Babban matsala tare da samun kari na fayil shine cewa suna iya zama da rudani sosai. Akwai nau'ikan fayil iri daban-daban da kari na fayil, kuma yana iya zama da wahala a san wanda za a yi amfani da shi.
var fileName = "sample.txt";
var fileExtension = fileName.split('.').pop();
Wannan lambar tana bayyana ma'anar maษalli da ake kira "fileName" kuma ta sanya masa ฦimar "sample.txt". Daga nan sai ta ayyana maโanar maโana da ake kira โfileExtensionโ sannan ta sanya masa kimar sakamakon gudanar da hanyar โtsagaโ akan maโaunin โfileNameโ, ta amfani da lokaci (.) a matsayin mai raba, sannan yana tafiyar da hanyar โpopโ kan. sakamakon haka. Sakamakon net shine cewa ma'aunin "fileExtension" ya ฦare yana dauke da darajar ".txt", wanda shine tsawo na fayil na fayil "sample.txt".
Takardun bayanai
Tsarin bayanai shine tsarin bayanai a Python da R wanda ke ba ku damar adana bayanan tabular a cikin tsari mai dacewa. A cikin JavaScript, zaku iya ฦirฦirar tsarin bayanai ta amfani da aikin d3.data. Wannan aikin yana ษaukar abu azaman hujjarsa ta farko, kuma yana mayar da abu DataFrame. Hakanan zaka iya amfani da hanyoyi daban-daban akan abun DataFrame don samun dama da sarrafa bayanan ku.
Kwafi Tsarin Tsarin
Tsarin kwafi hanya ce ta haษa lambobin da ke da alaฦa tare. Suna ba ka damar sake amfani da lambar ta yin kwafinsa tsakanin wurare daban-daban.
Mafi yawan amfani da tsarin kwafi shine a cikin shirye-shiryen da suka dace da abu. A cikin shirye-shiryen da suka dace da abu, galibi kuna ฦirฦira abubuwa sannan ku yi amfani da lamba iri ษaya don ฦirฦirar abubuwan waษannan abubuwan. Kuna iya yin haka ta ฦirฦirar kwafin lambar da ke ฦirฦirar misalin abu, sannan canza sunaye masu canzawa don dacewa da sunan ajin.
Hakanan zaka iya amfani da tsarin kwafi a cikin JavaScript zuwa lambar da ke da alaฦa tare. Misali, zaku iya amfani da tsarin kwafi don adana duk masu canjin ku wuri guda. Kuna iya amfani da wannan tsarin don samun damar waษancan masu canji daga ko'ina cikin lambar ku.
