Powershell regex replace only first hit -

i'm trying use regular expression replace first character after single hit, while using powershell.

no matter how try, can't seem make work. here's i'm talking about:

code:

$info = 'ab/f/*zxcvbn/mtf/ ---'  $regex = [regex]'/*' $regex.replace($info,"/c",1)  $regex 

output:

/cab/f/*zxcvbn/mtf/ --- 

i'm trying replace /f in expression /c, fails every time.

i'm using /* since don't know character find after first / that's want replace in end of day.

i pretty sure pretty simple but, can see, i'm, not familiar enough regular expressions.

ok, rather comment guess i'll add answer. can use negative lookbehind make sure there no /'s before matching, match first one. also, noah stated * not wildcard, . is. match / plus 1 character not have / anywhere before in string:

"(?<!/.*)/." 

so in context code, this:

$info = 'ab/f/*zxcvbn/mtf/ ---' $regex = [regex]"(?<!/)/." $regex.replace($info,"/c",1) 

those lines output:

ab/c/*zxcvbn/mtf/ --- 

edit: regex broken down @ regex101: http://regex101.com/r/ti7on1/1