Module string_ops 

String processing utilities for scientific computing

This module provides common string distance metrics, similarity measures, tokenization, n-gram generation, and case conversion utilities used across the SciRS2 ecosystem.

Distance Metrics

• levenshtein_distance - Edit distance (insertions, deletions, substitutions)
• hamming_distance - Number of positions where characters differ
• jaro_similarity / jaro_winkler_similarity - Positional character similarity

Subsequences

• longest_common_subsequence - LCS length
• lcs_string - Actual LCS string

Tokenization & N-grams

• tokenize_whitespace - Split by whitespace
• tokenize_pattern - Split by custom delimiter patterns
• ngrams / char_ngrams - Word-level and character-level n-grams

Case Conversions

• to_snake_case / to_camel_case / to_pascal_case / to_kebab_case / to_screaming_snake_case

Functions

center

Center a string within a given width.

char_ngrams

Generate character-level n-grams from a string.

count_occurrences

Count occurrences of a substring.

dice_coefficient

Compute the Dice coefficient (bigram overlap) between two strings.

hamming_distance

Compute the Hamming distance between two strings of equal length.

is_palindrome

Check if a string is a palindrome (case-insensitive, alphanumeric only).

jaro_similarity

Compute the Jaro similarity between two strings.

jaro_winkler_similarity

Compute the Jaro-Winkler similarity between two strings.

lcs_similarity

Compute the LCS similarity (0.0 = no common subsequence, 1.0 = identical).

lcs_string

Return the actual longest common subsequence string.

levenshtein_distance

Compute the Levenshtein edit distance between two strings.

levenshtein_similarity

Compute the Levenshtein similarity (1.0 = identical, 0.0 = completely different).

longest_common_subsequence

Compute the length of the longest common subsequence (LCS) of two strings.

ngrams

Generate word-level n-grams from a list of tokens.

normalized_levenshtein

Compute the normalized Levenshtein distance (0.0 = identical, 1.0 = completely different).

pad_left

Pad a string on the left to a given width.

pad_right

Pad a string on the right to a given width.

reverse

Reverse a string (Unicode-aware).

skip_bigrams

Generate skip-grams (n-grams with gaps).

to_camel_case

Convert a string to camelCase.

to_kebab_case

Convert a string to kebab-case.

to_pascal_case

Convert a string to PascalCase.

to_screaming_snake_case

Convert a string to SCREAMING_SNAKE_CASE.

to_snake_case

Convert a string to snake_case.

to_title_case

Convert a string to Title Case.

tokenize_char

Tokenize a string by splitting on a delimiter character.

tokenize_pattern

Tokenize by splitting on a string pattern.

tokenize_predicate

Tokenize by splitting on any character matching a predicate.

tokenize_sentences

Tokenize into sentences (split on ‘.’, ‘!’, ‘?’).

tokenize_whitespace

Tokenize a string by splitting on whitespace.

tokenize_words

Simple word tokenizer that splits on non-alphanumeric characters.