filenames

问题 How can I determine the maximum filename length on a linux box? Preferred in PHP programming language. 回答1: You want pathconf or fpathconf, which are not exposed (yet) in PHP. (When they are, they'll probably be posix_pathconf .) You may also shell out to getconf, a command-line utility interface to the same functionality. Try this on your system: $ getconf NAME_MAX /tmp $ getconf PATH_MAX /tmp 回答2: there's no need to programatically determine it. it's 255 bytes. edit: you can have longer

问题 I am trying to copy only certain files from one folder to another. The filenames are in a attribute table of a shapefile. I am successful upto writing the filenames into a .csv file and list the column containing the list of the filenames to be transferred. I am stuck after that on how to read those filenames to copy them to another folder. I have read about using Shutil.copy/move but not sure how to use it. Any help is appreciated. Below is my script: import arcpy import csv import os import

问题 How do I determine whether a given string is a valid Windows filename? I'm thinking of some function that I can give a string and that returns a boolean. It should check for disallowed characters (<>:"/\|?*) and for reserved words (CON, PRN, et cetera). isValidWindowsFilename('readme.txt'); // true isValidWindowsFilename('foo/bar'); // false isValidWindowsFilename('CON'); // false I've found a MSDN reference describing exactly what is valid: http://msdn.microsoft.com/en-us/library/windows

问题 Some websites seem to have file names such as 'assets/app-02b4523sev8fsd56e.js'. I have noticed that these numbers do not change though, so I thought it has something to do with security but I am not sure. Is there any reason behind this? 回答1: This is normally to break caches stored by the browser so that the latest version of a file is loaded. Every time a file is changed this value will normally be changed also. This can be done manually by changing the filename and/or the paths in other

问题 I am having a quite annoying problem. I want to get the current date/time and insert it into a filename but I can't for my life get it to work. I want to get the time as 2011-11-18 12:13:57 and then insert it into my filename filename-2011-11-18-12:13:57.tar.gz I have tried SimpleDateFormat etc. but it just won't work! (I am writing in Eclipse Indigo) 回答1: You can use this: import java.text.SimpleDateFormat; // ... SimpleDateFormat formatter = new SimpleDateFormat("yyyy_MM_dd_HH_mm_ss",

问题 I would like to know the character encoding of the file names in a filesystem in order to display correctly them in a GUI. How should I do this ? I suppose I get different character encoding depending on the file system (FAT, NTFS, ext3, etc.) Thank you (I work in C++ but this topic is not language related) 回答1: NTFS is Unicode (UTF-16). exFAT is Unicode as well. Original FAT and fAT32 use OEM character set (read more on MSDN). On Linux and Unix filename may contain any bytes except NUL and

问题 I tried <target name="txtFile" xsi:type="File" fileName="${date:format=yyyy-MM-dd HH-mm-ss}.txt" layout="${longdate} ${level} ${message}"/> but it creates a new file each minute. I realize that there is ${processinfo:property=StartTime} but I couldn't format it. I tried: ${processinfo:property=StartTime:format=yyyy-MM-dd HH-mm-ss} but it doesn't work 回答1: Using the Cached Layout Renderer For a solution that doesn't require code, use the Cached Layout Renderer: <target name="txtFile" xsi:type=

问题 I have need to extract the real and imaginary elements of a complex number in python. I know how to make a list into a complex number... but not the other way around. I have this: Y = (-5.79829066331+4.55640490659j) I need: Z = (-5.79829066331, 4.55640490659) and I will also need each part if there is a way to go directly without going by way of Z: A = -5.79829066331 B = 4.55640490659 https://docs.python.org/2/library/functions.html#complex Thanks! 回答1: Y = (-5.79829066331+4.55640490659j) Z =

问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: How remove extension from string (only real extension!) I am brand new to php and have a lot to learn! I'm experimenting with MiniGal Nano for our King County Iris Society website. It work quite well for our purposes with one small exception: the photo file name needs to be visible under the thumbnail. I've created a work around, but it shows the extension. I've found code samples of functions but have no idea

问题 Good morning guys Is there a good way to use regular expression in C# in order to find all filenames and their paths within a string variable? For example, if you have this string: string s = @"Hello John these are the files you have to send us today: <file>C:\Development\Projects 2010\Accounting\file20101130.csv</file>, <file>C:\Development\Projects 2010\Accounting\orders20101130.docx</file> also we would like you to send <file>C:\Development\Projects 2010\Accounting\customersupdated.xls<