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