Recently I came across a javascript array
var countries = ["India","USA","China","Canada","China"];
My goal is to eliminate "China" only from the 2nd position while keeping the rest intact.
var countries = ["India","USA","Canada","China"];I am seeking a method similar to java's linkedlist.remove(index)
Although I have gone through this discussion, I'm unsure how to handle duplicate elements within the array. How do I remove a particular element from an array in JavaScript?
Consider using the splice() method:
planets.splice(1,1);
The first parameter in splice() specifies the index position while the second parameter is the number of elements to remove.
To find the index of a specific item, you can use indexOf(), returning -1 if the item is not found:
planets.indexOf("Mars");
Therefore, an implementation could be:
var i = planets.indexOf("Mars");
if(i !== -1) {
planets.splice(i, 1);
}
To deal with duplicate values in an array, a combination of array.indexOf and array.splice can be used.
var countries = ["India","USA","China","Canada","China"];
var first_china = countries.indexOf("China");
if(first_china > -1){
countries.splice(first_china , 1);
}
A similar solution is also provided in the link you shared (). The indexOf method will only remove the first occurrence of a value in the array even if there are duplicates present.
If you want to manipulate arrays in JavaScript, one option is using the JavaScript Array splice() Method.
var countries = ["India", "USA", "China", "Canada", "China"];
document.getElementById("demo").innerHTML = countries;
function myFunction() {
countries.splice(2, 1);
document.getElementById("demo").innerHTML = countries;
}<button onclick="myFunction()">SPLICE!</button>
<p id="demo"></p>var countries = ["India","USA","China","Canada","China"];
// specify the index you wish to eliminate (2)
var newCountries = countries.filter(function(item, idx) {if(idx != 2) return item;});
console.log(newCountries);
SEE EXAMPLE: http://jsfiddle.net/kf8epwnh/
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