Commit 1b6a3cb

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Coding Money

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the matrix

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	`1`	`+// --- Directions`
	`2`	`+// Write a function that accepts an integer N`
	`3`	`+// and returns a NxN spiral matrix.`
	`4`	`+// --- Examples`
	`5`	`+// matrix(2)`
	`6`	`+// [[1, 2],`
	`7`	`+// [4, 3]]`
	`8`	`+// matrix(3)`
	`9`	`+// [[1, 2, 3],`
	`10`	`+// [8, 9, 4],`
	`11`	`+// [7, 6, 5]]`
	`12`	`+// matrix(4)`
	`13`	`+// [[1, 2, 3, 4],`
	`14`	`+// [12, 13, 14, 5],`
	`15`	`+// [11, 16, 15, 6],`
	`16`	`+// [10, 9, 8, 7]]`
	`17`	`+`
	`18`	`+function matrix(n) {`
	`19`	`+ const result = []`
	`20`	`+ let counter=1, startRow=0, endRow=n-1, startCol=0, endCol=n-1`
	`21`	`+ for(let i=0; i<n; i++){`
	`22`	`+ result.push([])`
	`23`	`+ }`
	`24`	`+`
	`25`	`+ while(startRow<=endRow && startCol<=endCol){`
	`26`	`+ //Top`
	`27`	`+ for(let i=startCol; i<=endCol; i++){`
	`28`	`+ result[startRow][i] = counter`
	`29`	`+ counter++`
	`30`	`+ }`
	`31`	`+ startRow++`
	`32`	`+`
	`33`	`+ //Right`
	`34`	`+ for(let i=startRow; i<=endRow; i++){`
	`35`	`+ result[i][endCol] = counter`
	`36`	`+ counter++`
	`37`	`+ }`
	`38`	`+ endCol--`
	`39`	`+`
	`40`	`+ //Bottom`
	`41`	`+ for(let i=endCol; i>=startCol; i--){`
	`42`	`+ result[endRow][i] = counter`
	`43`	`+ counter++`
	`44`	`+ }`
	`45`	`+ endRow--`
	`46`	`+ //Left`
	`47`	`+ for(let i=endRow; i>=startRow; i--){`
	`48`	`+ result[i][startCol] = counter`
	`49`	`+ counter++`
	`50`	`+ }`
	`51`	`+ startCol++`
	`52`	`+ }`
	`53`	`+`
	`54`	`+ return result`
	`55`	`+}`
	`56`	`+`
	`57`	`+console.log(matrix(6));`

Lines changed: 20 additions & 0 deletions

Original file line number	Diff line number	Diff line change
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	`1`	`+// --- Directions`
	`2`	`+// Write a function that accepts an integer N`
	`3`	`+// and returns a NxN spiral matrix.`
	`4`	`+// --- Examples`
	`5`	`+// matrix(2)`
	`6`	`+// [[1, 2],`
	`7`	`+// [4, 3]]`
	`8`	`+// matrix(3)`
	`9`	`+// [[1, 2, 3],`
	`10`	`+// [8, 9, 4],`
	`11`	`+// [7, 6, 5]]`
	`12`	`+// matrix(4)`
	`13`	`+// [[1, 2, 3, 4],`
	`14`	`+// [12, 13, 14, 5],`
	`15`	`+// [11, 16, 15, 6],`
	`16`	`+// [10, 9, 8, 7]]`
	`17`	`+`
	`18`	`+function matrix(n) {}`
	`19`	`+`
	`20`	`+console.log(matrix(4));`

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