{"id":87170,"date":"2020-07-04T19:42:14","date_gmt":"2020-07-04T17:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7"},"modified":"2020-07-04T19:42:14","modified_gmt":"2020-07-04T17:42:14","slug":"analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/analiz-riskov-pri-voploshhenii-v-zhizn-inicziativy-perl-7","title":{"rendered":"Analiza ryzyka przy wdra\u017caniu inicjatywy Perl 7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dan Book (<noindex><a rel=\"nofollow\" href=\"https:\/\/metacpan.org\/author\/DBOOK\">Dan Book<\/a><\/noindex>), wspieraj\u0105cy ponad 70 modu\u0142\u00f3w w CPAN, <noindex><a rel=\"nofollow\" href=\"http:\/\/blogs.perl.org\/users\/grinnz\/2020\/07\/perl-7-a-risk-benefit-analysis.html\">przeprowadzi\u0142 analiz\u0119<\/a><\/noindex> ryzyka przy wdra\u017caniu zaproponowanego <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53226\">planu wprowadzenia Perl 7<\/a><\/noindex>. Przypomnijmy, \u017ce w ga\u0142\u0119zi Perl 7 planowane jest w\u0142\u0105czenie domy\u015blnie trybu \u015bcis\u0142ej kontroli \u201estrict\u201d, aktywacja \u201euse warnings\u201d oraz zmiana warto\u015bci kilku parametr\u00f3w wp\u0142ywaj\u0105cych na zgodno\u015b\u0107 ze starszym kodem.<\/p>\n<p>Oczekuje si\u0119, \u017ce zmiana spowoduje niekompatybilno\u015b\u0107 wielu modu\u0142\u00f3w z CPAN w Perl 7 i wymusi wprowadzenie zmian w ka\u017cdym z tych modu\u0142\u00f3w, co jest nierealistyczne do zrealizowania w przewidzianym roku, zw\u0142aszcza \u017ce nie wszyscy autorzy pozostaj\u0105 dost\u0119pni. Nowe funkcje Perl 7 r\u00f3wnie\u017c nie pozwol\u0105 na u\u017cycie modu\u0142\u00f3w, kt\u00f3re maj\u0105 wspiera\u0107 nie tylko najnowsz\u0105 wersj\u0119 Perl.<\/p>\n<p>Wspomniane s\u0105 r\u00f3wnie\u017c takie mo\u017cliwe problemy:<\/p>\n<ul>\n<li class=\"l\"> Mylenie nowicjuszy z powodu niekompatybilno\u015bci niekt\u00f3rych przyk\u0142ad\u00f3w i rekomendacji z tutoriali napisanych dla Perl 5 w Perl 7.\n<li class=\"l\"> Nie zbadano wp\u0142ywu na rozw\u00f3j jednoliniowych skrypt\u00f3w. Perl jest aktywnie u\u017cywany nie tylko do pisania du\u017cych skrypt\u00f3w, ale tak\u017ce do tworzenia jednoliniowych skrypt\u00f3w i kr\u00f3tkich scenariuszy dla administrator\u00f3w, w kt\u00f3rych u\u017cywanie trybu strict jest zb\u0119dne.\n<li class=\"l\"> Dystrybucje maj\u0105 problem z jednoczesnym dostarczaniem plik\u00f3w wykonywalnych do uruchamiania skrypt\u00f3w Perl 7 i Perl 5 (oczekiwane powt\u00f3rzenie historii z Pythonem 2 i 3).\n<li class=\"l\"> Kod napisany dla Perl 7 nie musi szczeg\u00f3lnie zaznacza\u0107, \u017ce nie b\u0119dzie dzia\u0142a\u0142 w Perl 5, wielu programist\u00f3w nie b\u0119dzie podawa\u0107 minimalnie obs\u0142ugiwanej wersji.\n<li class=\"l\"> R\u00f3\u017cne narz\u0119dzia i modu\u0142y zwi\u0105zane z Perl 5 wymagaj\u0105 wprowadzenia poprawek.\n<li class=\"l\"> Przygotowanie Perl 7 z powodu redystrybucji zasob\u00f3w na jaki\u015b czas zamrozi rozw\u00f3j nowych funkcji Perl.\n<li class=\"l\"> Pojawia si\u0119 ryzyko wypalenia i odej\u015bcia aktywnych programist\u00f3w interpretera Perl, modu\u0142\u00f3w, narz\u0119dzi i pakiet\u00f3w towarzysz\u0105cych z powodu powstania du\u017cego dodatkowego obci\u0105\u017cenia bez odpowiedniej motywacji (nie wszyscy zgadzaj\u0105 si\u0119 z konieczno\u015bci\u0105 stworzenia Perl 7).\n<li class=\"l\"> Fundamentalnie zmieni si\u0119 kultura w spo\u0142eczno\u015bci i stosunek do stabilno\u015bci Perl.\n<li class=\"l\"> Autorytet j\u0119zyka zostanie podwa\u017cony z powodu krytyki naruszenia kompatybilno\u015bci Perl 7 z istniej\u0105cym kodem przy braku czego\u015b zasadniczo nowego.\n<\/ul>\n<p>Aby z\u0142agodzi\u0107 negatywne skutki, Dan Book zaproponowa\u0142 sw\u00f3j plan, kt\u00f3ry pozwoli unikn\u0105\u0107 przerwy w zgodno\u015bci. Proponuje si\u0119 utrzymanie wcze\u015bniejszego procesu rozwoju i zamiast 5.34.0 przypisa\u0107 nast\u0119pnej wersji numer 7.0.0, w kt\u00f3rej wy\u0142\u0105czona zostanie obs\u0142uga po\u015bredniej notacji wywo\u0142ania obiekt\u00f3w oraz wprowadzone zostan\u0105 nowe funkcje, takie jak try\/catch. Zmiany takie jak \u201euse strict\u201d i \u201euse warnings\u201d maj\u0105 by\u0107 regulowane przez wyra\u017ane wskazanie wersji Perla w kodzie za pomoc\u0105 pragmy \u201euse v7\u201d (strict jest ju\u017c domy\u015blnie w\u0142\u0105czany dla \u201euse v5.12\u201d i nowszych wyda\u0144). <\/p>\n<p>Domy\u015blnie w interpreterze zaleca si\u0119 zachowanie zestawu parametr\u00f3w, kt\u00f3ry nie r\u00f3\u017cni si\u0119 od Perl 5, z wyj\u0105tkiem standardowego procesu czyszczenia przestarza\u0142ej sk\u0142adni, stosowanej wcze\u015bniej. Obs\u0142ug\u0119 starych funkcji i przestarza\u0142ej sk\u0142adni mo\u017cna, jak dot\u0105d, zako\u0144czy\u0107 zgodnie z istniej\u0105cymi zasadami przekszta\u0142cania funkcjonalno\u015bci do kategorii przestarza\u0142ej. Sygnalizowanie u\u017cycia w kodzie nowych element\u00f3w Perl 7 oraz dla rozdzielenia nowego i starego stylu proponuje si\u0119 za pomoc\u0105 pragmy \u201euse v7\u201d.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>\u0179r\u00f3d\u0142o: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53284\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u044d\u043d \u0411\u0443\u043a (Dan Book), \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0438\u0439 \u0431\u043e\u043b\u0435\u0435 70 \u043c\u043e\u0434\u0443\u043b\u0435\u0439 \u0432 CPAN, \u043f\u0440\u043e\u0432\u0451\u043b \u0430\u043d\u0430\u043b\u0438\u0437 \u0440\u0438\u0441\u043a\u043e\u0432 \u043f\u0440\u0438 \u0432\u043e\u043f\u043b\u043e\u0449\u0435\u043d\u0438\u0438 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u043e\u0433\u043e \u043f\u043b\u0430\u043d\u0430 \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f Perl 7. \u041d\u0430\u043f\u043e\u043c\u043d\u0438\u043c, \u0447\u0442\u043e \u0432 \u0432\u0435\u0442\u043a\u0435 Perl 7 \u043d\u0430\u043c\u0435\u0440\u0435\u0432\u0430\u044e\u0442\u0441\u044f \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0440\u0435\u0436\u0438\u043c \u0441\u0442\u0440\u043e\u0433\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 &#171;strict&#187;, \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u0442\u044c &#171;use warnings&#187; \u0438 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0440\u044f\u0434\u0430 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432, \u0432\u043b\u0438\u044f\u044e\u0449\u0438\u0445 \u043d\u0430 \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441\u043e \u0441\u0442\u0430\u0440\u044b\u043c \u043a\u043e\u0434\u043e\u043c. \u041e\u0436\u0438\u0434\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u0432\u0435\u0434\u0451\u0442 \u043a \u043d\u0435\u0440\u0430\u0431\u043e\u0442\u043e\u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u0438 \u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-87170","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u044d\u043d \u0411\u0443\u043a (Dan Book), 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