Babban matsala tare da nuna shekarar haƙƙin mallaka akan kafofin watsa labaru na dijital shine cewa yana iya zama da wahala a iya tantance shekarun da haƙƙin mallaka ke rufewa. Wannan na iya zama matsala yayin ƙoƙarin tantance ko wani yanki na kafofin watsa labarai har yanzu yana da kariya ta haƙƙin mallaka.
var d = new Date();
var n = d.getFullYear();
document.getElementById("year").innerHTML = n;
Wannan lambar tana ƙirƙirar sabon abu na kwanan wata, sannan ya sami cikakken shekara daga abin kwanan wata kuma ya adana shi a cikin m. A ƙarshe, yana nemo kashi tare da id=”shekara” kuma yana canza HTML na ciki zuwa ƙimar n.
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A cikin JavaScript, zaku iya amfani da aikin bincike () don nemo kirtani a cikin buffer rubutu ko kirtani. Aikin bincike () yana ɗaukar gardama guda biyu: rubutun don bincika da kirtani don nema.
Ayyukan bincike () yana dawo da abu tare da kaddarori biyu: rubutun da aka samo da matsayi na rubutun da aka samo a cikin rubutu ko kirtani. Kayan rubutun da aka samo ya ƙunshi madaidaicin kirtani, yayin da dukiyar matsayi ta gaya muku inda a cikin madaidaicin rubutu ko kirtani aka sami kirtan da ta dace.
Ga misalin da ke amfani da aikin bincike () don nemo duk misalan “cat” a cikin fayil ɗin rubutu:
var fayil = "./myfile.txt"; // buɗe fayil ɗin don karanta abubuwan var = file.search (“cat”); // sami wani abu dauke da // foundText da matsayi console.log(abun ciki); // buga "Babu sakamako."
Hanyar
Akwai hanyoyi da yawa a JavaScript. An jera wasu daga cikin hanyoyin gama gari a ƙasa.
Faɗakarwar Siffanta Hanyar() Yana Nuna saƙo akan allon. bind() Yana ɗaure aiki zuwa wani lamari na musamman. kira () Kiran aiki. clear() Yana share allon. console.log() Yana buga bayanai zuwa na'ura mai kwakwalwa. document.getElementById(id) Yana dawo da wani kashi ta sifansa id. exit() Yana ƙare aikin rubutun kuma ya koma babban taga mai bincike. forKowane() Yana maimaitu toshe lambar don kowane abu a cikin tsari ko tarin. idan (sharadi) Yana kimanta yanayin kuma, idan gaskiya ne, yana aiwatar da lambar da ke cikin toshe; in ba haka ba, yana aiwatar da wani block na code. maɓalli(wani abu) Yana haifar da aukuwa lokacin da aka danna ƙasa akan madannai. ƘarsheModified Kwanan Yana Komawa ko saita kwanan wata da lokacin da aka gyara wannan takarda ta ƙarshe (a cikin millise seconds). tsayi Yana mayar da tsayin abu (a cikin bytes). Math.floor(lamba) Zagaye lamba ƙasa zuwa ƙimar lamba mafi kusa. Lissafi . ceil(lamba) Lambar zagayawa har zuwa ƙimar lamba mafi kusa . sabon Kwanan wata () Yana ƙirƙira sabon abin kwanan wata ta amfani da kwanan wata da lokaci na yanzu azaman sigoginsa (a cikin millise seconds). Object clone() Yana ƙirƙira da dawo da kwafin abu obj . prototype Yana ba ku damar samun dama ga kaddarori da hanyoyin sarkar samfurin abu (watau abubuwan da aka samo daga wannan abu). pushStackTrace(stackTrace) Yana ƙara bayanan tara bayanai zuwa saƙon kuskure da na'ura wasan bidiyo ke nunawa. setTimeout(lokaci, [kira]) Yana saita lokacin ƙarewa don aiwatar da lambar bayan da aka ba da adadin miliyon daƙiƙai; idan an bayar da dawo da kira, za a aiwatar da shi bayan ƙarewar lokaci ya ƙare setInterval(lokaci, [kira]) Yana saita tazara don aiwatar da lambar bayan da aka ba da adadin miliyon daƙiƙai; idan an bayar da dawo da kira, za a aiwatar da shi duk lokacin da tazarar ta ƙare
