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replace(l:List|Vector,i1:ZZ,…,in:ZZ,x)

replace({l1,...,li,...,lm},i,x)={l1,...,li-1,x,li+1,...,lm}

replace({l1,...,li1 ,...,lm},i1,...,in,x)={l1,...,li-1,replace(li1 ,i2,...,in,x),li1+1,...,lm}







replace(l:List|Vector,i1:List | Vector | Range,…,in:List | Vector | Range,x)

if r:Range then replace(l,i1,...,r,...,in,x)=replace(l,i1,...,[r],...,in,x)





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