Question

我遇到过一个关于使用HTML中的表单计算句子的问题，但我想先找出函数，看看它是否有效。这是我的功能，我无法让它在jsfiddle（https://jsfiddle.net/jdloomis/fxt81ynu/2/）中运行：

var numSentences = 0;

function calSentences(longString) {
  var length = longString.length;
  var sentence = '';

for (var i = 0; i < length; i++) {
  sentence += longString[i];

  if (longString[i] == '.') {
    numSentences++;
    sentence = '';
    }
  }
}

console.log(calSentences("This is a sentence. My second sentence."));

我已经能够找出大部分功能以及他们在我的书中做了什么，除了这个和没有使用.split的单词计数，如果我无法弄明白，我会在另一篇文章中发布那个。

Answer 1

你如此关闭你的尝试！您忘记做的只是返回 return numSentences的句子数量

＆＃13;

var numSentences = 0;

function calSentences(longString) {
  var length = longString.length;
  var sentence = '';

  for (var i = 0; i < length; i++) {
    sentence += longString[i];
    if (longString[i] == '.') {
      numSentences++;
      sentence = '';
    }
  }

  return numSentences;
}

console.log(calSentences("This is a sentence. My second sentence."));

＆＃13;

希望这有帮助！：）

Answer 2

您的代码是正确的，但您没有从函数中返回任何内容。

此外，请将var numSentences保留在您的函数本地，以便每次运行函数时它都会重置为0。否则，每次运行该函数时都会添加到先前的计算中。

function calSentences(longString) {
  var numSentences = 0;
  var length = longString.length;
  var sentence = '';

for (var i = 0; i < length; i++) {
  sentence += longString[i];

  if (longString[i] == '.') {
    numSentences++;
    sentence = '';
    }
  }
  return numSentences;
}

console.log(calSentences("This is a sentence. My second sentence."));

使用Javascript

2 个答案: