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- function extract(l,chiave,x)
- {
- var cur,prev;
- if(l.testa==null)
- {
- return undefined;
- }
- cur= l.testa; prev=null;
- while(cur!=null && cur.dato[chiave]!=x)
- {
- prev=cur;
- cur=cur.next;
- }
- if(prev==null)
- {
- l.testa=l.testa.next;
- return cur.dato;
- }
- else if(cur==null)
- {
- prev.next=null;
- l.coda=prev;
- return cur.dato;
- }
- else
- {
- prev.next=cur.dato;
- return cur.dato;
- }
- }
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