Question

除了（1）项目外，如何输出数组作为场景？我们假设数组的内容是：["!report","Jay","This","is","the","reason"]; 我尝试在（1）之后输出项目：(args.slice(1));但是输出现在是：＆＃34;这是，原因＆＃34;，我怎么能把它输出为普通的风格？

Answer 1

如果您不想使用内置方法，可以附加每个单词在从索引1开始的数组中（第二项）。

// List of words
var words = ["!report","Jay","This","is","the","reason"];

// Empty string
var sentence = "";

// Loop through array starting at index 1 (second item)
for (let i = 1; i < words.length; i++) {

  // Keep appending the words to sentence string
  sentence = sentence + words[i] + " ";
}

// Print the sentence as a whole
console.log(sentence);

或使用内置功能：

// Array of strings
var array = ["!report","Jay","This","is","the","reason"];

// Cut off the first element, words is still an array though
var words = array.slice(1)

// Join each element into a string with spaces in between
var sentence = words.join(" ")

// Print as full sentence
console.log(sentence)

输出：

"Jay This is the reason"

Answer 2

.slice() 会返回一个新数组，因此当您整体访问它时，您经常会看到以逗号分隔的数组值列表。

但是，.slice()以及 .join() 可以解决问题。 .join()允许您加入＆＃34;所有数组值都作为单个字符串。如果将参数传递给.join()，则该参数将用作分隔符。

然后，您可以将句点（.）连接到字符串的末尾。

＆＃13;

console.log(["!report","Jay","This","is","the","reason"].slice(1).join(" ") + ".");

＆＃13;

Answer 3

您可以从第二个元素切片并加入数组。

{{1}}

Answer 4

您想要的输出不是很清楚（您只想删除第一项还是第二项）。但是方法是一样的：

如果您符合es6标准，则可以使用destructuring assignment syntax

const arr = [a,b,...c] = ["!report","Jay","This","is","the","reason"];
let sentence = c.join(" ");
// or
let sentence2 = c.toString().replace(/,/g," ");

console.log (sentence," - ",sentence2);

或简单地用正则表达式和正确的模式替换

const arr =  ["!report","Jay","This","is","the","reason"];

let sentence = arr.toString().replace(/^[A-z! ]+?,[A-z ]+?,/,"").replace(/,/g," ");

// or

let sentence2 = arr.toString().replace(/^[A-z! ]+?,/,"").replace(/,/g," ");

console.log (sentence," - ",sentence2);

Answer 5

在这里，检查代码说明的小提琴注释。

＆＃13;

var a = ["!report","Jay","This","is","the","reason"];

//removes first element from array and implodes array with spaces
var sentence = a.slice(1).join(" ");

console.log(sentence);

＆＃13;

将数组显示为除第一项外的其他项

5 个答案: