imxiaohui

#![allow(unused)]
fn main() {
use std::collections::HashSet;
let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();

// Can be seen as `a - b`.
for x in a.difference(&b) {
    println!("{}", x); // Print 1
}

rust-play

#![allow(unused)]
fn main() {
use std::collections::HashSet;
let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();

// Can be seen as `a - b`.
for x in a.difference(&b) {
    println!("{}", x); // Print 1
}

rust-play

use std::collections::{HashMap, HashSet};

fn build_graph(classes: Vec<Vec<String>>) -> Vec<HashSet<usize>> {
    let mut animal_to_classes = HashMap::new();
    let mut graph = vec![HashSet::new(); classes.len()];
    for (i, cls) in classes.iter().enumerate() {
        for animal in cls.iter() {
            let set = animal_to_classes.entry(animal).or_insert(HashSet::new());
            set.insert(i);
        }

WillKoehrsen

# selenium for web driving
import selenium
from selenium import webdriver

# time for pausing between navigation
import time

# Datetime for recording time of submission
import datetime

heroheman

General

Shortcut	Description
SPC f e d	Open Configuration
SPC f e R	Reload Configuration
SPC SPC	Search Emacs
SPC h SPC	Search Spacemacs Layer
SPC f s	Save Buffer
SPC q q	Quit Emacs w/ Prompt
SPC q Q	Quit Emacs w/o Prompt

justsml

Fetch API Examples

⚠️ 2019-2020: See more examples and updates on my article here!

https://danlevy.net/you-may-not-need-axios/

=====================================================

mbinna

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

jFransham

Achieving warp speed with Rust

Contents:

• Number one optimization tip: don't
• Never optimize blindly
• Don't bother optimizing one-time costs
• Improve your algorithms
• CPU architecture primer
• Keep as much as possible in cache
• Keep as much as possible in registers

jrmuizel

Crates ordered by the number of dependent crates that were newly added to crates.io since the begining of April

1. serde 39
2. clap 35
3. serde_json 34
4. serde_derive 34
5. libc 32
6. log 27
7. rand 25
8. lazy_static 25

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?