Coldfusion: performing a replace on a portion of a string

Posted on 2007-07-19
Medium Priority
Last Modified: 2013-12-24
How in coldfusion would one do the following?

I have a large string and I want to replace each occurance of "<" with "{" and each occurance of ">" with "}". Now the thing is this, i do not want to perform this basic replace function on the entire string but rather on a portion of it. I only want to perform this replace function between index x and index y of the string. What is the best way to go about this?? Many thanks.
Question by:paddycobbett
  • 2
LVL 24

Expert Comment

ID: 19526616
string2 = left(string, x) & ReplaceList(mid(string,x+1, len(string)-y), "<,>", "{,}") & mid(string, y+1, len(string)-y+1)


Author Comment

ID: 19526936
You seem to be the on the right track. The value I supply for x works perfectly, but the y value does not work as expected. y is the index at which the replace should stop peforming. To use this rather silly example:

<cfset x=4 />
<cfset y=8 />
<cfset string="<><><><><><><>" />
<cfset string2 = left(string, x) & ReplaceList(mid(string,x+1, len(string)-y), "<,>", "{,}") & mid(string, y+1, len(string)-y+1)/>

Produces the output:


When given the x value of 4 and y value of 8 I would have expected:


Another example, with the same string but x=2 and y=6 the above code returns:


when i'd expect:


In both cases the code correctly starts replacing at the specified x index, but the y index isn't performing as expected. Can you see at a glance how to correct the algorithm? Many thanks for your efforts! =)
LVL 14

Accepted Solution

Scott Bennett earned 2000 total points
ID: 19527373
<cfset x=4 />
<cfset y=8 />
<cfset string="<><><><><><><>" />
<cfset string2 = left(string, x) & ReplaceList(mid(string,x+1, y-x), "<,>", "{,}") & right(string, len(string)-y)/>

Author Comment

ID: 19527485
That did the trick, thanks alot!

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