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Celebrating 20 years of building open source tools

Karsten Schmidt postspectacular

🎉
Celebrating 20 years of building open source tools
1.1k followers · 36 following
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@postspectacular
postspectacular / textcanvas-blitting.js
Last active Jul 9, 2022
Tiny ASCII art demo for https://thi.ng/text-canvas showing how to compose an overlay image with transparency mask with another text canvas...
View textcanvas-blitting.js
import { SYSTEM } from "@thi.ng/random";
import { blitMask, canvas, canvasFromText, formatCanvas, hline } from "@thi.ng/text-canvas";
// overlay text canvas
const logo = canvasFromText([
"########### #### #### # #######",
"######### ░░░ ## ░░░ ## ░░░ ░░░░░░ ░░░░░░ ######",
"######## ░░░░░░░░░ ░░░░░░░░░ ░░░░░░░░░ ░░░░ ░░░░ #######",
"####### ░▒▒░ ░▒▒░ ░▒▒░ ░▒▒░ ░▒▒░ ░▒▒░ ░▒▒░ ░▒▒░ #######",
"####### ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ ▒▓▓▒ #######",
@postspectacular
postspectacular / pack-intervals-example.js
Last active Jul 22, 2022
Interval-based compression (using thi.ng/bitstream). Finds and compresses sub-ranges of successive values in an array of monotonically increasing integer values in [0..n] interval.
View pack-intervals-example.js
import { equiv } from "@thi.ng/equiv";
import { encode, decode } from "./pack-intervals.js";
// example source array (will be compressed into just 7 bytes)
const src = [
1, 2, 3, 4,
6, 7,
9, 10, 11, 12, 13, 14,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
];
@postspectacular
postspectacular / lottery.js
Last active Jun 2, 2022
Lottery script for picking a number of weighted random addresses of FXHash token holders, import from a number of CSV files. These CSV files are per-project and each have the format: `address, numTokens`. Furthermore, the weight of the projects can be adjusted via the `PROJECT_WEIGHTS` object...
View lottery.js
import { float, parseCSVSimpleFromString } from "@thi.ng/csv";
import { readText } from "@thi.ng/file-io";
import { weightedRandomKey } from "@thi.ng/random";
import {
assocObj,
keys,
map,
normFrequenciesAuto,
repeatedly,
transduce,
@postspectacular
postspectacular / tzprofile.txt
Created Nov 20, 2021
tzprofiles verify
View tzprofile.txt
I am attesting that this GitHub handle postspectacular is linked to the Tezos account tz1d4ThofujwwaWvxDQHF7VyJfaeR2ay3jhf for tzprofiles
sig:edsigtzC6ZGMWGVC7jWZBBe26iNdewHxc9oxJFq4b2mXo3nzovaoDW5b3V9wP6rVaQfDLVT7TS3vdBQiqMZaqsyxAbqDH1onUPP
@postspectacular
postspectacular / search.json
Created Jun 14, 2020
thi.ng/umbrella search index (2020-06-14) for use w/ https://github.com/thi-ng/umbrella/tree/feature/hdom2020/examples/hdom2020-search-docs
View search.json
[["adapt-dpi/src/index.ts","adjacency/src/bfs.ts","adjacency/src/binary.ts","adjacency/src/dfs.ts","adjacency/src/disjoint-set.ts","adjacency/src/mst.ts","adjacency/src/sparse.ts","api/src/api/assoc.ts","api/src/api/bind.ts","api/src/api/buffered.ts","api/src/api/clear.ts","api/src/api/compare.ts","api/src/api/contains.ts","api/src/api/copy.ts","api/src/api/deref.ts","api/src/api/dissoc.ts","api/src/api/enable.ts","api/src/api/equiv.ts","api/src/api/event.ts","api/src/api/fn.ts","api/src/api/get.ts","api/src/api/hash.ts","api/src/api/id.ts","api/src/api/indexed.ts","api/src/api/into.ts","api/src/api/keyval.ts","api/src/api/length.ts","api/src/api/meta.ts","api/src/api/object.ts","api/src/api/path.ts","api/src/api/predicate.ts","api/src/api/range.ts","api/src/api/release.ts","api/src/api/reset.ts","api/src/api/seq.ts","api/src/api/set.ts","api/src/api/stack.ts","api/src/api/tuple.ts","api/src/api/typedarray.ts","api/src/api/watch.ts","api/src/assert.ts","api/src/constants.ts","api/src/decorators/configurable.t
@postspectacular
postspectacular / 00-sigmoid-approx.ts
Last active Nov 2, 2019
Sigmoid versions (AssemblyScript)
View 00-sigmoid-approx.ts
// uses Math.exp() approximation from:
// https://www.musicdsp.org/en/latest/Other/222-fast-exp-approximations.html
// @ts-ignore: decorator
@inline
function fastexp9(x: f64): f64 {
// prettier-ignore
return (362880+x*(362880+x*(181440+x*(60480+x*(15120+x*(3024+x*(504+x*(72+x*(9+x)))))))))*2.75573192e-6;
}
@postspectacular
postspectacular / accessors.ts
Last active Oct 14, 2019
Super slow numeric property accessors - why is [0] / [1] access 110x slower than .x/.y?
View accessors.ts
import { bench } from "@thi.ng/bench";
import { map, range } from "@thi.ng/transducers";
export class Vec2 {
buf: Float32Array;
constructor(buf: ArrayBuffer, off: number) {
this.buf = new Float32Array(buf, off, 2);
}
@postspectacular
postspectacular / tokenizer.js
Created Sep 10, 2019
S-expr tokenizer
View tokenizer.js
function tokenizeSexpr(src) {
let curr = "";
const scopes = [[]];
const $word = () => {
if (curr) {
scopes[scopes.length - 1].push(curr);
curr = "";
}
};
for(let i = 0; i < src.length; i++) {
@postspectacular
postspectacular / petecory.ts
Last active Jul 29, 2019
https://demo.thi.ng/umbrella/geom-convex-hull/ (Refactored & simplified version of code from: http://www.petecorey.com/blog/2019/07/29/clipping-convex-hulls-with-thing/)
View petecory.ts
import {
area,
centroid,
clipConvex,
convexHull,
points,
polygon,
rect,
scatter,
withAttribs
@postspectacular
postspectacular / hello-ast.js
Last active Jun 14, 2019
@thi.ng/shader-ast WIP codegen example w/ multiple output targets (GLSL & JS)
View hello-ast.js
// // // //
// ///// // //// // //// ///// //// ///// //////
// // ///// // ///// // // // // ////// // // //
// //// // // ///// // // ////// // ///// //// //
// // // // // // // // // // // // // //
// ///// // // ///// ///// //// // ///// ///// ///
//
// Head over to thi.ng/shader-ast for more details
const ast = require("@thi.ng/shader-ast");