在缓存清单文件HTML5的FALLBACK部分使用通配符(Using Wildcard in FALLBACK section of Cache manifest file HTML5)
如何创建脱机启用的Web应用程序,以便在用户访问hxxp:// mywebsite /且脱机时显示hxxp:// mywebsite / offline /。 [我的网站中有大约100个不同的动态页面,所以我无法在缓存清单文件中对它们全部进行硬编码]
How to create an offline enabled web-application such that when user visits hxxp://mywebsite/ and is offline than hxxp://mywebsite/offline/ is displayed. [There are about 100 different dynamic pages in my website, so I cannot afford to hardcode all of them in the cache manifest file]
原文:https://stackoverflow.com/questions/3727774
最满意答案
为什么你有三个功能来做同样的事情? 这完全破坏了功能的目的:重用。 试试这个:一个函数将这对点作为它的参数。 在主程序中列出三个点,并遍历点列表。
from math import sqrt def distance(points): p1, p2 = points print " points:", p1, p2 x1, y1 = p1 x2, y2 = p2 print " coords:", x1, y1, x2, y2 distance = sqrt((x1 - x2)**2 + (y1 + y2)**2) return distance point_list = [ [(6, 5.7), (-9, 0)], [(0, 0), (4, 1)], [(100, -100), (500, 300)] ] for point_pair in point_list: print distance(point_pair)
输出:
points: (6, 5.7000000000000002) (-9, 0) coords: 6 5.7 -9 0 16.0464949444 points: (0, 0) (4, 1) coords: 0 0 4 1 4.12310562562 points: (100, -100) (500, 300) coords: 100 -100 500 300 447.2135955
Why do you have three functions to do exactly the same thing? This entirely defeats the purpose of a function: reuse. Try this: a single function that takes the pair of points as its argument. List the three points in your main program, and iterate through the list of points.
from math import sqrt def distance(points): p1, p2 = points print " points:", p1, p2 x1, y1 = p1 x2, y2 = p2 print " coords:", x1, y1, x2, y2 distance = sqrt((x1 - x2)**2 + (y1 + y2)**2) return distance point_list = [ [(6, 5.7), (-9, 0)], [(0, 0), (4, 1)], [(100, -100), (500, 300)] ] for point_pair in point_list: print distance(point_pair)
Output:
points: (6, 5.7000000000000002) (-9, 0) coords: 6 5.7 -9 0 16.0464949444 points: (0, 0) (4, 1) coords: 0 0 4 1 4.12310562562 points: (100, -100) (500, 300) coords: 100 -100 500 300 447.2135955
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