Apua Juan apua

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Seeking next epic moment

apua / merge_sorted_linkedlist.py

Created January 26, 2022 04:06

LeetCode "21. Merge Two Sorted Lists"

	"""
	>>> to_maybe_list = lambda x: [] if x is None else list(n.val for n in x)

	>>> m = lambda a,b: to_maybe_list(merge(*map(ListNode.from_iter, (a, b))))
	>>> assert(m([], []) == [])
	>>> assert(m([], [0]) == [0])
	>>> assert(m([0], []) == [0])
	>>> assert(m([1,2,4], [1,3,4]) == [1,1,2,3,4,4])
	>>> assert(m([1,2,5], [2,3,4]) == [1,2,2,3,4,5])
	>>> assert(m([2,3,4], [1,2,5]) == [1,2,2,3,4,5])

apua / to_dyn.diff

Last active October 12, 2021 01:18

Convert zdict trait from static to dynamic

	commit f67d8e7e8509c38b3b92bc1fa37773250c46ebe3
	Author: Apua
	Date: Tue Oct 12 08:21:37 2021 +0800

	Convert to trait object

	To make possible dict as a variable, its type has to be "trait object".

	A trait object has to be object safe, causes changes of the interface:

apua / 1_plain.rs

Last active September 30, 2021 06:03

Code reuse and restriction by abstract class

	#[derive(Debug)] struct Dict { api: &'static str, name: &'static str }
	const YAHOO: Dict = Dict { name: "yahoo", api: "http://yahoo/{word}" };
	const URBAN: Dict = Dict { name: "urban", api: "http://urban/{word}" };

	fn get_url(dict: &Dict, word: &str) -> String {
	dict.api.replace("{word}", word)
	}

	type YahooSummary = &'static str;
	type YahooExplain = &'static str;

apua / mod_visibility.rs

Last active September 22, 2021 08:44

apua / generic.swift

Last active July 21, 2021 11:11

Syntax of generic code in Swift

	// Ref: Generics https://docs.swift.org/swift-book/LanguageGuide/Generics.html

	// `f` is "generic function", `T` is "generic type"
	func f<T> (x: T) {}

	// `T: SomeClass` is "type constraint"
	func f<T: SomeClass, U: SomeProtocol>(t: T, u: U) {}

	// "associated type"
	protocol Container {

apua / read_string.swift

Created July 20, 2021 12:44

Some notes of reading string from remote resource sync/async

	import Foundation

	let data = "Café\n".data(using: .utf8 /* String.Encoding.utf8 */)! // not documented
	let text = String(data: data, encoding: .utf8)
	let filepath = "test" // it must exist
	let fp = FileHandle(forWritingAtPath: filepath)!
	fp.write(data) // will be deprecated
	fp.write(contentsOf: data /* require DataProtocol */) // both ways write to file immediately

	let fmgr = FileManager.default

apua / pattern_matching.swift

Last active July 16, 2021 01:50

pattern matching in Swift

	// Ref: https://fuckingifcaseletsyntax.com

	let ONE = 1
	enum E { case A, B(Int), C(Int, String) }

	for v in 0...3 {
	switch v {
	case 0: print("0") // match value
	case ONE: print("ONE=\(ONE)") // match identifier
	case 1..<3: print("in [1,3)") // v ~= 1..<3

apua / list_nics.py

Created June 10, 2021 08:13

List Physical NICs on ESXi (as `esxcli network list` does)

	# :author: Apua
	# :ref: /bin/esxcli.py 6.5.0
	# :target: get results of :cmd:`esxcli network nic list` in Python
	#
	# Note:
	#
	# - This script must run on ESXi console.
	# - :lib:`vmware` is built-in on ESXi.
	# - :obj:`session` must live during communicating with ESXi;
	# and be set to `None` in order to disconnect.

apua / torshin.py

Created May 12, 2021 12:27

	from collections import UserString


	class Torshn(UserString):
	def eval(self, ops):
	s = self
	for op in ops:
	s = getattr(s, op)()
	return s

apua / index.html

Last active November 15, 2020 09:08

Compare creating array among "spread in array", "array.from", "array.push" (http://jsbench.github.io/#ba37252ff86abd08aa08ff1467cc9c7b) #jsbench #jsperf

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>Compare creating array among "spread in array", "array.from", "array.push"</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/benchmark/1.0.0/benchmark.min.js"></script>
	<script src="./suite.js"></script>
	</head>
	<body>
	<h1>Open the console to view the results</h1>