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问题 I would like to get the meters of a MKPolyline path so I can tell the user what are the meters left to finish the path. I've been searching for something to do it but I couldn't get anything. Thanks. 回答1: As tedious as it sounds, unless you want to do the maths yourself you're probably going to have to iterate thought the line's points , convert each to a CLLocation and use its -distanceFromLocation: between each, summing up to the appropriate total. 来源： https://stackoverflow.com/questions

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Eclipse - no Java (JRE) / (JDK) … no virtual machine I am trying to get Eclipse Indigo to re-Start on my computer - i have run it before with no problems but now i getting error like this; A java Runtime Environment (JRE) or Java Development kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations: C:\eclipse\jre\javaw.exe javaw.exe in your

问题 Here's what I have so far: import os.path as op for d in map(chr, range(98, 123)): #drives b-z if not op.isdir(d + ':/'): continue The problem is that it pops up a "No Disk" error box in Windows: maya.exe - No Disk: There is no disk in the drive. Please insert a disk into drive \Device\Harddisk1\DR1 [Cancel, Try Again, Continue] I can't catch the exception because it doesn't actually throw a Python error. Apparently, this only happens on removable drives where there is a letter assigned, but

问题 I need to delete clientside cookies with the same name but with different paths. What is the best way to do this in javascript. 回答1: Just specify the same path of the cookie you want to remove, giving it a past expiration. document.cookie = 'name=value1; path=/'; document.cookie = 'name=value2; path=/path/'; alert(document.cookie); // name=value1; name=value2 document.cookie = 'name=; path=/path/; expires=' + new Date(0).toUTCString(); alert(document.cookie); // name=value1 Changing it to

问题 I need to delete clientside cookies with the same name but with different paths. What is the best way to do this in javascript. 回答1: Just specify the same path of the cookie you want to remove, giving it a past expiration. document.cookie = 'name=value1; path=/'; document.cookie = 'name=value2; path=/path/'; alert(document.cookie); // name=value1; name=value2 document.cookie = 'name=; path=/path/; expires=' + new Date(0).toUTCString(); alert(document.cookie); // name=value1 Changing it to

问题 I downloaded "curl library" for use with a third party application. When I run the included cmake file, I get the following error. Please help me. I appreciate it: > The C compiler identification is MSVC 18.0.30501.0 > The CXX compiler identification is MSVC 18.0.30501.0 > Check for working C compiler using: Visual Studio 12 2013 > Check for working C compiler using: Visual Studio 12 2013 -- works > Detecting C compiler ABI info > Detecting C compiler ABI info - done > Check for working CXX

问题 Here is the URL: https://landfill.bugzilla.org/bugzilla-tip/ In my code I have this: Server server = new Server(host, port, path); From the URL, what is host, what is port and what is path? What are the input values of the method? 回答1: Host: landfill.bugzilla.org Port: 443 (default) Path: bugzilla-tip http://tools.ietf.org/html/rfc1738 回答2: Host: landfill.bugzilla.org Port: 443 (HTTPS) Path: /bugzilla-tip for more details please read this 回答3: Unfortunately the other answers in this question

问题 I have a directory bar inside a directory foo , with file foo_file.txt in directory foo and file bar_file.txt in directory bar ; i.e. computer$ ls foo/ computer$ ls foo/ bar/ foo_file.txt computer$ ls foo/bar/ bar_file.txt Using the python os.path.relpath function, I expect: os.path.relpath('foo/bar/bar_file.txt', 'foo/foo_file.txt') to give me: 'bar/bar_file.txt' However, it actually gives me: '../bar/bar_file.txt' Why is this? Is there an easy way to get the behavior I want? EDIT: This is

问题 I have a directory bar inside a directory foo , with file foo_file.txt in directory foo and file bar_file.txt in directory bar ; i.e. computer$ ls foo/ computer$ ls foo/ bar/ foo_file.txt computer$ ls foo/bar/ bar_file.txt Using the python os.path.relpath function, I expect: os.path.relpath('foo/bar/bar_file.txt', 'foo/foo_file.txt') to give me: 'bar/bar_file.txt' However, it actually gives me: '../bar/bar_file.txt' Why is this? Is there an easy way to get the behavior I want? EDIT: This is

问题 Is there a method to check if given path is full path? Right now im doing this: if (template.Contains(":\\")) //full path already given { } else //calculate the path from local assembly { } But there must be more elegant way for checking this? 回答1: Try using System.IO.Path.IsPathRooted ? It also returns true for absolute paths. System.IO.Path.IsPathRooted(@"c:\foo"); // true System.IO.Path.IsPathRooted(@"\foo"); // true System.IO.Path.IsPathRooted("foo"); // false System.IO.Path.IsPathRooted(