How to resolve the algorithm Quoting constructs step by step in the Smalltalk programming language

Published on 12 May 2024 09:40 PM
#Smalltalk

How to resolve the algorithm Quoting constructs step by step in the Smalltalk programming language

Table of Contents

Problem Statement

Pretty much every programming language has some form of quoting construct to allow embedding of data in a program, be it literal strings, numeric data or some combination thereof. Show examples of the quoting constructs in your language. Explain where they would likely be used, what their primary use is, what limitations they have and why one might be preferred over another. Is one style interpolating and another not? Are there restrictions on the size of the quoted data? The type? The format? This is intended to be open-ended and free form. If you find yourself writing more than a few thousand words of explanation, summarize and provide links to relevant documentation; but do provide at least a fairly comprehensive summary here, on this page, NOT just a link to [See the language docs]. Note: This is primarily for quoting constructs for data to be "embedded" in some way into a program. If there is some special format for external data, it may be mentioned but that isn't the focus of this task.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Quoting constructs step by step in the Smalltalk programming language

Source code in the smalltalk programming language

$a
$Å
$日


'hello'
'日本語


c'hello\nthis\tis a C string\0x0D'


e'hello world; it is now {Time now}\n'


#( 1 1.234 (1/2) foo 'hello' #(9 8 7) (99 88 77) $λ '日本語' true [1 2 3] false)


#[ 1 2 16rFF 2r0101010 ]


#'foo'
#'foo bar baz'
#foo.  " same as #'foo' "
#'++'
#++  " same as #'++' "
#a:b:c:  " same as #'a:b:c:' "


[ expression . expression ... expression ]


[:arg1 :arg2 :... :argN | expression . expression ... expression ]


aBlock value.  "evaluate the block, passing no argument"
anotherBlock value:1 value:2. "evaluate the block, passing two arguments"


in the True class:
ifTrue: aBlock
    ^ aBlock value "I am true, so I evaluate the block"

in the False class:
ifTrue: aBlock
    ^ nil  "I am false, so I ignore the block"


#{
    foo:  <someConstant>
    bar:  <someConstant>
}


#u16( 1 2 3 ).  " an array of unsigned int16s "
#u32( 1 2 3 ).  " an array of unsigned int32s "
#u64( 1 2 3 ).  " an array of unsigned int64s "
#s16( -1 2 3 ). " an array of signed int16s "
#s32( -1 2 3 ). " an array of signed int32s "
#s64( -1 2 3 ). " an array of signed int64s "
#f16( -1 2.0 3 ). " an array of float16s "
#f32( -1 2.0 3 ). " an array of float32s "
#f64( -1 2.0 3 ). " an array of float64s "
#b( 1 0 1 1 0 0 ). " an array of bits "
#B( true false true true ). " an array of booleans "

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