I am writing a Ruby script to generate a CSV file.
My understanding is that each line in a CSV file is a row in a table.
Right now my script generates something looks like this
Vancouver, Calgary,
Routes1,
Routes2,
Routes3,
Vancouver, Toronto
etc,
etc,
etc
but I need it to make it look like this to import it to a DB
Vancouver, Calgary, Routes1, Routes2, Routes3
Vancouver, Toronto, etc etc etc..
My script works by looking up Vancouver and Calgary from raw data that contains the locations of the routes in different files. Then the script goes to those files to look for actual routes. Each time it finds a route (eg. Route1), the script outputs it using "puts" method.
The problem is that every output is on a new line.
Is there a way to suppress the new line command when using "puts" command?
Yes, use print var instead; puts automatically appends a new line, print doesn't.
Related
but I have a question about a small piece of code using the awk command. I have not found an answer/solution anywhere.
I am trying to parse an output file and extract all data between the 1st expression (including) ATOMIC and 2nd expression (excluding) Bond. This data is to be sent to a new file $1_geom. So far I have the following:
`awk '/ATOMIC/{flag=1;next}/Bond lengths in Bohr/{flag=0}flag' $1` >> $1_geom
This script will extract the correct data for me, but there are 2 problems:
The line ATOMICis not extracted with the data
The data is extracted and appended to a single line. I want the data to retain the formatting from the parsed file (5 columns, variable amount of lines). Please see attachment to see a visual. Visual Example Attachment. Is there a different way to append data (other than >>) so that I can keep formatting?
Any help is appreciated, thank you.
The next is causing the first match to be skipped; take it out if you don't want that.
The backticks by themselves are a shell syntax error (unless your Awk script happens to produce valid shell commands). I'm guessing you have a useless echo or something like that in your actual script which disarms the error, but instead produces the symptoms you describe.
This was part of a code in a csh script and I did have an "echo" in front of this line. Removing the "echo" makes it work perfectly and addresses the 2 questions that I had.
I want to compare particular line of two text file and update one of the file if they are not same.
Updating a line in a text file is technically not possible (unless the replacing line is of exactly the same length). You have to create a new file, which you can, in the end, move to the old one.
From your tags, I assume that you are looking for a shell solution, which is maybe not a good idea. It's probably more convenient to do it in, for instance, Perl or Ruby or Python.
One possibility is to use the commands head and tail, which allow you to dissect a file into parts. You can split your file into three parts: The part before the line in question, the line itself, and the lines which come after.
Another possibility is to use a loop and the read command of the shell to process a file line by line, like this:
while read line
do
... # Decide here, whether to write $line or the replacement line
done <your_file
I'm trying to filter out all file names from an SQLite text dump using Ruby. I'm not very handy/familiar with regex and need a way to read, and write to a file, another dump of image files that are within the SQLite dump. I can filter out everything except stuff like this:
VALUES(3,5,1,43,'/images/e/e5/Folder%2FOrders%2FFinding_Orders%2FView_orders3.JPG','1415',NULL);
and this:
src="/images/9/94/folder%2FGraph.JPG"
I can't figure out the easiest way to filter through this. I've tried using split and other functions, but instead of splitting the string into an array by the character specified, it just removed the character.
You should be able to use .gsub('%2', ' ') the %2 with a space, while quoted, it should be fine.
Split does remove the character that is being split, though. So you may not want to do that, or if you do, you may want to use the Array#join method with the argument of the character you split with to put it back in.
I want to 'extract' the file name from the statements above. Say I have src="/images/9/94/folder%2FGraph.JPG", I want folder%2FGraph.JPG to be extracted out.
If you want to extract what is inside the src parameter:
foo = 'src="/images/9/94/folder%2FGraph.JPG"'
foo[/^src="(.+)"/, 1]
=> "/images/9/94/folder%2FGraph.JPG"
That returns a string without the surrounding parenthesis.
Here's how to do the first one:
bar = "VALUES(3,5,1,43,'/images/e/e5/Folder%2FOrders%2FFinding_Orders%2FView_orders3.JPG','1415',NULL);"
bar.split(',')[4][1..-2]
=> "/images/e/e5/Folder%2FOrders%2FFinding_Orders%2FView_orders3.JPG"
Not everything in programming is a regex problem. Somethings, actually, in my opinion, most things, are not candidates for a pattern. For instance, the first example could be written:
foo.split('=')[1][1..-2]
and the second:
bar[/'(.+?)'/, 1]
The idea is to use whichever is most clean and clear and understandable.
If all you want is the filename, then use a method designed to return only the filename.
Use one of the above and pass its output to File.basename. Filename.basename returns only the filename and extension.
I have an array that looks like
Ant run name : Basics of Edumate
Overall result : pass
Ant run took: 4 minutes 13 seconds
--------------------------
Details for all test suits
--------------------------
login : Pass
AddCycleTemplate: Pass
AddCycleTemplate: Pass
AddAcademicYear : Pass
AddAcademicYear : Pass
AddCampus : Pass
Is there any easy way how I can convert this in ruby into html that keeps the formatting?
If these are the only kinds of lines you will ever see, then you could certainly write a Ruby script that does the following:
First, output a doctype declaration, an opening html tag, an head section, an opening body tag, and an opening table tag with whatever style you like.
Read your Ant output line by line. If the line has a colon in it, split it on the colon and output a table row with two columns (each side of the split). If the line does not have a colon write its text as colspan=2, perhaps with a style indicating a large margin-top and margin-bottom, except if it is all dashes in which case you should ignore it.
Output HTML to close the table and the body.
This is certainly a hack and not a general solution by any means, but hey if you are writing a tool just for yourself so you can have some pretty little ant outputs, go for it. This is no more than 20 lines of Ruby. Write it to read from stdin and write to stdout so you can pipe your ant output to it!
if you don't care about formatting, just encapsulate the entire thing in <pre></pre> tags and you're set. All new lines and whitespaces will be preserved and default font is a monospaced one.
I have been looking at regular expressions to try and do this, but the most I can do is find the start of a line with ^, but not replace it.
I can then find the first characters on a line to replace, but can not do it in such a way with keeping it intact.
Unfortunately I don´t have access to a tool like cut since I am on a windows machine...so is there any way to do what I want with just regexp?
Use notepad++. It offers a way to record an sequence of actions which then can be repeated for all lines in the file.
Did you try replacing the regular expression ^ with the text you want to put at the start of each line? Also you should use the multiline option (also called m in some regex dialects) if you want ^ to match the start of every line in your input rather than just the first.
string s = "test test\ntest2 test2";
s = Regex.Replace(s, "^", "foo", RegexOptions.Multiline);
Console.WriteLine(s);
Result:
footest test
footest2 test2
I used to program on the mainframe and got used to SPF panels. I was thrilled to find a Windows version of the same editor at Command Technology. Makes problems like this drop-dead simple. You can use expressions to exclude or include lines, then apply transforms on just the excluded or included lines and do so inside of column boundaries. You can even take the contents of one set of lines and overlay the contents of another set of lines entirely or within column boundaries which makes it very easy to generate mass assignments of values to variables and similar tasks. I use Notepad++ for most stuff but keep a copy of SPFSE around for special-purpose editing like this. It's not cheap but once you figure out how to use it, it pays for itself in time saved.