javascript - JavaScript 正则表达式的复杂字符串操作

Question

我在 JavaScript/Node JS 程序中使用以下规则生成一些有意义的名称:

Input: "tenancy_account__accountPublicId__workspace__workspacePublicId__remove-user__userPublicId"

Expected output: "TenancyAccountAccountPublicIdWorkspaceWorkspacePublicIdRemove-userUserPublicId"

规则:

将任何带有零个或多个下划线的字符替换为非下划线大写
示例:x | __*x => X

如果存在删除最后一个_

这是迄今为止尝试过的，寻找更好的替代品，如果有的话:

const convertBetterString = (input) => {
    const finalString = [];
    if (input && input.includes('_')) {
        const inputStringSeparation = input.split('_');
        if (inputStringSeparation.length > 1) {
            if (inputStringSeparation[inputStringSeparation.length - 1] === '') {
                inputStringSeparation.splice(inputStringSeparation.length - 1, 1);
            }
            inputStringSeparation.forEach((val, index) => {
                if (val === '' && inputStringSeparation[index + 1]) {
                    const actualString = inputStringSeparation[index + 1];
                    const formattedString = actualString.charAt(0).toUpperCase() + actualString.slice(1);
                    finalString.push(formattedString);
                }
            });
            return finalString.length > 0 ? finalString.join('') : inputStringSeparation.join('');
        } else {
            return input.charAt(0).toUpperCase() + input.slice(1);
        }
    } else {
        return input;
    }
}

Answer 1

拆分和切片

const capitalise = str => str.slice(0,1).toUpperCase() + str.slice(1); // you can add more tests

const str = "tenancy_account__accountPublicId__workspace__workspacePublicId__remove-user__userPublicId"
const newStr = str.split(/_+/)
  .map(word => capitalise(word))
  .join("")
console.log(newStr)

带有可选链接的正则表达式

const str = "tenancy_account__accountPublicId__workspace__workspacePublicId__remove-user__userPublicId_"

const newStr = str.replace(/(?:_+|^)(\w)?/g, (_,letter) => letter?.toUpperCase() ?? "")

console.log(newStr)

解释(?:_+|^)不捕获下划线或开始(\w)?后跟要捕获的 0 或 1 个字母(_,letter) => letter?.toUpperCase() ?? "")忽略匹配项，如果找到则大写字母，也忽略尾随下划线