Essays Index

This page is a growing index to the Essays collection.
--Please enter comments and suggestions for improvement in Discussion, and perhaps via E-mail to Anger@MIT.Edu.
--If the format suits you, choose an editing section of interest and enter descriptions in alphabetical order, modified from the templates at the top of the file, with "div" brackets for the section.
--When fully populated, all sections must be merged for fruitful sortings. A stationary alphabetical index will be needed for jumping to desired initial-character regions.
--Level is a subjective evaluation of two aspects: language proficiency expected, and specific application acquaintance, each on a 0-5 scale. The two will be joined by a period (decimal point) for (slightly) easier memorability.
Thank you.

Templates

Level	Title (link)	Source	Applications	Tools	Categories
1.0	one title	source	topic	op	cat
0.1	main title	source	topic	op	cat
	alt title
1.5	one title	source [[1]]	main topic	op	cat
			alt topic

(2^-Ani

Scrolling sortable table

Level	Title (link)	Source	Applications	Tools	Categories
1.1	(2^67)-1	Roger Hui	Number theory	Primes	Factoring, Number theory, Prime Numbers
	Primality Tests
1.0	2^64	Roger Hui	Number theory	Power	Large numbers, Number theory
1.1	235 Problem	Devon McCormick	Number theory	Prime factors	Factoring, Literate, Combinations, Cryptography
1.2	3n + 1 Problem	Roger Hui	Number theory	Tie	Factoring, Number theory, Sequences
	Collatz Conjecture
1.2	4 Queens Problem	Roger Hui	Chess	for.	Games, Chess
1.2	5-smooth number	Roger Hui	Number theory	NaturalLog	Factoring, Sequences
	Hamming Number
	Regular number
1.2	9 Queens Problem	Roger Hui	Chess	Hook	Games, Chess, Combinations
1.1	88 Hats	Andrew Nikitin et al.	Numerical puzzle	Residue	Puzzles, Chess
1.0	99 Bottles of Beer	Roger Hui	Recursion	Drop	Recursion, Games
0.0	1729	Roger Hui	Number theory	Primes	Factoring, Number theory
	Unforgettable Numbers
2.0	A Fine Line	Dan Bron	Pos/Neg ranks	Rank	Syntax, Language concepts
1.1	Absolute and Relative Tolerance	Oleg Kobchenko	Accuracy	Fix	Correctness
2.2	Ackermann's Function	Roger Hui	Ackermann function	Tie	Computability, Discrete Mathematics
3.2	Advent Of Code 2015	Eric Wastl	25 Problem solutions	NuVoc	Exercises
2.2	All Partitions	Howard Peelle	Number theory	FunctionPower	Partitioning, Number theory
2.3	Anagram	Oleg Kobchenko	Permutations	Anagram	Ordering, Permutationing, Syntax
1.3	Animals Game	Raul_Miller et al.	Artificial intelligence	Box	Games, Decision tree
1.2	N Queens Problem	Roger Hui	Chess	for.	Games, Chess [Move to alphabetical order]

Advent of Code 2015

Scrolling sortable table

Level	Title (link)	Source	Applications	Tools	Categories
0.0	Count Parentheses	Eric Wastl	Serial application	Insert	Exercises
0.0	Wrapping Paper	Eric Wastl	Sums of products	Infix	Exercises
1.0	Package Delivery	Eric Wastl	2-dimensional grid walks	Insert	Exercises
2.4	MD5	Eric Wastl	Logical operations	Boolean	Exercises
2.1	Find Nice Strings	Eric Wastl	String processing	Infix	Exercises
2.1	Light Control	Eric Wastl	Selection	Intervals	Exercises
3.1	Wiring Simulation	Eric Wastl	Recursion	SelfReference	Exercises
2.1	Counting Escaped Characters	Eric Wastl	Selection	FindMatches, SeqMachine	Exercises
2.2	Traveling Salesman	Eric Wastl	Enumeration	Anagram	Exercises
2.2	Look And Say	Eric Wastl	Value discontinuities	ShiftRight1	Exercises
3.2	Password Update	Eric Wastl	String processing	FunctionPower	Exercises
2.2	JSON Parsing	Eric Wastl	String search	Intervals	Exercises
2.2	Cyclic Permutations	Eric Wastl	Permutation optimization	Anagram	Exercises
1.1	Reindeer Speed	Eric Wastl	Number conversion	Antibase	Exercises
1.2	Cookie Recipes	Eric Wastl	Discrete optimization	whilst.	Exercises
3.2	Database Search	Eric Wastl	Boxed arrays	Fetch	Exercises
2.2	Integer Knapsack	Eric Wastl	Packing optimization	Intervals	Exercises
2.1	Game Of Life	Eric Wastl	Sub-array processing	Infix	Exercises
1.1	String Replacement	Eric Wastl	String manipulation	Intervals	Exercises
3.1	Package Delivery/Divisors	Eric Wastl	Variable repetition	while.	Exercises
1.4	RPG Simulation I	Eric Wastl	Multi-variable optimization	Insert	Exercises
2.3	RPG Simulation II	Eric Wastl	Table updates	Table, From	Exercises
2.3	Divide The Weights	Eric Wastl	Multi-variable optimization	Insert	Exercises
2.2	Cantor's Password	Eric Wastl	Modular arithmetic	Residue	Exercises

Bas-Chr

Scrolling sortable table

Level	Title (link)	Source	Applications	Tools	Categories
0.0	APL Acknowledge- ments	User's Manual	Roots of APL		History
0.0	APL Chronology	IBM J. of Res. & Dev., Vol. 17, No. 4, July 1973	Implementation of APL		History
0.0	APL Origins	Eugene_McDonnell	Naming of APL		History
4.4	RNG	Roger Hui	Random number generation	Roll	History
0.0	APL's Birthday	Roger Hui	Trivia		History
0.0	APL Developers Photo	Roger Hui	Trivia		History
1.0	Aspects of J	Art Anger	Idiosyncrasies of coding		Syntax, J Programming, Language concepts
0.0	Atoms	Roger Hui, Henry Rich	Terminologies for scalar nouns		Syntax, Language concepts
1.1	Attribute-Value Processing	Roger Hui	Selecting text items by prefix	Cut	Selection, System programming and style
1.2	Base Spectrum	Oleg Kobchenko	Depicting digit patterns	Base Two Base	Graphics, Sequences
3.3	Bernoulli Numbers	Roger Hui	Numerical analysis	Out Of	Recurrence relations, Factoring
3.2	Bernstein Polynomials	Oleg Kobchenko	Numerical analysis	Out Of	Sequences, Decision tree, Bézier curves
2.1	Beta Function	Roger Hui	Numerical analysis	Out Of	Recurrence relations, Language concepts
0.0	Bibliography	Roger Hui	Exhaustive chronological bibliography of APL & J to 2018		History, APL
3.3	Bifactorial	Oleg Kobchenko	Numerical analysis {needs attachment links}	Out Of	Random selections, Combinations
0.1	Binary GCD Algorithm	Roger Hui	Numerical analysis	Halve	Efficient GCD computation, Sequences, Number theory
2.1	Binary Probability	Oleg Kobchenko	Probability	Or, And	Combining probabilities, Statistics, Algorithms
2.1	Birthday Problem	Roger Hui	Probability	Out Of	Coincidence probabilities, Problems
2.1	Bisection Method	Roger Hui	Numerical analysis	Power Of	Root finding, Sequences
3.2	Bitwise Functions on Characters	Roger Hui	Numerical analysis	Bitwise Shift	Bit functions on bytes, Syntax
2.1	Bisection Method	Roger Hui	Numerical analysis	Power Of	Root finding, Sequences
4.3	Block Matrix Inverse	Roger Hui	Matrix inversion	Power Of	Inverting partitioned matrix, Matrices, Linear algebra
1.0	Boolean Array Size	Roger Hui	Boolean_algebra	Foreign	Efficient computation, Matrices
1.0	Boxed Array Display	Roger Hui		Atop, Append	Customizing display options, Combinations, Programming Style
0.0	Brevity	User:Dan Bron	Wisdom		Universal advice on expression, Miscellaneous
Needs more content!

Chu-Dua

Scrolling sortable table

Level	Title (link)	Source	Applications	Tools	Categories
0.0	Please	add	content	!