lines

问题 Below is how i count the number of lines in a text file. Just wondering is there any other methods of doing this? while(inputFile.hasNext()) { a++; inputFile.nextLine(); } inputFile.close(); I'm trying to input data into an array, i don't want to read the text file twice. any help/suggestions is appreciated. thanks 回答1: If you just want to add the data to an array, then I append the new values to an array. If the amount of data you are reading isn't large and you don't need to do it often

问题 I've searched for this a bit but I must be using the wrong terms - does ruby have a way to grep for a string/regex and also return the surrounding 5 lines (above and below)? I know I could just call "grep -C 5 ..." or even write my own method, but it seems like something ruby would have and I'm just not using the right search terms. 回答1: You can do it with a regular expression. Here's the string we want to search: s = %{The first line The second line The third line The fourth line The fifth

问题 I tried searching for this, but couldn't find much. It seems like something that's probably been asked before (many times?), so I apologize if that's the case. I was wondering what the fastest way to parse certain parts of a file in Ruby would be. For example, suppose I know the information I want for a particular function is between lines 500 and 600 of, say, a 1000 line file. (obviously this kind of question is geared toward much large files, I'm just using those smaller numbers for the

问题 Can I, in few commands, search and replace multiple lines in a file? I'm trying to replace the 3 failover blocks from dhcp_primary by the unique failover block from dhcp_secondary , within dhcp_primary . My goal is to copy the dhcpd.conf from a primary dhcp to the secondary (more information here: http://www.madboa.com/geek/dhcp-failover/). The failover work only if the configuration are identical, except the failover block of course; as you can see is the website's example. So I want to copy

问题 I have repeating data as follows .... 4 4 4 66 79 169 150 0 40928 40938 40923 40921 40789 40000 40498 5 4 3 16 22 247 0 40168 40911 40944 40205 40000 40562 6 4 4 17 154 93 309 0 40930 40919 40903 40917 40852 40000 40419 7 3 2 233 311 0 40936 40932 40874 40000 40807 .... This data is made up of 115 data blocks, and each data block have 4000 lines like that format. Here, I hope to put two new lines (number of line per data block = 4000 and empty line) at the begining of each data blocks, so it

问题 I have tried a dozen different ways and cannot get it right. I have many text files in different folders, so I would like to reference the input file as a variable eg: *.txt (just use whatever txt file is in the same folder as the bat file). I need to copy the first 6 lines and paste them into a new txt file. I would like to name it (but not essential) SAMPLE_original_txt_file_name EG: Input = text01.txt Output = SAMPLE_text01.txt (this would contain the first 6 complete lines from text01.txt

问题 My problem is solved about the columns not about the lines using skip=3 . This ignores the very 3 first lines. So what about ignoring all the lines after the first end word in the example below. 1121.19, 1638.66, 16.6098, -4.7339, -4.7339, 2.5, hash:0, -1, -1, -1, -1, 1888, 0, 0 971.597, 1815.17, 21.085, 1.39876E-006, 8, 4, hash:0, -1, -1, -1, -1, 1905, 0, 0 971.597, 1825.45, 21.085, 1.39876E-006, 8, 4, hash:0, -1, -1, -1, -1, 1905, 0, 0 end tcyc end mlop end lodm end slow end blok end So I

问题 Let's say I have an input text file of the following format: Section1 Heading Number of lines: n1 Line 1 Line 2 ... Line n1 Maybe some irrelevant lines Section2 Heading Number of lines: n2 Line 1 Line 2 ... Line n2 where certain sections of the file start with a header line that specifies how many lines are in that section. Each section heading has a different name. I have written a regular expression that will match the header line based on the header name the user searches for each section,

问题 I have an ImageView loading a picture in my Activity and want to draw some lines on it. It seems like I'm not able to overlay the lines I draw onto the ImageView. If I create a new class (myPainter) which extends 'View', hook myPainter.onDraw() and then setContentView(mp) in onCreate() from the activity, all I get are the drawn lines. My ImageView is gone from onCreate(). How do I get the ImageView and lines to show up in the same layout? I'm also Override'ing onTouch() for the ImageView so I

问题 I need to work on drawing a hierarchical tree structure (HV-Drawing – Binary Tree) with orthogonal lines(straight rectangular connecting lines) between root and children ( like the following: http://lab.kapit.fr/display/visualizationlayouts/Hierarchical+Tree+layout ). I want to know if there are any open source examples of the algorithm of drawing trees like that so that I can implement the same algorithm in actionscript. Thanks Palash 回答1: I did a C# version and put the code up on