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For character strings, the standard library uses the convention that strings are null-terminated: a string of n characters is represented as an array of n + 1 elements, the last of which is a "NUL character" with numeric value 0. The only support for strings in the programming language proper is that the compiler translates quoted string ...
In 1973, ECMA-35 and ISO 2022 [18] attempted to define a method so an 8-bit "extended ASCII" code could be converted to a corresponding 7-bit code, and vice versa. [19] In a 7-bit environment, the Shift Out would change the meaning of the 96 bytes 0x20 through 0x7F [a] [21] (i.e. all but the C0 control codes), to be the characters that an 8-bit environment would print if it used the same code ...
Moore, Lisa (2015-05-12), "Consensus 143-C5", UTC #143 Minutes, Add the 12 keycap sequences in emoji-data.txt as provisional named sequences in Unicode 8.0. L2/15-268 Beeton, Barbara; Freytag, Asmus; Iancu, Laurențiu; Sargent, Murray (2015-10-30), Proposal to Represent the Slashed Zero Variant of Empty Set
For example, if Σ = {0, 1} the string 0011001 is a rotation of 0100110, where u = 00110 and v = 01. As another example, the string abc has three different rotations, viz. abc itself (with u=abc, v=ε), bca (with u=bc, v=a), and cab (with u=c, v=ab).
g uc −1 ({ ‹A›, ‹bb› }) = { ‹a› }, since g uc (‹a›) = ‹A›, while ‹bb› cannot be reached by g uc. For the latter language, g uc (g uc −1 ({ ‹A›, ‹bb› })) = g uc ({ ‹a› }) = { ‹A› } ≠ { ‹A›, ‹bb› }. The homomorphism g uc is not ε-free, since it maps e.g. ‹0› to ε. A very simple string ...
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A string u is a member of the string set denoted by a generalized regular expression R if and only if ε is a member of the string set denoted by the derivative u −1 R. [11] Considering all the derivatives of a fixed generalized regular expression R results in only finitely many different languages.
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