Listing 13 shows how to check the actual feed.
清单13显示了如何检查实际的feed。
One technique involves using HTTP request headers to check if the Google data API feed has changed.
一项技术涉及使用HTTP请求报头检查Google数据API摘要是否已更改。
Testing is another kind of runtime analysis: You feed in data or events and check to see that you got the right behavior from the program.
测试是另一种运行时分析:您通过数据或事件检验是否获得来自系统的正确行为。
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