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- function ajDiamond(input) {
- input = input.toUpperCase();
- var standardInput = ["A","B","C","D","E","F","G","H","I","J"];
- var spacer = " ";
- var index = standardInput.indexOf(input);
- var halfArr = [];
- var tempArr = [];
- var sessionArr = function(index) {
- var arr = [];
- for (var i = 0; i < index; i ++) {
- arr.push(standardInput[i]);
- }
- for (var j = index; j >= 0; j --) {
- arr.push(standardInput[j]);
- }
- return arr;
- };
- if (index === -1) {
- console.log("Invalid input '"+input+"'. Make sure you use a letter in the range A to J.");
- } else {
- console.log("Input: "+input);
- console.log("Output: ");
- console.log(" ");
- for (var i = 0; i < sessionArr(index).length; i ++) {
- if (i < (sessionArr(index).length/2)) {
- for (var j = 0; j < i; j ++) {
- tempArr.push(spacer);
- }
- } else {
- for (var x = 2; x <= i; x ++) {
- halfArr.push(halfArr[i-x]);
- }
- }
- tempArr.push(sessionArr(index)[i]);
- for (var y = i; y < index; y ++) {
- tempArr.push(spacer);
- }
- halfArr.push(tempArr.join(""));
- tempArr.splice(0, tempArr.length);
- }
- for (var z = 0; z < sessionArr(index).length; z++) {
- var originalArr = halfArr[z];
- var reverseArr = halfArr[z].slice(1,halfArr[z].length).split("").reverse().join("");
- var fullArr = reverseArr.concat(originalArr);
- console.log(fullArr);
- }
- console.log(" "); // for aesthetic purposes
- }
- }
- // Test cases
- ajDiamond("a");
- ajDiamond("b");
- ajDiamond("c");
- ajDiamond("d");
- ajDiamond("e");
- ajDiamond("f");
- ajDiamond("g");
- ajDiamond("h");
- ajDiamond("i");
- ajDiamond("j");
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