The STRJOIN function collapses a one-dimensional string array into a single merged string or two-dimensional string array into a one-dimensional array of merged strings. The strings in the removed first dimension are concatenated into a single string using the string in Delimiter to separate them.
Result = STRJOIN( String [, Delimiter] [, /SINGLE] )
Returns the merged strings.
A string array to be collapsed into merged strings.
The separator string to use between the joined strings. If Delimiter is not specified, an empty string is used.
If SINGLE is set, the entire String is joined into a single scalar string result.
Replace all the blanks in a sentence with colons:
str = 'Out, damned spot! Out I say!' print, (STRJOIN(STRSPLIT(str, /EXTRACT), ':'))
STRCMP, STREGEX, STRMATCH, STRMID, STRPOS, STRSPLIT