Sunny-117 / js-challenges

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检验字符串首尾是否含有数字

Sunny-117 opened this issue · comments

let reg = /^\d|\d$/g;//或
let reg2 = /^\d[\s\S]*\d$/g;//都
function hasNumberAtStartAndEnd(str) {
  // 检查字符串开头是否包含数字
  if (/\d/.test(str.charAt(0))) {
    return true;
  }
  
  // 检查字符串结尾是否包含数字
  if (/\d/.test(str.charAt(str.length - 1))) {
    return true;
  }
  
  // 如果字符串既不以数字开头也不以数字结尾,则返回false
  return false;
}
/^((\d.*)|(.*\d))$/