cdm/src/main/java/ucar/nc2/util/cache/SmartArrayInt.java
public int findIdx(int want) {
    if (isConstant) return (want == start)  ? 0 : -1;
    if (isSequential) return want - start;
    if (isSorted) {
      return Arrays.binarySearch(raw, want);
    }
    // linear search
    for (int i=0; i<raw.length; i++)
      if (raw[i] == want) return i;
    return -1;
  }
public int findIdx(int want) {
    if (isConstant) return (want == start)  ? 0 : -1;
    if (isSequential) return want - start;
    if (isSorted) {
      return Arrays.binarySearch(raw, want);
    }
    // linear search
    for (int i=0; i<raw.length; i++)
      if (raw[i] == want) return i;
    return -1;
  }
Find which index holds the value want
@param want  value wanted
@return < 0 if not found, else the index. If duplicates, then return any match