Queue = function Queue(...initialValues) {
const list = [];
if (initialValues) {
// todo is this going to rerun ever
list.push(...initialValues);
}
this.size = function() {
return list.length;
}
this.peek = function peek() { // returns optional value
return list.length ? list[0] : null;
}
this.push = function push(value) {
if (Array.isArray(value)) list.push(...value);
else list.push(value);
return value; // this.peek();
}
this.pop = function pop() { // returns optional value
if (list.length > 0)
return list.pop();
else
return null;
}
this.find = function find(value) { // returns optional value (Maybe observable.com need Typescript...)
const index = list.indexOf(value);
if (index === -1)
return null;
else
return index;
}
this.print = function print(logger=console.log) {
const output = `Queue() <[${list.toString()}]>`;
return output;
}
}
{ // Test 1
let q = new Queue();
q.push(1);
assert(q.pop() === 1);
assert(q.size() == 0);
}
x = new Queue(1, 2, 3);
x.print();
x.find(3);
x.peek();
x.push(2)
x.push([10,11])
x.print()
assert = function(b) {
if (!b) {
throw Error("Assertion error.")
}
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
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