text-files

问题 I love how in python I can do something like: points = [] for line in open("data.txt"): a,b,c = map(float, line.split(',')) points += [(a,b,c)] Basically it's reading a list of lines where each one represents a point in 3D space, the point is represented as three numbers separated by commas How can this be done in C++ without too much headache? Performance is not very important, this parsing only happens one time, so simplicity is more important. P.S. I know it sounds like a newbie question,

问题 I love how in python I can do something like: points = [] for line in open("data.txt"): a,b,c = map(float, line.split(',')) points += [(a,b,c)] Basically it's reading a list of lines where each one represents a point in 3D space, the point is represented as three numbers separated by commas How can this be done in C++ without too much headache? Performance is not very important, this parsing only happens one time, so simplicity is more important. P.S. I know it sounds like a newbie question,

问题 I have a simple form with two textboxes, I want Textbox1 to write to a file named C:\VALUE1.txt and Textbox2 to write its value to a file named C:\VALUE2.txt Any text that is already in the text file MUST be over written. 回答1: It's worth being familiar with both methods: 1) In VB.Net you have the quick and easy My.Computer.FileSystem.WriteAllText option: My.Computer.FileSystem.WriteAllText("c:\value1.txt", TextBox1.Text, False) 2) Or else you can go the "long" way round and use the

问题 I want to make a website where there is a button, and when you click it make it change some text (saying either true/false). The text must change when the user clicks the button, but not just for the one user, for every user that's on the site. The way I'm trying to do it is I have a text file, and so far all I've got is some text on the page that every 500 milliseconds is refreshing to display whatever is in the text file. So now all I need to do is update the text file when the button is

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I am hoping the wonderful experts here can assist me with my problem. I have found this site extremely useful in the past in solving other issues I have had but I have searched this site and tried all the answers similar to my problem but cant seem to get any of them to work for

问题 Consider the following text(csv) file: 1, Some text 2, More text 3, Text with comma, more text How to load the data into a 2D array in Octave? The number can go into the first column, and all text to the right of the first comma (including other commas) goes into the second text column. If necessary, I can replace the first comma with a different delimiter character. 回答1: AFAIK you cannot put stings of different size into an array. You need to create a so called cell array. A possible way to

问题 I am on Windows and using diff to compare two text files. It was working successfully for small files but, when I start comparing 2GB file with another 2GB file it shows me: diff: C:/inetpub/wwwroot/webclient/database_sequences/est_mouse_2.txt: Permission denied My code: $OldDatabaseFile = "est_mouse_1"; $NewDatabaseFile = "est_mouse_2"; shell_exec("C:\\cygwin64\\bin\\bash.exe --login -c 'diff $text_files_path/$OldDatabaseFile.txt $text_files_path/$NewDatabaseFile.txt > $text_files_path

问题 I am creating a java console application and i need to use a notepad (txt) file to store PIN, AccountNo and Balance. When the user enters the PIN (from BufferedReader) it should get validated from the notepad file and login to thge system. However, the code fragment which I used below only displays Enter PIN, and when i click on Enter, the program exits. Could you please tell me what is the mistake which I have done here? BufferedReader getIt = new BufferedReader(new InputStreamReader(System

问题 This is the code. It checks if the file in path exists, if not, it creates the file. I'm getting this error message all the time and I don't know why. Maybe I should close the System.IO.Directory.Exists? If yes, how do I do that? Just so you know, I'm creating a text file. The code If Not (System.IO.Directory.Exists(path)) Then Dim fs3 As FileStream = File.Create(path) End If This is the error message I get: Process can't use the file (path) because some other process is using this file at

问题 I need help in reading these textfiles, somehow when i do a recursive loop, the other loop always gets reset to the 1st line. import sys import codecs # there are actually more utf-8 char to the lines, so i needed codecs reload(sys) sys.setdefaultencoding('utf-8') reader = codecs.open("txtfile1", 'r', 'utf-8') reader2 = codecs.open("txtfile2", 'r', 'utf-8') for row in reader: print row[0:11] # here the outer loops is running the cycles for row2 in reader2: print row[0:11] # here the outer