javascript中包含特定字母的数组的输出元素

Question

我是 javascript 新手，我正在努力在我的函数上使用正确的语法来从包含字母“i”的数组中提取元素。

let teachers = ["Arrington", "Kincart", "Alberts", "Pickett"]

let rooms = [
  ["Andy", "Rodolfo", "Lynn", "Talia"],
  ["Al", "Ross", "Jorge", "Dante"],
  ["Nick", "Kim", "Jasmine", "Dorothy"],
  ["Adam", "Grayson", "Aliyah", "Alexa"]
]

let iInName = (teacher) => {
  let nameWithI = []
  teachers.forEach((withI) => {
    if(teacher.includes('i') {
    nameWithI.push(withI)
  }
})
return nameWithI
}

iInName()

非常感谢任何见解。这是我第一次在这里发帖；如果我遗漏了任何信息或忽略了任何礼仪，我很乐意解决！

Answer 1

How to use the forEach method

withI 被传递给您定义的这个函数 (callback)。 teachers 是名称数组，每个名称都会调用withI。

if(teacher.includes('i') 应该是 if(withI.includes('i'))，因为 withI 是老师的名字。

您可能还想查看Array.prototype.filter

function iInName(teachers) {
  let nameWithI = []
  teachers.forEach((withI) => { // A function or commonly referred to as a callback
    if(withI.includes('i') { // Changed from teachers (of type array)
      nameWithI.push(withI)  // To withI (type string)
    }
  })
  /*
   return teachers.filter((name) => {
      return name.includes('i') // Keeps value if true
    })
  */
  // return teachers.filter(name => name.includes('i'))
  return nameWithI
}
iInName(['joe', 'marie']) // Any array

您只需要三个解决方案之一，一个用/* 和*/ 注释掉，另一个用// 注释掉。最相似的是未注释（使用）。