Uma indlela ikhona phakathi kwamanodi amabili kugrafu, igrafu isuke ixhunyiwe. Lokhu kusho ukuthi kukhona indlela phakathi kwanoma yimaphi amanodi amabili kugrafu, nokuthi igrafu ayiyona i-acyclic.
var path = require('path');
if (path.existsSync('/etc/passwd')) {
console.log('Path exists.');
} else {
console.log('Path does not exist.');
}
Umugqa wokuqala udala okuguquguqukayo okubizwa ngokuthi umzila odinga imojuli 'yendlela'. Imojula 'yendlela' iyimojuli yeNode.js ewumongo ehlinzeka ngezinsiza zokusebenza ngefayela nezindlela zohla lwemibhalo.
Umugqa wesibili uhlola ukuthi indlela '/etc/passwd' ikhona yini. Uma kwenzeka, 'Indlela ikhona.' umyalezo ungene ku-console. Uma ingekho, 'Indlela ayikho.' umyalezo ungene ku-console.
Iyini indlela
?
Ku-JavaScript, indlela iwukulandelana kwezinhlamvu ezimele indawo ohlelweni lwefayela.
uma indlela ikhona
Yebo, into yendlela ikhona ku-JavaScript. Inikeza izindlela zokubuyisa indlela eya kufayela noma umkhombandlela, kanye nokunquma indlela yesistimu yefayela yefayela noma umkhombandlela othile.
