The built-in string functions are much more significant and interesting than the numeric functions. Because awk is essentially designed as a string-processing language, a lot of its power derives from these functions. Table 9.2 lists the string functions found in awk.
Globally substitutes s for each match of the regular expression r in the string t. Returns the number of substitutions. If t is not supplied, defaults to $0.
Returns position of substring t in string s or zero if not present.
Returns length of string s or length of $0 if no string is supplied.
Returns either the position in s where the regular expression r begins, or 0 if no occurrences are found. Sets the values of RSTART and RLENGTH.
Parses string s into elements of array a using field separator sep; returns number of elements. If sep is not supplied, FS is used. Array splitting works the same way as field splitting.
Uses printf format specification for expr.
Substitutes s for first match of the regular expression r in the string t. Returns 1 if successful; 0 otherwise. If t is not supplied, defaults to $0.
Returns substring of string s at beginning position p up to a maximum length of n. If n is not supplied, the rest of the string from p is used.
Translates all uppercase characters in string s to lowercase and returns the new ...