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Format: TuSort ( tuple, fieldname )

Purpose: Sort a tuple of tuples, i.e. an array of tuples. The parameter tuple is a tuple that contains only tuples. The parameter fieldname must be string. Every tuple element of tuple must have a field fieldname. These fields must be all of the same type, which is one of Integer, Real, or String.

Return Values: TuSort() returns always null. The tuple is changed directly.


input:resulting output:
t0 = emptytuple; t0.d=1;t0.a=2;t0.c=2;t0.b=3;
t1 = emptytuple; t1.d=4;t1.a=1;t1.c=5;t1.b=5;
t2 = emptytuple; t2.d=3;t2.a=5;t2.c=1;t2.b=4;
t3 = emptytuple; t3.d=5;t3.a=4;t3.c=4;t3.b=2;
t4 = emptytuple; t4.d=2;t4.a=3;t4.c=3;t4.b=1;
tup = emptytuple; 
tup.s0 = t0; tup.s1 = t1; tup.s2 = t2; 
tup.s3 = t3; tup.s4 = t4;>
before sort:<? tup>
<let r = TuSort (tup, "b")>
after sort: <? tup>
before sort:
s0=(d=1, a=2, c=2, b=3)
s1=(d=4, a=1, c=5, b=5)
s2=(d=3, a=5, c=1, b=4)
s3=(d=5, a=4, c=4, b=2)
s4=(d=2, a=3, c=3, b=1)
after sort:
s0=(d=2, a=3, c=3, b=1)
s1=(d=5, a=4, c=4, b=2)
s2=(d=1, a=2, c=2, b=3)
s3=(d=3, a=5, c=1, b=4)
s4=(d=4, a=1, c=5, b=5)

See Also: TuSearch(), TuSearchTuple().

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