assembly - Copy values from original array into a new one -

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recently i'm learning assembly language , using arm assembler keil tool. , came across problems online. requires code copy values sourcearray(listed below) , writes destination array while removing duplicates. not understand quite clear how copy array? hope can help.. edit: while i'm asking i'm trying figure out on own, appreciate giving me example. and, not assignment. it's pure self-study. 

sram_base   equ     0x40000000; start of address              area    reset, code, readonly             entry      stop        b       stop  sourcearray       dcb   2,44,66,66,1,1,4,10,3,10,23,1,23,255,254,2,2,3 asize             dcb   (asize-sourcearray)           end


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