the array:
var a = [['12ae11ee12-1bhb222','2019-10-10T19:46.19.632z','a123']];
a = a[0];
console.log(a);
But the right way of dealing it should be making sure that the endpoint or whatever that outputs should output correctly.
You can use Array.prototype.flat().
console.log([['12ae11ee12-1bhb222','2019-10-10T19:46.19.632z','a123']].flat());
This solution works if it's extremely nested too:
console.log([
['12ae11ee12-1bhb222'],
['2019-10-10T19:46.19.632z', 'a123']
].flat());
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I need for an Plugin an Object structure like this:
{
"Beer":145.53,
"Apple (red)":7.33,
"Apple (green)":0.03
}
Don't know how to write it that this shine.
I got the all values already so how to set it up like this?
Use this notation to make objects with those properties:
var obj = {};
obj["Beer"] = 145;
obj["Apple (red)"] = 7.5;
....
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Hi this is a simple question. I was wondering is there any different when you declare something like this. Thanks
selectedData[key](val)
and
selectedData[key] = val
This line selectedData[key](val) is not a declaration, it's calling the function that is stored under the key key in the object selectedData and it's passing the parameter val to that function.
The other line selectedData[key] = val is assigning the value val to the key key in the object selectedData.
In the first case, you're calling whatever is in selectedData[key] as a function with val as an argument while in the second one you're assigning it.