codewars练习（javascript）-2021/2/25

codewars-js练习

2021/2/25

github 地址

my github地址，上面有做的习题记录，不断更新…

【1】<8kyu>【Total pressure calculation】

$$P_{total}=\frac{(\frac{m_1}{M_1}+\frac{m_2}{M_2})RT}{V}$$

solution

<script type="text/javascript">
        solution= (molarMass1, molarMass2, givenMass1, givenMass2, volume, temp) => {
            console.log(molarMass1, molarMass2, givenMass1, givenMass2, volume, temp);
            var R = 0.082;
            var sum = ((givenMass1/molarMass1)+(givenMass2/molarMass2))
            var temperature = temp+273.15
            var P = (sum*R*temperature)/volume
            return P
        };
    
        // 验证
        console.log(solution(44, 30, 3, 2, 5, 50));// 0.7146511212121212
        console.log(solution(60, 20, 10, 30, 10, 100))//5.099716666666667
	</script>

【2】<6kyu>【Convert string to camel case】

Complete the method/function so that it converts dash/underscore delimited words into camel casing. The first word within the output should be capitalized only if the original word was capitalized (known as Upper Camel Case, also often referred to as Pascal case).

example：

"the-stealth-warrior" gets converted to "theStealthWarrior"
"The_Stealth_Warrior" gets converted to "TheStealthWarrior"

solution

<script type="text/javascript">
        function toCamelCase(str){
            // console.log(str)
            // 利用正则表达式分隔字符串
            if(str=='')return ''
            var arr = str.split(/[-_]/)
            // console.log(arr)
            for(var i=1;i<arr.length;i++){
                arr[i] = arr[i][0].toUpperCase()+arr[i].substring(1,arr[i].length)
            }
            return arr.join('')

        }
    
        // 验证
        console.log(toCamelCase(''));// ''
        console.log(toCamelCase("the_stealth_warrior"));//"theStealthWarrior"
        console.log(toCamelCase("The-Stealth-Warrior"));//TheStealthWarrior"
	</script>

以上为自己思路供大家参考，可能有更优的思路。