Commit 95e3b85

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adding stack data structure

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Lines changed: 37 additions & 0 deletions

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	`1`	`+# --- Directions`
	`2`	`+`
	`3`	`+Create a stack data structure. The stack`
	`4`	`+should be a class with methods 'push', 'pop', and`
	`5`	`+'peek'. Adding an element to the stack should`
	`6`	`+store it until it is removed.`
	`7`	`+`
	`8`	`+# --- Examples`
	`9`	`+`
	`10`	`+ const s = new Stack();`
	`11`	`+ s.push(1);`
	`12`	`+ s.push(2);`
	`13`	`+ s.pop(); should returns 2`
	`14`	`+ s.pop(); should returns 1`
	`15`	`+`
	`16`	`+`
	`17`	`+# --- Solutions`
	`18`	`+`
	`19`	`+// Solution`
	`20`	`+`
	`21`	`+ class Stack {`
	`22`	`+ constructor() {`
	`23`	`+ this.data = [];`
	`24`	`+ }`
	`25`	`+`
	`26`	`+ push(record) {`
	`27`	`+ this.data.push(record);`
	`28`	`+ }`
	`29`	`+`
	`30`	`+ pop() {`
	`31`	`+ return this.data.pop();`
	`32`	`+ }`
	`33`	`+`
	`34`	`+ peek() {`
	`35`	`+ return this.data[this.data.length -1];`
	`36`	`+ }`
	`37`	`+ }`

Lines changed: 34 additions & 0 deletions

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	`1`	`+// --- Directions`
	`2`	`+`
	`3`	`+// Create a stack data structure. The stack`
	`4`	`+// should be a class with methods 'push', 'pop', and`
	`5`	`+// 'peek'. Adding an element to the stack should`
	`6`	`+// store it until it is removed.`
	`7`	`+`
	`8`	`+// --- Examples`
	`9`	`+`
	`10`	`+// const s = new Stack();`
	`11`	`+// s.push(1);`
	`12`	`+// s.push(2);`
	`13`	`+// s.pop(); should returns 2`
	`14`	`+// s.pop(); should returns 1`
	`15`	`+`
	`16`	`+// Solution`
	`17`	`+`
	`18`	`+class Stack {`
	`19`	`+ constructor() {`
	`20`	`+ this.data = [];`
	`21`	`+ }`
	`22`	`+`
	`23`	`+ push(record) {`
	`24`	`+ this.data.push(record);`
	`25`	`+ }`
	`26`	`+`
	`27`	`+ pop() {`
	`28`	`+ return this.data.pop();`
	`29`	`+ }`
	`30`	`+`
	`31`	`+ peek() {`
	`32`	`+ return this.data[this.data.length -1];`
	`33`	`+ }`
	`34`	`+}`

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