[julia-users] How to find index in Array{AbstractString,1}

[paul analyst]

julia> suo2
340393-element Array{AbstractString,1}:
 "13e45fca6bc6506a08a4f804800"
 "13e45fca71f7500c8d1921e2400"
 "13e45fca98e7109ca6dfbca3400"
 ?
 "149132bb25349e90f26ebb0f800"
 "149132dfdfa3711feebb99f7c00"

julia> a=suo2[3]
"13e45fca98e7109ca6dfbca3400"


*julia> findin(suo2,a)0-element Array{Int64,1}*

*Whay 0-element* ?

julia> a
"13e45fca98e7109ca6dfbca3400"

*How to find index in Array{AbstractString,n}*
Paul