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pass random shift length as second argument #4

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pass random shift length as second argument #4

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8 changes: 6 additions & 2 deletions exercises/caeser_cypher/exercise.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,10 @@ function getRandomIndex(arr) {
return Math.floor(Math.random() * arr.length)
}

function getRandomShiftLength() {
return Math.floor(Math.random() * (25 - -25 + 1)) + -25
}

// checks that the submission file actually exists
exercise = filecheck(exercise)

Expand All @@ -22,8 +26,8 @@ exercise.addSetup(function(mode, callback){
"Never eat glue.",
"Dogs are the best."
]
var arg = strings[getRandomIndex(strings)]
this.submissionArgs = this.solutionArgs = arg
var args = [strings[getRandomIndex(strings)], getRandomShiftLength()]
this.submissionArgs = this.solutionArgs = args
process.nextTick(callback)
})

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23 changes: 12 additions & 11 deletions exercises/caeser_cypher/solution/solution.js
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Original file line number Diff line number Diff line change
@@ -1,28 +1,29 @@
var arg = process.argv[2];
var text = process.argv[2]
var shift = parseInt(process.argv[3])

function caesarCypher(text, shift) {
if (shift < 0)
return caeserShift(str, shift + 26);
return caesarCypher(text, shift + 26)

var output = '';
var output = ''

for (var i = 0; i < text.length; i++) {
var char = text[i];
var char = text[i]

if (char.match(/[a-z]/i)) {
var code = text.charCodeAt(i);
var code = text.charCodeAt(i)

if ((code >= 65) && (code <= 90)) // Uppercase
char = String.fromCharCode(((code - 65 + shift) % 26) + 65);
char = String.fromCharCode(((code - 65 + shift) % 26) + 65)

else if ((code >= 97) && (code <= 122)) // Lowercase
char = String.fromCharCode(((code - 97 + shift) % 26) + 97);
char = String.fromCharCode(((code - 97 + shift) % 26) + 97)
}

output += char;
output += char
}
return output;
return output
}

var result = caesarCypher(arg, 4);
console.log(result);
var result = caesarCypher(text, shift)
console.log(result)