line

问题 How can I delete a single, specific line from a text file? For example the third line, or any other line. I tried this: line = 2 file = File.open(filename, 'r+') file.each { last_line = file.pos unless file.eof? } file.seek(last_line, IO::SEEK_SET) file.close Unfortunately, it does nothing. I tried a lot of other solutions, but nothing works. 回答1: I think you can't do that safely because of file system limitations. If you really wanna do a inplace editing, you could try to write it to memory,

问题 A RichTextBox puts extra space between lines when a user presses enter or inserts text, and that's what I'm trying to get away from. I searched around and the only decent solution I found is this one: Setter SetParagraphMargin = new Setter(); SetParagraphMargin.Property = Paragraph.MarginProperty; SetParagraphMargin.Value = new Thickness(0); Style style = new Style(); style.TargetType = typeof(Paragraph); style.Setters.Add(SetParagraphMargin); rtb.Resources.Add("Style", style); But this still

问题 Hey guys I am writing a parser code to read a .csv file and parse it to XML. This is the code I have and it works fine except I would like it to skip the first line in the file. So I decided to set up a HashMap but it does seem to work: for (int i = 0; i < listOfFiles.length; i++) { File file = listOfFiles[i]; if (file.isFile() && file.getName().endsWith(".csv")){ System.out.println("File Found: " + file.getName());//Prints the name of the csv file found String filePath = sourcepath + "\\" +

问题 I used to draw lines (given some start and end points) at pygame like this: pygame.draw.line(window, color_L1, X0, X1, 2) , where 2 was defining the thickness of the line. As, anti-aliasing is not supported by .draw , so I moved to .gfxdraw and pygame.gfxdraw.line(window, X0[0], X0[1], X1[0], X1[1], color_L1) . However, this does not allow me to define the thickness of the line. How could I have thickness and anti-aliasing together? 回答1: After many trials and errors, the optimal way to do it

问题 I want to display the line number in a textarea like this is possible in jQuery: I looked for answers on SO but I can't find what I want Display current line and column number for a textarea Limit number of lines in textarea and Display line count using jQuery Also, the solution I tried from the JSFiddle provided from the comments show me the textarea like this: which line 1234 is the first line and the second line is 5678 回答1: Download the plugin found here: http://alan.blog-city.com

问题 I have to draw a circle with a number in each piece of my circle. My problem is i can't center the text where i want. Why the center to draw the text is not the same than the center to draw the line ??? sfdzqgs fsdgf dsbfd ds ds fdg sfgnfhggdf wdvfbdfsf dsgfhdr sdgfdshstqrssgqg sqfgshdf dgerfztiaruhis rguhtrqiorgeuqzengoh bçzioqrgethriZQGEHOQRAGIRGOGfjfn fgkjkjvfrejn eofnbfoig vjlj vvjfndbjfdnj figsn /*enter code here * Author : * date : 06/12/2013 * * * enter code here */ package com.example

问题 This question already has answers here : Printing newlines with print() in R (4 answers) Closed 5 years ago . How can we insert a new line when using the function paste() or any function that concatenates strings in R? There are many web pages on this topic but none answers clearly or gives a solution that works. I precise I don't want to use the function cat, I need to work with string of characters. Here are all my attempts (derived from all the suggestions on from different forum), they

问题 This question already has an answer here : Are there really only 4 Matplotlib Line Styles? (1 answer) Closed 3 years ago . In Python, using matplotlib, is there a way to change the distance of the dashes for different linestyles, for example, using the following command: plt.plot(x,y,linestyle='--') 回答1: You can directly specify the dashes length/space using the dashes=(length, interval space) argument inside the plot command. import matplotlib.pyplot as plt fig,ax = plt.subplots() ax.plot([0

问题 Is there a way to search, from a string, a line containing another string and retrieve the entire line? For example: string = qwertyuiop asdfghjkl zxcvbnm token qwerty asdfghjklñ retrieve_line("token") = "token qwerty" 回答1: you mentioned "entire line" , so i assumed mystring is the entire line. if "token" in mystring: print mystring however if you want to just get "token qwerty", >>> mystring=""" ... qwertyuiop ... asdfghjkl ... ... zxcvbnm ... token qwerty ... ... asdfghjklñ ... """ >>> for