ECL
ECL is an actively used programming language created in 2000. ECL is a declarative, data centric programming language designed in 2000 to allow a team of programmers to process big data across a high performance computing cluster without the programmer being involved in many of the lower level, imperative decisions.. Read more on Wikipedia...
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- ECL ranks in the top 10% of languages
- the ECL website
- the ECL wikipedia page
- ECL first appeared in 2000
- file extensions for ECL include ecl and eclxml
- See also: linux, prolog, pascal, sql, clarion
- Have a question about ECL not answered here? Email me and let me know how I can help.
Example code from Linguist:
/* * Multi-line comment */ #option ('slidingJoins', true); namesRecord := RECORD string20 surname; string10 forename; integer2 age; integer2 dadAge; integer2 mumAge; END; namesRecord2 := record string10 extra; namesRecord; end; namesTable := dataset('x',namesRecord,FLAT); namesTable2 := dataset('y',namesRecord2,FLAT); integer2 aveAgeL(namesRecord l) := (l.dadAge+l.mumAge)/2; integer2 aveAgeR(namesRecord2 r) := (r.dadAge+r.mumAge)/2; // Standard join on a function of left and right output(join(namesTable, namesTable2, aveAgeL(left) = aveAgeR(right))); //Several simple examples of sliding join syntax output(join(namesTable, namesTable2, left.age >= right.age - 10 and left.age <= right.age +10)); output(join(namesTable, namesTable2, left.age between right.age - 10 and right.age +10)); output(join(namesTable, namesTable2, left.age between right.age + 10 and right.age +30)); output(join(namesTable, namesTable2, left.age between (right.age + 20) - 10 and (right.age +20) + 10)); output(join(namesTable, namesTable2, aveAgeL(left) between aveAgeR(right)+10 and aveAgeR(right)+40)); //Same, but on strings. Also includes age to ensure sort is done by non-sliding before sliding. output(join(namesTable, namesTable2, left.surname between right.surname[1..10]+'AAAAAAAAAA' and right.surname[1..10]+'ZZZZZZZZZZ' and left.age=right.age)); output(join(namesTable, namesTable2, left.surname between right.surname[1..10]+'AAAAAAAAAA' and right.surname[1..10]+'ZZZZZZZZZZ' and left.age=right.age,all)); //This should not generate a self join output(join(namesTable, namesTable, left.age between right.age - 10 and right.age +10));
Example code from Wikipedia:
D := DATASET([{'ECL'},{'Declarative'},{'Data'},{'Centric'},{'Programming'},{'Language'}],{STRING Value;});
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Last updated August 9th, 2020