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Programming Languages

by: Reed Aufderhar

Programming Languages CS 4700

Reed Aufderhar
Utah State University
GPA 3.85


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Class Notes
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This 2 page Class Notes was uploaded by Reed Aufderhar on Wednesday October 28, 2015. The Class Notes belongs to CS 4700 at Utah State University taught by Staff in Fall. Since its upload, it has received 8 views. For similar materials see /class/230456/cs-4700-utah-state-university in ComputerScienence at Utah State University.

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Date Created: 10/28/15
The Perl Cheat sheet CONTEXTS SlGlLS ARRAYS HASHES void scalar whole array hash scalar array slice arrayO 2 hash a b list hash element array0 hash a ampsub glob SCALAR VALUES number string reference glob undef REFERENCES references fool aka foogtl amp dereference foobar aka foogtbar anon arrayref fool2 aka foogtlgt2 anon hashref fool2 aka foogtl2 list of refs NUMBERS vs STRINGS OPERATOR PRECEDENCE gt eq He lt gt lt gt lt gt le ge l u u ltgt cmp x SYNTAX for LIST for abc ltlt gtgt while until named uops if elsif else lt gt lt gt lt gt le ge unless elsif else l ltgt eg ne cmp for eguals foreach ALWAYS REGEX METACHARS REGEX MODlElERS ampamp A string begin i case insens ll str end before n m line based A one or more s includes n zero or more x ign whspace etc zero or one g global gt 37 repeat in range list ops capture CHARCLASSES not no capture An and character class X20ftrn or xor alternation AZazO97 b word boundary 09 2 string end S W and D negate SPECIAL VARIABLES default variable program name process ID line number input separator ARGV command line args output separator lNC include paths autoflush 7 subroutine args syslibcall error ENV environment eval error Perl Cheat Sheet left left nonassoc right right left left left left nonassoc nonassoc nonassoc left left left left nonassoc right right left nonassoc right left left Operator Precedence terms and list operators leftward gt and unary and N 3N X ltlt gtgt named unary operators ltgtltgtltgtle ge ltgt eq ne cmp amp list operators rightward not and 01 XOI


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