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Commit 0974a56

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Adding pyramid
1 parent 8869a10 commit 0974a56

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‎pyramid/directions.md‎

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# --- Directions
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Write a function that accepts a positive number N.
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The function should console log a pyramid shape
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with N levels using the # character. Make sure the
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pyramid has spaces on both the left *and* right hand sides
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#--- Examples
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* pyramid(1) should return:
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'#'
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* pyramid(2) should return:
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' # '
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'###'
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* pyramid(3) should return:
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' # '
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' ### '
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'#####'
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# --- Solutions
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// Solution No 1
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function pyramid(n) {
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const midpoint = Math.floor((2*n-1)/2);
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for(let row = 0; row < n; row++) {
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let level = '';
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for(let column = 0; column < 2*n-1; column++) {
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if(midpoint - row <= column && midpoint + row >= column){
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level += '#';
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} else {
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level += ' ';
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}
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}
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console.log(level);
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}
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}
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// Solution No 2
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function pyramid(n, row = 0, level = '') {
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if(n === row){
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return;
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}
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if(level.length === 2*n-1){
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console.log(level);
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return pyramid(n, row+1);
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}
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const midpoint = Math.floor((2*n-1)/2);
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let add;
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if(midpoint - row <= level.length && midpoint + row >= level.length){
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add = '#';
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} else {
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add = ' ';
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}
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pyramid(n, row, level+add);
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}

‎pyramid/pyramid.js‎

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// --- Directions
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// Write a function that accepts a positive number N.
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// The function should console log a pyramid shape
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// with N levels using the # character. Make sure the
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// pyramid has spaces on both the left *and* right hand sides
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// --- Examples
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// pyramid(1)
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// '#'
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// pyramid(2)
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// ' # '
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// '###'
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// pyramid(3)
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// ' # '
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// ' ### '
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// '#####'
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// Solution No 1
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function pyramid(n) {
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const midpoint = Math.floor((2*n-1)/2);
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for(let row = 0; row < n; row++) {
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let level = '';
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for(let column = 0; column < 2*n-1; column++) {
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if(midpoint - row <= column && midpoint + row >= column){
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level += '#';
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} else {
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level += ' ';
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}
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}
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console.log(level);
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}
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}
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// Solution No 2
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function pyramid(n, row = 0, level = '') {
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if(n === row){
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return;
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}
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if(level.length === 2*n-1){
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console.log(level);
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return pyramid(n, row+1);
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}
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const midpoint = Math.floor((2*n-1)/2);
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let add;
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if(midpoint - row <= level.length && midpoint + row >= level.length){
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add = '#';
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} else {
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add = ' ';
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}
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pyramid(n, row, level+add);
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}

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