You can add the following to the AndroidManifest.xml file inside the activity that has to open the file (pdf in our case) <intent-filter > <action android:name=”android.intent.action.VIEW” /> <category android:name=”android.intent.category.DEFAULT” /> <data android:mimeType=”application/pdf” /> </intent-filter> Make sure you specify the proper mime format. The user will be prompted to choose your app if she wants to … Read more
Use FileChannel.truncate: try (FileChannel outChan = new FileOutputStream(f, true).getChannel()) { outChan.truncate(newSize); }
I check Header PDF like this: public bool IsPDFHeader(string fileName) { byte[] buffer = null; FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fs); long numBytes = new FileInfo(fileName).Length; //buffer = br.ReadBytes((int)numBytes); buffer = br.ReadBytes(5); var enc = new ASCIIEncoding(); var header = enc.GetString(buffer); //%PDF−1.0 // If you are loading it into … Read more
I like the idea of using freopen. You might also be able to redirect stdout to a pipe using dup and dup2, and then use read to grab data from the pipe. Something like so: #include <stdio.h> #include <stdlib.h> #include <unistd.h> #define MAX_LEN 40 int main( int argc, char *argv[] ) { char buffer[MAX_LEN+1] = … Read more
Many of the answers above are quite old. In 2013 a much simpler solution exists: nearly all current browsers… Chrome IE Safari Firefox with a few-line fix pass through click events from labels. Try it here: http://jsfiddle.net/rvCBX/7/ Style the <label> however you you would like your file upload to be. Set for=”someid” attribute on the … Read more
Here’s a solution I’ve created, that allows you to create and download a file in a single click: <html> <body> <button onclick=’download_file(“my_file.txt”, dynamic_text())’>Download</button> <script> function dynamic_text() { return “create your dynamic text here”; } function download_file(name, contents, mime_type) { mime_type = mime_type || “text/plain”; var blob = new Blob([contents], {type: mime_type}); var dlink = document.createElement(‘a’); … Read more
You’re thinking it wrong. What you are trying to do: If stdin exists use it, else check whether the user supplied a filename. What you should be doing instead: If the user supplies a filename, then use the filename. Else use stdin. You cannot know the total length of an incoming stream unless you read … Read more
This is the problem: while (br.readLine() != null) { System.out.println(br.readLine()); } You’ve got two calls to readLine – the first only checks that there’s a line (but reads it and throws it away) and the second reads the next line. You want: String line; while ((line = br.readLine()) != null) { System.out.println(line); } Now we’re … Read more
Try: chunk_size = 4 * 1024 * 1024 # MB with open(‘large_file.dat’,’rb’) as f: for chunk in iter(lambda: f.read(chunk_size), b”): handle(chunk) iter needs a function with zero arguments. a plain f.read would read the whole file, since the size parameter is missing; f.read(1024) means call a function and pass its return value (data loaded from … Read more
To check if a folder contains at least one file >nul 2>nul dir /a-d “folderName\*” && (echo Files exist) || (echo No file found) To check if a folder or any of its descendents contain at least one file >nul 2>nul dir /a-d /s “folderName\*” && (echo Files exist) || (echo No file found) To … Read more