webstrand
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| type Octet = | |
| | `${0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}` | |
| | `${1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}${0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}` | |
| | `1${0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}${0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}` | |
| | `2${0 | 1 | 2 | 3 | 4 }${0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9}` | |
| | `2${5 }${0 | 1 | 2 | 3 | 4 | 5}` | |
| type Protocol = 'tcp' | 'tcps'; | |
| type QuasiIPv4 = `${bigint}.${bigint}.${bigint}.${bigint}` | |
| type QuasiBindingString = `${Protocol}://${'*' | QuasiIPv4}:${bigint}` | `${'ipc' | 'ipcs'}://${string}`; |
webstrand
/ object-path.ts
Last active
April 6, 2021 13:04
Recursively generate all of the paths, like "x.z.a.b.c" inside of an object. Includes bounded recursion variant
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| // HIGHLY inefficient, since it generates the entire union ahead of time | |
| // https://gist.github.com/webstrand/5a5df9e63d5646f045a8871f11cb5b6f#file-generic-validator-object-paths-ts | |
| // is far more efficient, though it only works inside of a function to _validate_ | |
| // paths provided by the user at the callsite. | |
| interface I { | |
| x: { | |
| z?: { | |
| a?: { | |
| b?: { |
webstrand
/ sel_iterate.py
Created
April 16, 2021 15:12
Sublime Text 3 Plugin for iterating through selected regions
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| import sublime | |
| import sublime_plugin | |
| import weakref | |
| from weakref import WeakValueDictionary | |
| view_selection_iterators = WeakValueDictionary() | |
| class ViewSelectionIterator(sublime_plugin.ViewEventListener): | |
| current_item = None |
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| type U2T< | |
| U, | |
| UF extends () => U = U extends U ? () => U : never, | |
| IF = (UF extends UF ? (x: UF) => any : never) extends (x: infer IF) => any ? IF : never | |
| > = | |
| IF extends () => infer W ? [...U2T<Exclude<U, W>>, W] : []; |
webstrand
/ newpgroup.c
Last active
July 11, 2021 17:54
Run the command in a new process group and forward any signals to the new process group leader.
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| #!/usr/bin/env scriptisto | |
| // scriptisto-begin | |
| // script_src: main.c | |
| // build_cmd: gcc -O2 -Wall -Werror main.c -o ./script | |
| // scriptisto-end | |
| #define _GNU_SOURCE 1 | |
| #include <stdlib.h> |
webstrand
/ object_id_64.sql
Last active
July 18, 2021 21:46
Generate a int64/bigint unique id using 41 bits of timestamp and 10 bits of sequence.
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| # https://instagram-engineering.com/sharding-ids-at-instagram-1cf5a71e5a5c | |
| CREATE SEQUENCE IF NOT EXISTS object_id_seq AS smallint | |
| MINVALUE 0 | |
| MAXVALUE 1023 | |
| CYCLE; | |
| CREATE OR REPLACE FUNCTION object_id_epoch() | |
| RETURNS bigint | |
| LANGUAGE sql |
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| #!/usr/bin/env perl | |
| use utf8; | |
| use strict; | |
| use warnings; | |
| use v5.26; | |
| use experimental 'signatures'; | |
| use AnyEvent::I3 qw(TYPE_GET_WORKSPACES TYPE_COMMAND i3); | |
| my $i3 = i3(); |
webstrand
/ any-abort-signal.ts
Created
September 21, 2021 13:41
Compose multiple AbortSignals together, so that the output signal is aborted if any of the input signals abort.
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| function anySignal(...signals: (AbortSignal | undefined | null)[]): AbortController { | |
| const controller = new AbortController(); | |
| for(const signal of signals) { | |
| if(signal == null) continue; | |
| if(signal.aborted) { | |
| handleAbort(); | |
| break; | |
| } | |
| signal.addEventListener("abort", handleAbort); |
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| export type Split<T extends string, Acc extends string[] = [], Alt extends string = never> = | |
| T extends `${infer U}${infer V}` | |
| ? {} extends Record<U, 0> | |
| ? Split<V, U extends `${number | bigint}` ? [...Acc, string] : Acc, string> | |
| : Split<V, [...Acc, U | Alt], Alt> | |
| : T extends "" | |
| ? [Alt] extends [never] | |
| ? Acc | |
| : [...Acc, ...(Alt | undefined)[]] | |
| : T extends `${number | bigint}` // `${number | bigint}` is at least 1 character |
webstrand
/ flatten-unflatten.ts
Last active
October 25, 2021 17:59
Flatten or unflatten object types `{ "a.b.c": 1 }` to `{ a: { b: { c: 1 } } }`
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| type Expand<T> = T extends T ? { [P in keyof T]: T[P] } : never; | |
| type UnionToIntersection<U> = (U extends U ? ((x: U) => any) : never) extends (x: infer I) => any ? I : never; | |
| type Flatten<T, Z extends string = ""> = T extends object | |
| ? Expand<UnionToIntersection<{ | |
| [P in keyof T]: P extends string | number | |
| ? T[P] extends object | |
| ? Flatten<T[P], `${Z}${P}.`> | |
| : { [Q in `${Z}${P}`]: T[P] } | |
| : never | |
| }[keyof T & (T extends readonly unknown[] ? number : unknown)]>> |