I love to learn and try new languages. Not only is learning a new language fun, many times it teaches me something new about a language that I am already familiar with. The only problem that I have with learning so many languages, is keeping them straight. I decided that I would take a few of the dynamic languages I use most often and compile a list of how to handle File I/O with each of them. If you have a Dynamic language(part 2 of this post will be on static languages) not represented below or have another method of File I/O with the represented languages, please add to the list with its respective File I/O code:D
Without further ado…
//Groovy open file for writing def target ="filename" File wf= new File(target) wf.write( "I am in your file eating your space" ) //Groovy one liner new File('filename.txt').text = 'First line of text!' //Groovy open file for appending def target ="filename" File af= new File(target) af.append("I have all of your base") //Groovy read each line in file new File("filename").eachLine{line-> println line} //Groovy read whole document and put into List List lines = new File("filename").readLines() //lines contains two lines that we need println "first line $lines[0]" println "second line $lines[1]" //Groovy reading one line File rf= new File("filename") //open for reading //read first line, trim, assign to tmp rf.withReader { line ->tmp = line.readLine().trim()} //Groovy test if file exists File src = new File(srcFile) if (src.exists() ){ println "I exist"} else{println "I don't exist"} #Ruby openfile for reading fh = File.new(path, "r") # open file "path" for reading only fh.close #Ruby open file for writing fout  = File.new(path, "w") # open file "path" for writing only fout.puts "Up, Up, Down, Down, Left, Right, Left, Right, B, A, Select, Start" fout.close #Ruby open file for apending fa= File.new("DeleteMe.txt","a") fa.puts "I am at the end of file" fa.close #Ruby read eachline in a file File.open("file").each { |line| p line} #Ruby read entire file to string fh = File.new(filename) str = fh.read #Ruby read entire file into array(each line is an element in the array) fh = File.new(filename) str = fh.readlines #Python Write a file fout = open("DeletMe.txt", "w") fout.write("Writing to fout\nCheck it out!") fout.close() #Python Read an entire file fin = open("ReadingTest.txt", "r") fin_text = fin.read() fin.close() print fin_text #Python read entire file into list fin = open("ReadingTest.txt", "r") txt= fin.readlines() fin.close() print txt[0] #Python append to a file fh= open ( 'DeleteMe.txt', 'a' ) fh.write ( '\n\n\nBottom line.' ) fh.close() #Perl reading a file open(FILE, '<', $file) or die "Can't read $file: $!\n"; while(<FILE>) { print ; } #Perl append to a file open(FILE, '>>', $file) or   die "Can't append to $file: $!\n"; print FILE "text"; close(FILE); #Perl read and write to a file #+< allows reading and writing, and keeps the data that was #already in the file. open() will fail if file doesn't exist. open(FILE, "+<$file" ) or die ("Can't read|write: $file\n"); close(FILE); #Perl read and write to a file #+>allows writing and reading, but replaces/overwrites the #data in the file if the file exists. Creates it if it doesn't exist. open(FILE, "+>$file" ) or die ("Can't write or read:$file \n"); close(FILE);
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