data:image/png;base64,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Accepts any number of scripts as inputs. Launches a separate thread for each of them, so they are done in parallel, then waits for them all to complete.
This doesn't change how the Snap! scheduler works; the threads are not truly asynchronous. And there is no increase in speed. Rather, the point of this block is to allow starting synchronized but independent scripts.pt:executa _ em paralelo e espera
each scripttestAccepts any number of scripts as inputs. Launches a separate thread for each of them, so they are done in parallel, then continues with the current script while they all run.
This doesn't change how the Snap! scheduler works; the threads are not truly asynchronous. And there is no increase in speed. Rather, the point of this block is to allow starting synchronized but independent scripts.pt:executa _ em paralelo
The stream version of IN FRONT OF.
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is here in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:a prefixação de _ ao canal _
The stream version of ITEM 1 OF.
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:o primeiro item do canal _
The stream version of ALL BUT FIRST OF.
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:um canal com todos os itens de _ menos o primeiro
423true4The stream version of variadic MAP (any number of input lists, like
MULTIMAP in the list utilities library).
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:a aplicação de _ aos itens dos canais _
The stream version of KEEP.
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:os itens tais que _ do canal _
The inputs are a stream and a positive integer. SHOW STREAM reports a
regular finite list of length less than (for short finite streams) or equal to the
second input. It's useful because an infinite stream can't be displayed in a
finite amount of time.pt:uma lista com os itens do canal _ até ao _ º
1001Make a stream from a finite collection of items, like the LIST primitive.
Since this block is typically used for small amounts of data, it does not
delay computation of its inputs.pt:um canal com _
1Call this block with STREAM WITH NUMBERS FROM 2
as its input to get the infinite stream of all the prime numbers.
It's called SIEVE because the algorithm it uses is the Sieve of
Eratosthenes (clickable link):
https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes
Look inside; it's a beautifully elegant algorithm.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:a crivagem do canal _
The stream version of NUMBERS FROM 1 TO, with no
ending number because it reports the infinite stream of all
the integers greater than or equal to its input.
Read the code! It's deceptively simple.
Streams, also called lazy lists, are like lists except that
items are not computed until they're needed. This allows
for more efficient handling of large computed lists, and
even infinite lists. The only piece of magic is in
IN FRONT OF STREAM, whose second input is of type
Unevaluated, which means that it's a procedure, with
a sort of invisible gray ring. So HEAD OF STREAM is just
ITEM 1 OF, but TAIL OF STREAM has a CALL block
to make the computation happen.
For a tutorial introduction to streams, read SICP 3.5:
https://mitpress.mit.edu/sites/default/files/sicp/full-text/book/book-Z-H-24.html#%_sec_3.5
or Brian's lecture notes (start on page 74):
https://people.eecs.berkeley.edu/~bh/61a-pages/Volume2/notes.pdf
The above are clickable links!pt:um canal com os números a partir de _
1Read the code while running it, 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AoGAAAfoJgkQIECAgAD7AQIECBAgEAgIcIBukgABAgQIHLFxAWmhEwHPAAAAAElFTkSuQmCC