indexOf(source: text, pattern: text) 🡒 number, const pure function

Returns the index of the first occurrence of the pattern within the text, or −1, if no such occurrence is found.

source = "Hello World!"
show summary "" a1c3 with
  indexOf(source, "o")
  indexOf(source, "!")
  indexOf(source, "Z")

The index value returned by indexOf is frequently intended to be later consumed by the function substr.

See also

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