Require the JSON library, and use to_json. require ‘json’ tempHash = { “key_a” => “val_a”, “key_b” => “val_b” } File.open(“public/temp.json”,”w”) do |f| f.write(tempHash.to_json) end Your temp.json file now looks like: {“key_a”:”val_a”,”key_b”:”val_b”}
To process a file line-by-line, you simply need to decouple the reading of the file and the code that acts upon that input. You can accomplish this by buffering your input until you hit a newline. Assuming we have one JSON object per line (basically, format B): var stream = fs.createReadStream(filePath, {flags: ‘r’, encoding: ‘utf-8’}); … Read more
You have a JSON Lines format text file. You need to parse your file line by line: import json data = [] with open(‘file’) as f: for line in f: data.append(json.loads(line)) Each line contains valid JSON, but as a whole, it is not a valid JSON value as there is no top-level list or object … Read more
I used the following code to create a temporary file for writing bytes. And its working fine. File file = new File(Environment.getExternalStorageDirectory() + “https://stackoverflow.com/” + File.separator + “test.txt”); file.createNewFile(); byte[] data1={1,1,0,0}; //write the bytes in file if(file.exists()) { OutputStream fo = new FileOutputStream(file); fo.write(data1); fo.close(); System.out.println(“file created: “+file); } //deleting the file file.delete(); System.out.println(“file deleted”);
My suggestion is to take a “white list” approach, meaning don’t try and filter out bad characters. Instead define what is OK. You can either reject the filename or filter it. If you want to filter it: String name = s.replaceAll(“\\W+”, “”); What this does is replaces any character that isn’t a number, letter or … Read more
If you don’t want to close and reopen the file, to avoid race conditions, you could truncate it: f = open(filename, ‘r+’) text = f.read() text = re.sub(‘foobar’, ‘bar’, text) f.seek(0) f.write(text) f.truncate() f.close() The functionality will likely also be cleaner and safer using open as a context manager, which will close the file handler, … Read more
$(“#logo”).css(‘opacity’,’0′); $(“#select_logo”).click(function(e){ e.preventDefault(); $(“#logo”).trigger(‘click’); }); <script src=”https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js”></script> <a href=”#” id=”select_logo”>Select Logo</a> <input type=”file” id=”logo”> for IE add this: $(“#logo”).css(‘filter’,’alpha(opacity = 0′);
The documentation of the file module says If state=file, the file will NOT be created if it does not exist, see the copy or template module if you want that behavior. So we use the copy module, using force=no to create a new empty file only when the file does not yet exist (if the … Read more
Yes, you need to specify the encoding of the file you want to read. Yes, this means that you have to know the encoding of the file you want to read. No, there is no general way to guess the encoding of any given “plain text” file. The one-arguments constructors of FileReader always use the … Read more
Found this on a different forum If you’re wondering why that leading zero is important, it’s because permissions are set as an octal integer, and Python automagically treats any integer with a leading zero as octal. So os.chmod(“file”, 484) (in decimal) would give the same result. What you are doing is passing 664 which in … Read more