extract

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Given a link from youtube e.g. http://www.youtube.com/watch?v=XHs99iVpnXU how do I extract the video id (the v parameter) without it being affected by other parameters such as feature= e.g. http://www.youtube.com

问题 Are there any built-in methods I can use to allow users to extract a file from the currently running JAR and save it on their disk? Thanks in advance. 回答1: Use getResourceAsStream (docs), you can do whatever you want with it after that. For a two-liner you could use one of the Commons IO copy methods. 回答2: File file = new File("newname.ext"); if (!file.exists()) { InputStream link = (getClass().getResourceAsStream("/path/resources/filename.ext")); Files.copy(link, file.getAbsoluteFile()

问题 #input my_string = 'abcdefgABCDEFGHIJKLMNOP' how would one extract all the UPPER from a string? #output my_upper = 'ABCDEFGHIJKLMNOP' 回答1: Using list comprehension: >>> s = 'abcdefgABCDEFGHIJKLMNOP' >>> ''.join([c for c in s if c.isupper()]) 'ABCDEFGHIJKLMNOP' Using generator expression: >>> ''.join(c for c in s if c.isupper()) 'ABCDEFGHIJKLMNOP You can also do it using regular expressions: >>> re.sub('[^A-Z]', '', s) 'ABCDEFGHIJKLMNOP' 回答2: import string s = 'abcdefgABCDEFGHIJKLMNOP' s

问题 I am a beginner with R. Now, I have a vector in a data.frame like this city Kirkland, Bethesda, Wellington, La Jolla, Berkeley, Costa, Evie KW172NJ Miami, Plano, Sacramento, Middletown, Webster, Houston, Denver, Kirkland, Pinecrest, Tarzana, Boulder, Westfield, Fair Haven, Royal Palm Beach, Fl Westport, Encino, Oak Ridge, I want to clean it. What I want is all the city names before the comma. How can I get the result in R? Thanks! 回答1: You can use gsub with a bit of regexp : cities <- gsub("^

问题 I'd like to extract audio stream from a FLV stream in C#. I searched in Google and I found FLVExtract, but it supports only extracting from FLV files, and not from streams. How can I do this? 回答1: I didn't find anything, so I had to write it myself. It is very fast and it's working great. Here's the code: protected byte[] ExtractAudio(Stream stream) { var reader = new BinaryReader(stream); // Is stream a Flash Video stream if (reader.ReadChar() != 'F' || reader.ReadChar() != 'L' || reader

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I'd need a .NET library so that using which I can extract text data from PDF, Excel and Word files. Ideally, a free tool! Would you recommend any? many thanks, 回答1: As someone who has spent many days looking for free solutions for (nearly) this exact problem, I can tell you fairly honestly that you will not find

问题 I am working with installers at the moment, and the first thing I thought of was to put a .zip file on a server and then having it download that and extract. However, I've seen installers run without an internet connection (which wouldn't work for mine), and they say "extracting files", not downloading. Is there some way to store files in an installer, and is there anything wrong with me having an installer like I currently do? 回答1: The overview of a Windows Installer setup is that files are

问题 I am trying to extract a value from an xml element, located in an XMLTYPE column in an Oracle Table. The xml element which I am trying to extract have a parent for which a namespace is defined. The xml looks something like: <a> <b xmlns="urn:www.someSite.com/myModel"> <c>my value</c> </b> </a> If I want to extract the content of the "a" element, its context is correctly returned: SELECT Extract(myColumn, '/a') FROM myTable; But for returning the content of the "c" element I didn't succeed to

问题 I am trying to extract a value from an xml element, located in an XMLTYPE column in an Oracle Table. The xml element which I am trying to extract have a parent for which a namespace is defined. The xml looks something like: <a> <b xmlns="urn:www.someSite.com/myModel"> <c>my value</c> </b> </a> If I want to extract the content of the "a" element, its context is correctly returned: SELECT Extract(myColumn, '/a') FROM myTable; But for returning the content of the "c" element I didn't succeed to

问题 I have checked out many pages but most of the tutorials and script return an error code with this type of JSON output. So how would I be able to extract the data from this JSON in Java?: [ { "user":{"id":"1","username":"user1"}, "item_name":"item1", "custom_field":"custom1" }, { "user":{"id":"2","username":"user2"}, "item_name":"item2", "custom_field":"custom2" }, { "user":{"id":"3","username":"user3"}, "item_name":"item3", "custom_field":"custom3" } ] 回答1: If you want to use Gson, then first