{"id":55548,"date":"2020-01-23T00:00:00","date_gmt":"2020-01-22T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/novaya-versiya-vstraivaemogo-javascript-dvizhka-ot-osnovatelya-qemu-i-ffmpeg"},"modified":"2020-02-18T14:03:40","modified_gmt":"2020-02-18T11:03:40","slug":"novaya-versiya-vstraivaemogo-javascript-dvizhka-ot-osnovatelya-qemu-i-ffmpeg","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/novaya-versiya-vstraivaemogo-javascript-dvizhka-ot-osnovatelya-qemu-i-ffmpeg","title":{"rendered":"Az \u00faj be\u00e1gyazott JavaScript motor a QEMU \u00e9s FFmpeg alap\u00edt\u00f3j\u00e1t\u00f3l","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A francia matematikus Fabrice Bellard, aki egykor a QEMU \u00e9s az FFmpeg projektek alap\u00edt\u00f3ja volt, k\u00f6zz\u00e9tette friss\u00edt\u00e9s\u00e9t a fejleszt\u00e9s alatt \u00e1ll\u00f3 kompakt be\u00e1gyazott JavaScript-motorhoz. QuickJS<\/a><\/noindex>A motor t\u00e1mogatja az ES2019 specifik\u00e1ci\u00f3t \u00e9s tov\u00e1bbi matematikai kiterjeszt\u00e9seket, mint p\u00e9ld\u00e1ul a BigInt \u00e9s BigFloat t\u00edpusokat. Teljes\u00edtm\u00e9nyben a QuickJS jelent\u0151sen fel\u00fclm\u00falja<\/a><\/noindex> megl\u00e9v\u0151 megfelel\u0151it fel\u00fclm\u00falja (motort,<\/a><\/noindex> DukTape-t t\u00f6bb mint k\u00e9tszer,<\/a><\/noindex> JerryScript-t h\u00e1romszor, m\u00edg<\/a><\/noindex> MuJS-t hetedszer.<\/a><\/noindex> h\u00e9tszer). A projekthez tartozik egy k\u00f6nyvt\u00e1r a motor be\u00e1gyaz\u00e1s\u00e1hoz, a qjs \u00e9rtelmez\u0151 a JavaScript-k\u00f3d parancssorb\u00f3l val\u00f3 futtat\u00e1s\u00e1hoz, \u00e9s a qjsc ford\u00edt\u00f3 az \u00f6n\u00e1ll\u00f3 v\u00e9grehajthat\u00f3 f\u00e1jlok gener\u00e1l\u00e1s\u00e1hoz. A k\u00f3d C nyelven \u00edr\u00f3dott \u00e9s terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> MIT licenc alatt \u00e1ll. A projektr\u0151l b\u0151vebb inform\u00e1ci\u00f3t a els\u0151 kiad\u00e1s\u00e1nak bejelent\u00e9s\u00e9ben tal\u00e1lhatunk.<\/a><\/noindex>.<\/p>\n

Az \u00faj verzi\u00f3ban k\u00eds\u00e9rleti t\u00e1mogat\u00e1s ker\u00fclt bevezet\u00e9sre a BigDecimal<\/a><\/noindex>, amely lehet\u0151v\u00e9 teszi a tizedes sz\u00e1mok tetsz\u0151leges pontoss\u00e1ggal t\u00f6rt\u00e9n\u0151 kezel\u00e9s\u00e9t (anal\u00f3g a BigInt-tel a 10 alap\u00fa sz\u00e1mok eset\u00e9ben). Friss\u00edt\u00e9sre ker\u00fclt az oper\u00e1torok t\u00falterhel\u00e9s\u00e9nek megval\u00f3s\u00edt\u00e1sa. \u00daj p\u00e9ld\u00e1kat<\/a><\/noindex> programokat adtak hozz\u00e1 a \u03c0 sz\u00e1m\u00e1nak hat\u00e9kony kisz\u00e1m\u00edt\u00e1s\u00e1hoz, egy milli\u00e1rd tizedesjegy pontoss\u00e1gig (mint matematikus, Fabrice Bellard arr\u00f3l h\u00edres, hogy \u0151 alkotta meg a leggyorsabb k\u00e9pletet a \u03c0 kisz\u00e1m\u00edt\u00e1s\u00e1ra).<\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0424\u0440\u0430\u043d\u0446\u0443\u0437\u0441\u043a\u0438\u0439 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u043a \u0424\u0430\u0431\u0440\u0438\u0441 \u0411\u0435\u043b\u043b\u0430\u0440 (Fabrice Bellard), \u043e\u0441\u043d\u043e\u0432\u0430\u0432\u0448\u0438\u0439 \u0432 \u0441\u0432\u043e\u0451 \u0432\u0440\u0435\u043c\u044f \u043f\u0440\u043e\u0435\u043a\u0442\u044b QEMU \u0438 FFmpeg, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e \u0438\u043c \u043a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u043e\u0433\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u043e\u0433\u043e JavaScript-\u0434\u0432\u0438\u0436\u043a\u0430 QuickJS. \u0414\u0432\u0438\u0436\u043e\u043a \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e ES2019 \u0438 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f, \u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a \u0442\u0438\u043f\u044b BigInt \u0438 BigFloat. \u041f\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 QuickJS \u0437\u0430\u043c\u0435\u0442\u043d\u043e \u043f\u0440\u0435\u0432\u043e\u0441\u0445\u043e\u0434\u0438\u0442 \u0438\u043c\u0435\u044e\u0449\u0438\u0435\u0441\u044f \u0430\u043d\u0430\u043b\u043e\u0433\u0438 (XS \u043d\u0430 35%, DukTape \u0431\u043e\u043b\u0435\u0435 \u0447\u0435\u043c \u0432 \u0434\u0432\u0430 \u0440\u0430\u0437\u0430, JerryScript \u0432 \u0442\u0440\u0438 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