The first declaration: char buf[10] = “”; is equivalent to char buf[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; The second declaration: char buf[10] = ” “; is equivalent to char buf[10] = {‘ ‘, 0, 0, 0, 0, 0, 0, 0, 0, 0}; The third declaration: char buf[10] = “a”; … Read more
Here is a discussion of string content vs buffer content in the Emacs wiki. Just store your string as a variable. The tricky thing about strings is that you generally do not modify the string itself (except if you perform array functions on string, since a string is an array, but this should generally be … Read more
They are two different APIs that allow you to access the same stream of data blocks. The ‘readable’ API was introduced in Node 0.10.0 as part of “Streams 2”, so if you search for that, it should help. The core of the issue is that the ‘readable’ interface allows for much simpler managing and buffering … Read more
You need byteLength: var buff = fs.readFileSync(__dirname + ‘/test.txt’); console.log(Buffer.byteLength(buff)); For node 0.10.21 you can try this: Update buffer.toSTring() is unsafe, since buffers are meant to store binary data and toString() will attempt to do character encoding translation which will corrupt the binary data. console.log(buff.toString().length);
An InputStream ties up a tiny kernel resource, a low level file handle. In addition, the file will be locked to some extent (from delete, renaming), as long as you have it open for read. Lets imagine you didn’t care about the locked file. Eventually, if you need to read another file, and open it … Read more
You can call elisp functions directly. So to open a file, call find-file on the filename. Example: ~ $ ls myfile ~ $ (find-file “myfile”) Parentheses and quotes are optional, so this works too: ~ $ find-file myfile
Windows file caching is very effective, especially if you are using Vista or later. TFileStream is a loose wrapper around the Windows ReadFile() and WriteFile() API functions and for many use cases the only thing faster is a memory mapped file. However, there is one common scenario where TFileStream becomes a performance bottleneck. That is … Read more
Fundamentally, you need to understand two things: Vertex Array Objects (VAOs) are conceptually nothing but thin state wrappers. Vertex Buffer Objects (VBOs) store actual data. Another way of thinking about this is that VAOs describe the data stored in one or more VBOs. Think of VBOs (and buffer objects in general) as unstructured arrays of … Read more
Often, this behavior is useful. When you don’t want it, you can instead do the usual yank, then paste (officially, ‘put’) with “0p. You can do this however many times you like. See :help v_p for more. If you want to avoid the overwrite, you need to delete first. You can use “_ to select … Read more
As Trey Jackson said, you want to put this: (savehist-mode) in your Emacs start up file, then restart Emacs. (Calling it interactively will stomp on your current mini-buffer history, so you may not want to do that.) It’s also worth pointing out that you can persist other variables across sessions by adding them to savehist-additional-variables, … Read more