codewars练习（javascript）-2021/1/30
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文章目录
codewars-js练习
2021/1/30
github 地址
【1】<8kyu>【Check the exam】
The first input array is the key to the correct answers to an exam, like [“a”, “a”, “b”, “d”]. The second one contains a student’s submitted answers.
The two arrays are not empty and are the same length. Return the score for this array of answers, giving +4 for each correct answer, -1 for each incorrect answer, and +0 for each blank answer, represented as an empty string (in C the space character is used).
If the score < 0, return 0.
example：
checkExam(["a", "a", "b", "b"], ["a", "c", "b", "d"]) → 6
checkExam(["a", "a", "c", "b"], ["a", "a", "b", ""]) → 7
checkExam(["a", "a", "b", "c"], ["a", "a", "b", "c"]) → 16
checkExam(["b", "c", "b", "a"], ["", "a", "a", "c"]) → 0
solution
<script type="text/javascript">
function checkExam(array1, array2) {
// console.log(array1,array2);
var correct = 0;
var error = 0;
var other = 0;
for(var i=0;i<array1.length;i++){
if(array1[i] == array2[i]){
correct ++;
}else if(array2[i] == ''){
other = 0;
}else{
error ++;
}
}
// console.log(correct,error);
var result = correct * 4 + error * (-1) + other;
if(result <0){
return 0;
}
return result;
}
验证
console.log(checkExam(["a", "a", "b", "b"], ["a", "c", "b", "d"]));// 6
console.log(checkExam(["a", "a", "c", "b"], ["a", "a", "b", ""]));//7
console.log(checkExam(["b", "c", "b", "a"], ["", "a", "a", "c"]));//0
</script>
【2】<7kyu>【Love vs friendship】
If a = 1, b = 2, c = 3 ... z = 26
Then l + o + v + e = 54
and f + r + i + e + n + d + s + h + i + p = 108
So friendship is twice stronger than love
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