ErrLookup › TheAlgorithms/JavaScript

TheAlgorithms/JavaScript

Algorithms and Data Structures implemented in JavaScript for beginners, following best practices. · JavaScript · 380 source files

Analyzed at 5c39e87a9a on 2026-08-13. 162 documented errors.

Code / Message	Type	Severity	Tags
Grid must be a non-empty array	validation	error	backtracking, maze, grid, input-validation
Grid must be a square	validation	error	backtracking, maze, grid, dimension-validation
Grid must only contain 0s and 1s	validation	error	backtracking, maze, grid, type-coercion
Argument not an Integer	validation	error	bit-manipulation, type-validation, integer
Provided input is not an array	validation	error	bit-manipulation, power-set, type-validation, array
Error size should be less than equal to 32	validation	error	bit-manipulation, power-set, range-validation, performance
LFUCache ERROR: The Capacity is 0	validation	error	cache, lfu, capacity, input-validation
Invalid capacity	validation	error	cache, lru, capacity, constructor, type-validation
Capacity should be greater than 0	validation	error	cache, lru, capacity, range-validation
Rule must be an integer between the values 0 and 255 (got ${	validation	error	cellular-automata, rule-validation, type-validation, integer
Coefficient a, b should be number	validation	error	cipher, affine, type-validation, coefficient
Argument str should be String	validation	error	cipher, affine, type-validation, string
${a} is not coprime of 26	validation	error	cipher, affine, math, coprime, modular-inverse
Argument should be string	validation	error	cipher, atbash, type-validation, string
Arguments are invalid	validation	error	cipher, caesar, type-validation, range-validation
Both keyword and message must be specified	validation	error	cipher, keyword-shifted, input-validation, required-argument
Invalid keyword!	validation	error	cipher, keyword-shifted, input-validation, bug, duplicate-characters
Argument should be string	validation	error	cipher, rot13, type-validation, string
Arguments type are invalid	validation	error	cipher, xor, type-validation, integer
Only string arguments are allowed	validation	error	type-validation, string, base-conversion, typeof, conversions
Duplicate characters in character set are not allowed	validation	error	validation, base-conversion, unique-keys, charset, conversions
Not a valid character: ${digit}	validation	error	validation, base-conversion, charset, out-of-range, conversions
Argument is not a string type	validation	error	type-validation, string, hex, typeof, conversions
Argument is not a valid HEX code!	validation	error	validation, hex, regex, input-sanitization, conversions
Invalid hex string.	validation	error	validation, hex, regex, case-sensitivity, conversions
Invalid units	validation	error	validation, units, length, lookup, conversions
argument is not a Number	validation	error	type-validation, rgb, color, typeof, conversions
Argument is not a string.	validation	error	type-validation, string, time, typeof, conversions
Input is not a valid RGB color.	validation	error	validation, rgb, hsl, color, range-check, conversions
hue should be between 0 and 360	validation	error	validation, hsv, rgb, color, range-check, conversions
saturation should be between 0 and 1	validation	error	validation, hsv, rgb, color, range-check, conversions
value should be between 0 and 1	validation	error	validation, hsv, rgb, color, range-check, conversions
red should be between 0 and 255	validation	error	validation, rgb, hsv, color, range-check, conversions
green should be between 0 and 255	validation	error	validation, rgb, hsv, color, range-check, conversions
blue should be between 0 and 255	validation	error	validation, rgb, hsv, color, range-check, conversions
Index Out of Bound	validation	error	validation, range-check, index, quickselect, data-structures, off-by-one
Index is out of range max ${this.length}	exception	error	data-structures, linked-list, range-error, index-bounds, circular-list
Out of Range index	exception	error	data-structures, linked-list, range-error, index-bounds
Queue is Empty	exception	error	data-structures, queue, empty-state, fifo
Stack Underflow	exception	error	data-structures, stack, underflow, lifo
Cannot normalize vectors of length 0	exception	error	math, vector, divide-by-zero, geometry
Input should be integer	exception	error	dynamic-programming, fibonacci, type-error, integer-validation
Input should be integer	exception	error	dynamic-programming, fibonacci, type-error, integer-validation
Improper string encoding	exception	error	dynamic-programming, date-parsing, input-format, calendar
Triplet cannot exist with the given array	exception	error	dynamic-programming, array, input-size, product
The sum must be non-negative.	exception	error	dynamic-programming, subset-sum, validation, non-negative
All of the inputs of the array must be positive.	exception	error	dynamic-programming, subset-sum, validation, positive-integers
Input data must be type of Array	exception	error	dynamic-programming, grid, type-guard, input-shape
Minimum of 3 points is required to form closed polygon!	exception	error	geometry, convex-hull, input-size, polygon
Argument is NaN - Not a Number	exception	error	math, abs, type-error, nan, input-coercion
Input cannot be Negative	exception	error	math, aliquot-sum, type-error, negative-input
Input cannot be a Decimal	exception	error	math, aliquot-sum, type-error, integer-validation
Invalid Triangle sides.	exception	error	geometry, validation, triangle-inequality, input-validation
The ${paramName} should be type Number	exception	error	type-check, input-validation, numeric, typeof
The ${paramName} only accepts non-negative values	exception	error	validation, numeric, negative-value, geometry
Type of n must be number	exception	error	type-check, input-validation, numeric, automorphic
n cannot be a floating point number	exception	error	validation, integer, numeric, floating-point
Invalid Input	exception	error	type-check, array, input-validation, statistics
Array is empty	exception	warning	validation, empty-array, statistics, edge-case
Argument is not a number.	exception	error	type-check, input-validation, numeric, krishnamurthy
Invalid input, please pass only numbers	exception	error	type-check, input-validation, numeric, range
Invalid number range, please provide numbers such that num1	exception	warning	validation, range, ordering, numeric
Unsupported base. Must be in range [2, 10]	exception	error	range-error, numeric-base, input-validation, radix
Input is not a valid 2D matrix.	exception	error	validation, matrix, array, linear-algebra, input-validation
Square matrix is required.	exception	error	validation, matrix, square-matrix, linear-algebra
Invalid Input	exception	error	type-check, input-validation, numeric, taylor-series, nan
Not a Number	exception	error	type-check, input-validation, numeric, gcd, number-theory
Index out of range	exception	error	validation, array, index-out-of-bounds, recursion, off-by-one
Array is empty	exception	warning	validation, variadic, empty-input, array, edge-case
The two parameters must be distinct, non-null integers	exception	error	validation, number-theory, integer, input-validation, friendly-numbers
Arguments must be numbers	exception	error	type-check, input-validation, numeric, gcd, number-theory
Number must be greater than zero.	exception	error	math, input-validation, precondition, figurate-numbers
Input data must be numbers	exception	error	math, type-check, input-validation, base-conversion
Expected a valid real number	exception	error	math, input-validation, type-guard, number-theory
Number must be greater than zero.	exception	error	math, number-theory, precondition, prime-factorization
Number must be greater than zero.	exception	error	math, number-theory, precondition, prime-factorization
Index cannot be Negative	exception	error	math, precondition, index-validation, sequence
Index cannot be a Decimal	exception	error	math, precondition, type-validation, sequence
imageWidth should be greater than zero	exception	error	math, rendering, precondition, fractal
imageHeight should be greater than zero	exception	error	math, rendering, precondition, fractal
maxStep should be greater than zero	exception	error	math, rendering, precondition, fractal
Invalid Input	exception	error	math, statistics, type-check, input-validation
Argument must be an Array	exception	error	math, statistics, type-check, input-validation
The two lists must be of equal length	exception	error	math, statistics, input-validation, ml
Expected integer N and finite a, b	exception	error	math, calculus, type-validation, numerical-integration
Number must be greater than zero.	exception	error	math, number-theory, precondition, prime-factorization
Modulus must be initialized in the object constructor	exception	error	math, object-state, precondition, modular-arithmetic
Input must be Numbers	exception	error	math, type-check, input-validation, modular-arithmetic
Argument is not a number.	exception	error	math, type-check, input-validation, number-manipulation
Input is not a valid 2D matrix.	exception	error	math, linear-algebra, input-validation, matrix
Expected integer N and finite a, b	exception	error	math, calculus, type-validation, numerical-integration
Expected a number, received ${typeof num}	exception	error	type-validation, math, input-validation, newton-method
Expected a number, received ${typeof precision}	exception	error	type-validation, math, optional-parameter, default-parameter
Input data must be numbers	exception	error	type-validation, math, binary-search, nan-pitfall
The geometric progression is diverging, and its sum cannot b	exception	error	math, domain-validation, infinite-series, convergence
The ${noName} should be Number type	exception	error	type-validation, math, geometry, shared-helper
The ${noName} only accepts positive values	exception	error	range-validation, math, geometry, positive-value
Arguments are not all numbers.	exception	error	type-validation, date, calendar, zellers-congruence
Input must be a integer number	exception	error	type-validation, math, palindrome, misleading-message
The value of latitude or longitude should be a number	exception	error	type-validation, navigation, geo, haversine
No natural numbers exist below 1	exception	error	range-validation, project-euler, math, natural-number
Fibonacci sequence limit can't be less than 1	exception	error	range-validation, project-euler, math, fibonacci
Invalid Input	exception	error	range-validation, project-euler, primes, generic-message
Invalid input, please provide valid number	exception	error	input-validation, project-euler, parse-pitfall, loose-check
Please provide number greater that 1	exception	error	range-validation, project-euler, typo-message, boundary
Invalid Input	exception	error	range-validation, project-euler, amicable-numbers, generic-message
Dimension must be odd	exception	error	range-validation, project-euler, parity, spiral
Dimension must be positive	exception	error	range-validation, project-euler, positive-value, nan-pitfall
Invalid input	exception	error	range-validation, project-euler, primes, circular-primes
Invalid Input	exception	error	range-validation, project-euler, pentagonal-numbers, generic-message
Input should be a non-negative whole number	exception	error	range-validation, recursion, math, integer-only
location should point to a pixel within the rgbData	exception	error	bounds-check, image-processing, flood-fill, input-validation
canvasWidth should be greater than zero	exception	error	input-validation, geometry, canvas, positive-number
Invalid Input	exception	error	type-check, string, recursion, input-validation
Invalid Input	exception	error	type-check, array, dynamic-programming, input-validation
Invalid arguments	exception	error	bounds-check, search, quickselect, input-validation
key has to be a function or else left undefined	exception	error	type-check, union-find, constructor, input-validation
Index out of bounds. The maximum index can be length-1	exception	error	bounds-check, union-find, off-by-one, input-validation
Subarray size k must be between 1 and the length of the arra	exception	error	range-check, sliding-window, input-validation
Please input a valid list or array.	exception	error	type-check, sort, recursion, input-validation
Given input is not an array	exception	error	type-check, sort, input-validation
One of the items in your array is not a number	exception	error	type-check, sort, numeric, input-validation
Argument should be string	exception	error	type-check, string, palindrome, input-validation
Both arguments should be strings.	exception	error	type-check, string, anagram, input-validation
Argument is not a string.	exception	error	type-check, string, naming-convention, input-validation
Argument is not a string	exception	error	type-check, string, ascii, input-validation
Argument is not a string.	exception	error	type-check, string, naming-convention, input-validation
Argument is not a string.	exception	error	type-check, string, naming-convention, input-validation
The given value is not a string	exception	error	type-check, string, pangram, regex, input-validation
Argument is not a string.	exception	error	string, validation, type-guard, naming-convention
Argument is not a string.	exception	error	string, validation, type-guard, naming-convention
The first param should be a string	exception	error	string, validation, type-guard, word-count
The second param should be a boolean	exception	error	string, validation, type-guard, boolean, word-count
Input should be a string	exception	error	string, validation, type-guard, letter-count
Input must not contain special characters	exception	error	string, validation, regex, letter-count, ascii-only
Input must not contain numbers	exception	error	string, validation, regex, letter-count, ascii-only
Argument should be string	exception	error	string, validation, type-guard, substring, ambiguous-message
Input should be a string	exception	error	string, validation, type-guard, vowels
Argument should be string	exception	error	string, validation, type-guard, unique-character
Invalid phone number!	exception	error	string, validation, phone-number, formatting, coercion-bug
Strings must be of the same length	exception	error	string, validation, hamming-distance, length-mismatch
Input must be a string or a number	exception	error	string, validation, type-guard, palindrome, number
Invalid Input Type	exception	error	string, validation, type-guard, sliding-window, substring
Invalid Input Type	exception	error	string, validation, type-guard, lowercase, unicode-caveat
Argument should be a string	exception	error	string, validation, type-guard, max-character
The param should be a nonempty string	exception	error	string, validation, empty-input, max-character
the param should be string	exception	error	string, validation, type-guard, word-count, default-arg
Given input is not a string	exception	error	string, validation, type-guard, pattern-matching, ambiguous-message
Input data must be strings	validation	error	string, validation, type-guard, percentage, nan-risk
The arg must be a valid, non empty string	validation	error	string, validation, type-check, input-validation
The given value is not a string	validation	error	string, type-check, validation, input-validation
The given value is not a string	validation	error	string, type-check, validation, input-validation
Argument should be string	validation	error	string, type-check, validation, ascii
The given value is not a string	validation	error	string, validation, credit-card, type-check, input-validation
${creditCardString} is an invalid credit card number because	validation	error	string, validation, credit-card, sanitization, input-validation
${creditCardString} is an invalid credit card number because	validation	error	validation, credit-card, business-rule, input-validation
${creditCardString} is an invalid credit card number because	validation	error	validation, credit-card, business-rule, issuer-detection
${creditCardString} is an invalid credit card number because	validation	error	validation, credit-card, luhn, checksum, business-rule
Email Address String Null or Empty.	validation	warning	string, validation, email, type-check, input-validation
Invalid Month Number.	validation	error	date, validation, off-by-one, type-check, input-validation
Invalid day value.	validation	error	date, validation, business-rule, input-validation
Invalid date format. Please use 'dd/mm/yyyy'.	validation	error	date, validation, format, regex, input-validation