Download SNOBOL 4 Programming Language by Ralph E Griswold PDF

By Ralph E Griswold

Snobol four Programming Language (Automatic Computation)

Show description

Read or Download SNOBOL 4 Programming Language PDF

Similar programming: programming languages books

PHP MySQL avec Flash 8

Réaliser des websites dynamiques en Flash avec ActionScript, MySQL et personal home page (versions five ou 4). remark afficher sur net des données en temps réel, tels les résultats d'une élection ou le ranking d'un fit de tennis ? Grâce à Flash eight, Hypertext Preprocessor et MySQL, qui permettent de concevoir des interfaces net graphiques et conviviales, couplées à des bases de données.

The Web Designers Guide to iOS Apps: Create iPhone, iPod touch, and iPad apps with Web Standards (HTML5, CSS3, and j#097;vascript)

While you are a clothier who understands HTML, CSS, and javascript, you could simply how one can make local iPhone, iPod contact, and iPad apps—and distribute them all over the world through the App shop. while mixed with an Objective-C framework, net criteria can be utilized to structure and elegance content material for iOS, utilizing local controls and behaviors for an actual Apple person event.

Extra info for SNOBOL 4 Programming Language

Sample text

CAHILL ~REM (REM • PO) COLLINGSWOODt ( TAB ( 2 9 ) . NAME ) (REM . 12 POS and RPOS POS (integer) and RPOS (integer) are primitive functions whose values are pattern structures. These pattern structures match the null string if the cursor is at a point in the subject string specified by the integer argument. POS ( N) succeeds, matching the null string, only if the cursor is positioned just at the right of the Nth character. RPOS ( N) succeeds, matching the null string, only if the cursor is positioned just at the left of the Nth character from the end of the subject string.

The statement P1 $ V1 PAT • V2 builds a pattern structure where variables V 1 and V2 are both associated with the pattern P 1 , V 1 as immediate assignment and V2 as conditional assignment. Changing the order of association to PAT P1 • V2 $ V1 has no effect on the value assignment. If PAT is involved in a successful pattern match, V 1 and V2 are assigned the same value. If the pattern match fails, the value of V 1 might be changed but the value of V2 is not. 6 The Null String in Pattern Matching The null string is the string of zero length.

The scanner has a pointer called the cursor which is positioned to the left of the character that the scanner must match. A second pointer called the needle points at the component to be matched. Consider the following example, in which the string of characters READS is matched by a pattern structure that is the value of BR. BR ( 'B 'READS' BR I I R I) (IE I 'EA I) (I D I IDS I) For illustrative purposes, 1t 1s convenient to think of components of a pattern structure as a set of beads that the scanner is trying to thread using the needle.

Download PDF sample

Rated 4.11 of 5 – based on 28 votes