guidoschmidt

# Zig Programming Cheat Sheet

This guide condenses the key ideas from Chapter 1 of the Zig book, emphasizing Zig's syntax, semantics, workflows, and philosophy. It distills nuanced language details, technical rules, compiler constraints, and examples for direct application by AI or technical users.

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## 1. Zig Philosophy and Paradigm

- Zig is a **low-level, general-purpose, modern programming language** designed for safety, control, and simplicity.
- Major design goal: **Less is more** (removes confusing/unsafe C/C++ behaviors; adds consistency).

guidoschmidt

// To run:
//   clang core-audio-sine-wave.c -framework AudioUnit && ./a.out
#include <AudioUnit/AudioUnit.h>

#define SAMPLE_RATE 48000
#define TONE_FREQUENCY 440
#define M_TAU 2.0 * M_PI

OSStatus RenderSineWave(
        void *inRefCon,

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const std = @import("std");

pub fn main() void {
    std.log.info("mutable closure:",.{});
    runMutDemo();

    std.log.info("const closure:",.{});
    runConstDemo();
}

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IRC Reference

Not intended as a guide for newbies, more like a "cheat sheet" for the somewhat experienced IRC user, especially one who wields some power over a channel.

The Basics

• /join #channel
  • Joins the specified channel.
• /part #channel
• Leaves the specified channel.

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/* You can aslo add */
canvas {
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    -ms-interpolation-mode: nearest-neighbor;
}

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// Modified version of ECSY's ObjectPool, see here:
// https://github.com/ecsyjs/ecsy/blob/dev/src/ObjectPool.js

const ret = (e) => e;
const und = () => undefined;

export default class ObjectPool {
  static isObjectPool = true;

  constructor(opt = {}) {

guidoschmidt

import requests
import os
import ipfsapi
import concurrent.futures

api = ipfsapi.Client(host='https://ipfs.infura.io', port=5001)

url = "https://better-call.dev/v1/contract/mainnet/KT1RJ6PbjHpwc3M5rw5s2Nbmefwbuwbdxton/tokens"

r = requests.get(url)

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# linux send h264 rtp stream:
gst-launch-1.0 -v ximagesrc ! video/x-raw,framerate=20/1 ! videoscale ! videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! rtph264pay ! udpsink host=127.0.0.1 port=5000

# Macos send h264 rtp stream:
gst-launch-1.0 -v avfvideosrc capture-screen=true ! video/x-raw,framerate=20/1 ! videoscale ! videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! rtph264pay ! udpsink host=127.0.0.1 port=5000

# receive h264 rtp stream:
gst-launch-1.0 -v udpsrc port=5000 caps = "application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! rtph264depay ! decodebin ! videoconvert ! autovideosink

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#ifndef __MATRIX_INCLUDED__
#define __MATRIX_INCLUDED__

#define IDENTITY_MATRIX float4x4(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)

float4x4 inverse(float4x4 m) {
    float n11 = m[0][0], n12 = m[1][0], n13 = m[2][0], n14 = m[3][0];
    float n21 = m[0][1], n22 = m[1][1], n23 = m[2][1], n24 = m[3][1];
    float n31 = m[0][2], n32 = m[1][2], n33 = m[2][2], n34 = m[3][2];
    float n41 = m[0][3], n42 = m[1][3], n43 = m[2][3], n44 = m[3][3];

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Most GStreamer examples found online are either for Linux or for gstreamer 0.10.

This particular release note seems to have covered important changes, such as:

• ffmpegcolorspace => videoconvert
• ffmpeg => libav

Applying -v will print out useful information. And most importantly the negotiation results.