A junction is an unordered composite value of zero or more values. Junctions autothread over many operations, which means that the operation is carried out for each junction element (also known as eigenstate), and the result is the junction of the return values of all those operators.
Junctions collapse into a single value in Boolean context, so when used in a conditional, a negation or an explicit coercion to Bool through the so or ? prefix operators. The semantics of this collapse depend on the junction type, which can be all, any, one or none.
Junctions are very special objects. They fall outside the Any hierarchy, being only, as any other object, subclasses of Mu. That enables a feature for most methods: autothreading. Autothreading happens when a junction is bound to a parameter of a code object that doesn't accept values of type Junction. Instead of producing an error, the signature binding is repeated for each value of the junction.
First autothreads over the infix: operator, producing the Junction 23. The next autothreading step is over infix:, which produces FalseTrue. The if conditional evaluates the junction in Boolean context, which collapses it to True. So the code prints yes\n.
Likewise, .contains returns a Boolean; thus, the autothreaded version returns a Junction of Booleans. In general, all methods and routines that take an argument of type T and return type TT, will also accept junctions of T, returning junctions of TT.
Negated operators are special-cased when it comes to autothreading. $a !op $b is rewritten internally as !($a op $b). The outer negation collapses any junctions, so the return value always a plain Bool.
Above, we've used prefix + operator on a Junction to coerce the strings inside of it to Numeric. Since the operator returns a Failure when a Str that doesn't contain a number gets coerced to Numeric, one of the elements in the Junction is a Failure. Failures do not turn into exceptions until they are used or sunk, but we can check for definedness to avoid that. That is what we do in the loop that runs over the elements of the junction, adding them to a list only if they are defined.
Autothreads the .Str method over its elements and returns results as a Junction. Output methods that use .Str method (print and put) are special-cased to autothread junctions, despite being able to accept a Mu type.
The infix concatenation can be used to merge junctions into a single one or merge Junctions with strings. The resulting junction will have all elements merged as if they were joined into a nested loop:
The Junction School was a typical one-room school. A wood stove sat in a sand box in the center of the school and was the only source of heat. Two kerosene lamps suspended from the ceiling at opposite ends of the room provided light. The teacher's desk and a chair were in front of the classroom. A small brass bell on the teacher's desk summoned the students. Students sat at double desks which had wooden tops with holes for the glass inkwells. The desks were arranged in rows facing the teacher's desk; the boys in one row and the girls in another.
I will create a nurturing learning environment for your children. I want them to feel safe and secure while at school and in the classroom. I will try my best to help your children become responsible, caring, life-long learners. I look forward to working with them and guiding them to become better people.
My mission is to provide my kindergarten students with a safe, nurturing and stimulating learning environment, where I will maintain high expectations for all. The atmosphere in my classroom will be one that values diversity, promotes problem solving and where everyone can experience success. My hope is that all students will develop a desire for knowledge and a love of learning!
I want to create a community in my classroom where every student feels supportive and takes initiative in their learning. My goal for this school year is for every student to leave my classroom feeling more confident in themselves than when they came in. I am committed to building a relationship with each student in order to support their individual needs and help develop them as a whole.
My mission as a teacher is to create a classroom environment that is fun, encouraging, and safe. I encourage responsibility, initiative, and respect in my classroom to ensure all students have the foundation to become a successful life-long learner. We live by the 7 Habits each day to be the best leaders we can be.
My mission as a teacher is to create a classroom with a positive and safe environment. I will empower students to become active learners, as well as challenge students to reach their highest potential.
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Cosmid walking of about 250 kb from MHC class III gene CYP21 to class II was conducted. The gene for receptor of advanced glycosylation end products of proteins (RAGE, a member of immunoglobulin superfamily molecules), the PBX2 homeobox gene designated HOX12, and the human counterpart of the mouse mammary tumor gene int-3 were found. The contiguous RAGE and HOX12 genes were completely sequenced, and the human int-3 counterpart was partially sequenced and assigned to a Notch homolog. This human Notch homolog, designated NOTCH3, showed both the intracellular portion present in the mouse int-3 sequence and the extracellular portion absent in the int-3. It thus corresponds to the intact form of a Notch-type transmembrane protein. About 20 kb of dense Alu clustering was found just centromeric to the NOTCH3.
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