console.log "january".substring(0,3);
console.log "melbourne is great".substring(0,12);
console.log "hamburgers".substring(4,10);
我试图理解为什么这不起作用?
console.log "january".substring(0,3);
console.log "melbourne is great".substring(0,12);
console.log "hamburgers".substring(4,10);
我试图理解为什么这不起作用?