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检查目录是否存在，不存在则使用 mkdirSync() 创建目录
- 2020.05.18
const fs = require('fs');
// creates the directory 'test', if it doesn't exist
const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined);
createDirIfNotExists('test');
const fs = require('fs');
// creates the directory 'test', if it doesn't exist
const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined);
createDirIfNotExists('test');