hors

Awesome program howdoi which implemented in rust, along with easily usage lib.

It's faster than the original howdoi program.

For binary usage, please go through the rest of this file. For lib documentation, please check here.

Screenshot

Simple usage example

More examples

Installation

hors is written in Rust. The recommended way to install hors is through cargo.

cargo install hors

On Windows/Linux/macOS platform, you can download the pre-build-binary from github release page

On macOS

Hors can be installed from homebrew.

brew tap hors-org/hors && brew install hors

On Windows

Hors can be installed from scoop

scoop bucket add w-bucket https://github.com/hors-org/w-bucket; scoop install hors

What make it fast

1. Implemented in rust, which causes less runtime overhead.
2. Make use of tokio concurrent feature, so hors will make concurrent search when it need to fetch more than 1 answer.
3. Output will be cache, and when you want to search for the same question, hors will likely make less network traffic to get the answer.

Here is a simple benchmark report, run the following command 3 times in my personal computer:

time hors mysql create table with column comment -a -n 10 --paging never -e bing
rm ~/Library/Caches/hors/answers

Note: run rm command is aimed to clear local cache.

And it gives me the following output:

Executed in    2.55 secs   fish           external
   usr time  232.71 millis  150.00 micros  232.56 millis
   sys time   16.68 millis  562.00 micros   16.12 millis

Executed in    3.68 secs   fish           external
   usr time  252.02 millis  125.00 micros  251.90 millis
   sys time   19.18 millis  550.00 micros   18.63 millis

Executed in    2.55 secs   fish           external
   usr time  237.19 millis  117.00 micros  237.07 millis
   sys time   17.63 millis  565.00 micros   17.06 millis

Run the same command with howdoi:

time howdoi mysql create table with column comment -a -n 4 -e bing -c
rm ~/Library/Caches/howdoi/*

Note: run rm command is aimed to clear howdoi local cache.

And it gives me the following output:

Executed in    3.48 secs   fish           external
   usr time  303.67 millis  127.00 micros  303.54 millis
   sys time   52.53 millis  601.00 micros   51.93 millis

Executed in    3.65 secs   fish           external
   usr time  305.37 millis  111.00 micros  305.26 millis
   sys time   53.16 millis  549.00 micros   52.61 millis

Executed in    3.34 secs   fish           external
   usr time  319.07 millis   14.24 millis  304.83 millis
   sys time   55.63 millis    3.37 millis   52.26 millis

But please note that this simple benchmark is not precise, it highly depends on network information.

Tested platforms

For now, hors has been tested with the following platforms:

• Linux
• OSX
• Windows

Usage

USAGE:
    hors [FLAGS] [OPTIONS] [query]...

ARGS:
    <query>...

FLAGS:
    -a, --all              display the full text of answer.
        --clear-cache      just clear local hors cache.
    -d, --disable-proxy    Disable system proxy.
    -h, --help             Prints help information
    -l, --link             display only the answer link.
    -r, --raw              make raw output (not colorized).
    -V, --version          Prints version information

OPTIONS:
    -e, --engine <engine>                    select middle search engine, currently support `bing`, `google`,
                                             `duckduckgo`, `stackoverflow`. [env: HORS_ENGINE=bing]  [default:
                                             duckduckgo]
    -n, --number-answers <number-answers>    number of answers to return. [default: 1]
    -p, --paging <paging>                    specify how to page output, can be `auto`, `never` [default: auto]

Usage example

1. Want to know how to export pandas dataframe to csv?

hors pandas dataframe to csv

Here it is:

- Answer from https://stackoverflow.com/questions/16923281/pandas-writing-dataframe-to-csv-file
df.to_csv(file_name, sep='\t')

2. If we just want to know where is the answer existed?

hors pandas dataframe to csv -l

Here it is:

Title - pandas writing dataframe to csv file
https://stackoverflow.com/questions/16923281/pandas-writing-dataframe-to-csv-file

3. If we want more about the answer detailed?

hors how to parse json in rust -a

Here it is:

- Answer from https://stackoverflow.com/questions/30292752/how-do-i-parse-a-json-file

Solved by the many helpful members of the Rust community:

extern crate rustc_serialize;
use rustc_serialize::json::Json;
use std::fs::File;
use std::io::Read;

fn main() {
    let mut file = File::open("text.json").unwrap();
    let mut data = String::new();
    file.read_to_string(&mut data).unwrap();

    let json = Json::from_str(&data).unwrap();
    println!("{}", json.find_path(&["Address", "Street"]).unwrap());
}

4. How to get more than one answers

hors set git remote url -n 2 -a

Here it is:

- Answer from https://stackoverflow.com/questions/2432764/how-to-change-the-uri-url-for-a-remote-git-repository
You can

git remote set-url origin new.git.url/here

(see git help remote) or you can just edit .git/config and change the URLs there. You're not in any danger of losing history unless you do something very silly (and if you're worried, just make a copy of your repo, since your repo is your history.)


^_^ ==================================================== ^_^

- Answer from https://stackoverflow.com/questions/42830557/git-remote-add-origin-vs-remote-set-url-origin
below is used to a add a new remote:

git remote add origin git@github.com:User/UserRepo.git

below is used to change the url of an existing remote repository:

git remote set-url origin git@github.com:User/UserRepo.git

below will push your code to the master branch of the remote repository defined with origin and -u let you point your current local branch to the remote master branch:

git push -u origin master

Documentation

5. The default search engine is bing, how can I use other search engine?

hors set git remote url -n 2 -a -e "google"

Proxy support

If the network seems blocked, you can try to configure proxy like this:

export http_proxy=http://127.0.0.1:1087;export https_proxy=http://127.0.0.1:1087;

Of course, it should be a valid proxy in your machine.

Paging feature on windows

Hors is using less command to make paging feature work, and it's not installed on Windows by default. You can use scoop to install less

scoop install less

Or use choco:

choco install less

Use hors as lib

Hors can be used as a lib, here is an example:

use std::str::FromStr;
use hors::{self, SearchEngine};

let search_engine: SearchEngine = SearchEngine::from_str("bing").unwrap();
let target_links: Vec<String> = hors::search_links(
    "how to parse json in rust",
    search_engine,
)
.await
.unwrap();
assert_ne!(target_links.len(), 0);
for link in target_links {
    assert!(link.contains("stackoverflow.com"));
}

For more information, please check the documentation

Special thanks

Very thanks for the awesome project and links :)

• howdoi inspires hors (Fow now hors is howdoi which implements in rust).
• stackoverflow helps users solve questions about coding.

About the name

hors is the abbreviation of howdoi in rust.