查找当前日期所在周的周一的日期

JavaScript:

Js代码 

1. var now = new Date();  
2. var monday = now;  
3. monday.setDate(now.getDate() - now.getDay() + 1);  
4. monday_date = monday.getFullYear() + "-" + monday.getMonth() + "-" + monday.getDate();  
5.   
6. now = new Date();  
7. var sunday = new Date();  
8. sunday.setDate(now.getDate() - now.getDay() + 7);  
9. monday_date = sunday.getFullYear() + "-" + sunday.getMonth() + "-" + sunday.getDate();  

 Rails:

Ruby代码 

1. monday_date = Date.today.beginning_of_week.strftime('%d/%m/%Y')