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86d333ee94
* chore: Switch to Node 20 + Vitest * chore: migrate to vitest mock functions * chore: code style (switch to prettier) * test: re-enable long-running test Seems the switch to Node 20 and Vitest has vastly improved the code's and / or the test's runtime! see #1193 * chore: code style * chore: fix failing tests * Updated Documentation in README.md * Update contribution guidelines to state usage of Prettier * fix: set prettier printWidth back to 80 * chore: apply updated code style automatically * fix: set prettier line endings to lf again * chore: apply updated code style automatically --------- Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com> Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>
58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
/* Stack!!
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* A stack is exactly what it sounds like. An element gets added to the top of
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* the stack and only the element on the top may be removed. This is an example
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* of an array implementation of a Stack. So an element can only be added/removed
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* from the end of the array.
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*/
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// Functions: push, pop, peek, view, length
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// Creates a stack constructor
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const Stack = (function () {
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function Stack() {
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// The top of the Stack
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this.top = 0
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// The array representation of the stack
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this.stack = []
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}
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// Adds a value onto the end of the stack
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Stack.prototype.push = function (value) {
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this.stack[this.top] = value
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this.top++
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}
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// Removes and returns the value at the end of the stack
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Stack.prototype.pop = function () {
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if (this.top === 0) {
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return 'Stack is Empty'
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}
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this.top--
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const result = this.stack[this.top]
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this.stack = this.stack.splice(0, this.top)
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return result
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}
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// Returns the size of the stack
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Stack.prototype.size = function () {
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return this.top
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}
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// Returns the value at the end of the stack
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Stack.prototype.peek = function () {
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return this.stack[this.top - 1]
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}
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// To see all the elements in the stack
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Stack.prototype.view = function (output = (value) => console.log(value)) {
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for (let i = 0; i < this.top; i++) {
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output(this.stack[i])
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}
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}
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return Stack
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})()
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export { Stack }
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