Open source software is a wonderful resource because it allows developers to reuse existing code to fill specific needs rather than write new software from scratch.
开源软件是极好的资源，因为它让开发人员复用现有的代码来满足具体的需求，而不是从零开始写新的软件。
2
In your code, execute the object's Fill method (perhaps in a FormLoad event).
在您的代码中执行对象的Fill方法(可能在FormLoad事件中)。
3
To create it, open a new file at $WASP_ROOT/app/lib/validator/PriceRangeCustomValidator.class.php, and fill it with the code in Listing 17.