下面是将二维数组或列数组转换为正确转义的CSV字符串的实现。函数不检查有效的字符串/数字输入或列计数(确保数组从一开始就是有效的)。单元格可以包含逗号和引号!

这里有一个解码CSV字符串的脚本。

这是我编码CSV字符串的脚本:

// Example
var csv = new csvWriter();
csv.del = '\t';
csv.enc = "'";

var nullVar;
var testStr = "The comma (,) pipe (|) single quote (') double quote (\") and tab (\t) are commonly used to tabulate data in plain-text formats.";
var testArr = [
    false,
    0,
    nullVar,
    // undefinedVar,
    '',
    {key:'value'},
];

console.log(csv.escapeCol(testStr));
console.log(csv.arrayToRow(testArr));
console.log(csv.arrayToCSV([testArr, testArr, testArr]));

/**
 * Class for creating csv strings
 * Handles multiple data types
 * Objects are cast to Strings
 **/

function csvWriter(del, enc) {
    this.del = del || ','; // CSV Delimiter
    this.enc = enc || '"'; // CSV Enclosure

    // Convert Object to CSV column
    this.escapeCol = function (col) {
        if(isNaN(col)) {
            // is not boolean or numeric
            if (!col) {
                // is null or undefined
                col = '';
            } else {
                // is string or object
                col = String(col);
                if (col.length > 0) {
                    // use regex to test for del, enc, \r or \n
                    // if(new RegExp( '[' + this.del + this.enc + '\r\n]' ).test(col)) {

                    // escape inline enclosure
                    col = col.split( this.enc ).join( this.enc + this.enc );

                    // wrap with enclosure
                    col = this.enc + col + this.enc;
                }
            }
        }
        return col;
    };

    // Convert an Array of columns into an escaped CSV row
    this.arrayToRow = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.escapeCol(arr2[i]);
        }
        return arr2.join(this.del);
    };

    // Convert a two-dimensional Array into an escaped multi-row CSV 
    this.arrayToCSV = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.arrayToRow(arr2[i]);
        }
        return arr2.join("\r\n");
    };
}

使用内置的Array。toString方法

var arr = ['one', 'two', 'three'];
arr.toString();  // 'one,two,three'

Array.toString()上的MDN

下面是将二维数组或列数组转换为正确转义的CSV字符串的实现。函数不检查有效的字符串/数字输入或列计数(确保数组从一开始就是有效的)。单元格可以包含逗号和引号!

这里有一个解码CSV字符串的脚本。

这是我编码CSV字符串的脚本:

// Example
var csv = new csvWriter();
csv.del = '\t';
csv.enc = "'";

var nullVar;
var testStr = "The comma (,) pipe (|) single quote (') double quote (\") and tab (\t) are commonly used to tabulate data in plain-text formats.";
var testArr = [
    false,
    0,
    nullVar,
    // undefinedVar,
    '',
    {key:'value'},
];

console.log(csv.escapeCol(testStr));
console.log(csv.arrayToRow(testArr));
console.log(csv.arrayToCSV([testArr, testArr, testArr]));

/**
 * Class for creating csv strings
 * Handles multiple data types
 * Objects are cast to Strings
 **/

function csvWriter(del, enc) {
    this.del = del || ','; // CSV Delimiter
    this.enc = enc || '"'; // CSV Enclosure

    // Convert Object to CSV column
    this.escapeCol = function (col) {
        if(isNaN(col)) {
            // is not boolean or numeric
            if (!col) {
                // is null or undefined
                col = '';
            } else {
                // is string or object
                col = String(col);
                if (col.length > 0) {
                    // use regex to test for del, enc, \r or \n
                    // if(new RegExp( '[' + this.del + this.enc + '\r\n]' ).test(col)) {

                    // escape inline enclosure
                    col = col.split( this.enc ).join( this.enc + this.enc );

                    // wrap with enclosure
                    col = this.enc + col + this.enc;
                }
            }
        }
        return col;
    };

    // Convert an Array of columns into an escaped CSV row
    this.arrayToRow = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.escapeCol(arr2[i]);
        }
        return arr2.join(this.del);
    };

    // Convert a two-dimensional Array into an escaped multi-row CSV 
    this.arrayToCSV = function (arr) {
        var arr2 = arr.slice(0);

        var i, ii = arr2.length;
        for(i = 0; i < ii; i++) {
            arr2[i] = this.arrayToRow(arr2[i]);
        }
        return arr2.join("\r\n");
    };
}

const arr = [1, 2, 3];
console.log(`${arr}`)

该解决方案还删除了诸如“”这样的值:

const result = ['', null, 'foo', '  ', undefined, 'bar'].filter(el => {
  return Boolean(el) && el.trim() !== '';
}).join(', ');

console.log(result); // => foo, bar

取初始代码:

var arr = new Array(3);
arr[0] = "Zero";
arr[1] = "One";
arr[2] = "Two";

使用连接函数的初始答案是理想的。需要考虑的一件事是字符串的最终用途。

用于某些最终文本显示:

arr.join(",")
=> "Zero,One,Two"

用于在URL中以(有点)RESTful方式传递多个值:

arr.join("|")
=> "Zero|One|Two"

var url = 'http://www.yoursitehere.com/do/something/to/' + arr.join("|");
=> "http://www.yoursitehere.com/do/something/to/Zero|One|Two"

当然，这完全取决于最终的用途。只要记住数据源和使用方法，一切都将是正确的。