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Fast module for counting the number of occurrences of a substring inside a string.
npm install quickly-count-substrings --save
const count = require('quickly-count-substrings')
const str = 'The quick brown fox jumps over the lazy dog'
count(str, 'o') // => 4
result = count(str, substr[, options])Returns number of occurrences of substr in str.
Arguments:
str - The string to search insubstr - The string to search foroptions - Optional. If {overlap: true}, overlapping substrings
will be counted (default: {overlap: false})Counting substrings in a 24MB string:
# quickly-count-substrings
ok ~44 ms (0 s + 43676071 ns)
# count-substring
ok ~134 ms (0 s + 133563148 ns)
# string-occurrence
ok ~184 ms (0 s + 183978927 ns)
# needle-string
ok ~116 ms (0 s + 115521420 ns)
# regex-occurrence
ok ~169 ms (0 s + 169180879 ns)
# count-strings
ok ~491 ms (0 s + 490783663 ns)
MIT
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