循環陣列 object

Question

我正在嘗試遍歷這個數組

var questions = [
    {
        ask: 'is Javascript the best language?',
        correct: 0,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },
    {
        ask: 'is Javascript the most popular language?',
        correct: 1,
        answer : [
            {text: 'yes'},
            {text: 'No'}
        ]
    },

]

關鍵是我想用這個循環得到每一個問題，並在控制台日志中得到這些問題

var currentQuestion = questions.length;

for( var i = 0; i < currentQuestion; i++){
   console.log(questions[i]);
}

但console.log 說：未捕獲的類型錯誤：無法讀取未定義的屬性“長度”

Answer 1

看起來可變問題未包含在同一個文件中。

Answer 2

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects上有關 js 對象的更多信息。

 var questions = [ { ask: 'is Javascript the best language?', correct: 0, answer: [ {text: 'yes'}, {text: 'No'} ] }, { ask: 'is Javascript the most popular language?', correct: 1, answer: [ {text: 'yes'}, {text: 'No'} ] }, ]; var currentQuestion = questions.length; for( var i = 0; i < currentQuestion; i++){ console.log(questions[i].ask); } // es6 way questions.map(q => { // console.log(q.ask); // will get all the questions })

Answer 3

用於...：

 var questions = [ { ask: 'is Javascript the best language?', correct: 0, answer: [ {text: 'yes'}, {text: 'No'} ] }, { ask: 'is Javascript the most popular language?', correct: 1, answer: [ {text: 'yes'}, {text: 'No'} ] }, ] for(let values of questions){ console.log(values); }