build an array
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class MyArray {
constructor() {
this.length = 0;
this.data = {};
}
get(index) {
return this.data[index];
}
push(item) {
this.data[this.length] = item;
this.length++;
return this.length;
}
pop() {
const lastItem = this.data[this.length-1];
delete this.data[this.length-1];
this.length--;
return lastItem;
}
delete(index) {
const item = this.data[index];
this.shiftItems(index);
return item;
}
shiftItems(index) {
for (let i = index; i < this.length-1; i++) {
this.data[i] = this.data[i+1];
}
this.pop();
}
}
const newArray = new MyArray();
newArray.push('hi');
newArray.push('you');
newArray.push('!');
newArray.delete(0);
newArray.push('are');
newArray.push('nice');
newArray.delete(1);
console.log(newArray);
JavaScript
INFO