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Test: AP Computer Science A
| 1. | Which of the following defines a method that successfully deletes an item from an array of integers? |
None of these work correctly
public static int[] del(int[] a,int delIndex) {
if(a == null || delIndex < 0 || delIndex >= a.length) {
return null;
}
for(int i = 0; i <= delIndex; i++) {
if(i == delIndex) {
delete a[i];
break;
}
}
return a;
}
public static int[] del(int[] a,int delIndex) {
if(a == null || delIndex < 0 || delIndex >= a.length) {
return null;
}
int[] ret = new int[a.length - 1];
for(int i1=0,i2 = 0; i1 < a.length; i1++) {
if(i1 == delIndex) {
delete a[i1];
}
}
return ret;
}
public static int[] del(int[] a,int delIndex) {
if(a == null || delIndex < 0 || delIndex >= a.length) {
return null;
}
int[] ret = new int[a.length - 1];
for(int i1=0,i2 = 0; i1 < a.length; i1++) {
if(i1 != delIndex) {
ret[i2] = a[i1];
i2++;
}
}
return ret;
}
public static int[] del(int[] a,int delIndex) {
if(a == null || delIndex < 0 || delIndex >= a.length) {
return null;
}
int[] ret = new int[a.length - 1];
for(int i = 0; i <= delIndex; i++) {
ret[i] = a[i];
}
return ret;
}
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