I’ve now put together a simple example program on GitHub: https://github.com/ulfalizer/readline-and-ncurses. It supports seamless and efficient terminal resizing and multibyte/combining/wide characters. The code has helpful comments. Screenshot below:
What you are asking is possible with Readline. There’s a callback where you can get control after the prompt is displayed and insert some text into the read buffer. This worked for me: Readline.pre_input_hook = -> do Readline.insert_text “hello.txt” Readline.redisplay # Remove the hook right away. Readline.pre_input_hook = nil end input = Readline.readline(“Filename: “, false) … Read more
You are looking for std::getline(). For example: #include <string> std::string str; std::getline(std::cin, str); I’ve little idea what you mean when you say I must also be able to store the value through a pointer. Update: Looking at your updated question, I can imagine what is happening. The code that reads the choice, i.e. the number … Read more
In case someone’s wandering in here recently, IPython 5.0 switched from readline to prompt_toolkit, so an updated answer to this question is to pass an option: $ ipython –TerminalInteractiveShell.editing_mode=vi … or to set it globally in the profile configuration (~/.ipython/profile_default/ipython_config.py; create it with ipython profile create if you don’t have it) with: c.TerminalInteractiveShell.editing_mode=”vi”
The latest version of golang.org/x/text/encoding/unicode makes it easier to do this because it includes unicode.BOMOverride, which will intelligently interpret the BOM. Here is ReadFileUTF16(), which is like os.ReadFile() but decodes UTF-16. package main import ( “bytes” “fmt” “io/ioutil” “log” “strings” “golang.org/x/text/encoding/unicode” “golang.org/x/text/transform” ) // Similar to ioutil.ReadFile() but decodes UTF-16. Useful when // reading data … Read more
You have to remember the position by calling file.tell() before the readline and then calling file.seek() to rewind. Something like: fp = open(‘myfile’) last_pos = fp.tell() line = fp.readline() while line != ”: if line == ‘SPECIAL’: fp.seek(last_pos) other_function(fp) break last_pos = fp.tell() line = fp.readline() I can’t recall if it is safe to call … Read more
lines = open(filename).read().splitlines()
I open info readline and found: — Function: int rl_expand_prompt (char *prompt) Expand any special character sequences in PROMPT and set up the local Readline prompt redisplay variables. This function is called by `readline()’. It may also be called to expand the primary prompt if the `rl_on_new_line_with_prompt()’ function or `rl_already_prompted’ variable is used. It returns … Read more
Just in case someone stumbles upon here in future Node 11.7 added support for this using async await const readline = require(‘readline’); //const fileStream = fs.createReadStream(‘input.txt’); const rl = readline.createInterface({ input: process.stdin, //or fileStream output: process.stdout }); for await (const line of rl) { console.log(line) } Remember to wrap it in async function(){} otherwise you … Read more
Apple does not ship GNU readline with OS X. It does ship BSD libedit which includes a readline compatibility interface. The system Pythons shipped by Apple and the 64-bit/32-bit Pythons from python.org installers are built with libedit. The problem is that the commands supported by libedit are completely different from those of readline (see for … Read more