Deletions Practice Test

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 i = 0; i <= delIndex; i++) {

ret\[i\] = a\[i\];

}

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) {

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;

}

None of these work correctly