读取某个单元格的值

@param x X坐标，从0计数，既列号
@param y Y坐标，从0计数，既行号
@return 值，如果单元格无值返回null
@since 4.0.3
171261
public Object readCellValue(int x, int y) {
		return CellUtil.getCellValue(getCell(x, y), this.cellEditor);
	}
138320
function (x, y, forcePickAll) {
        var out = this.pickAll(x, y, [], forcePickAll);
        return out[0] || null;
    }
381012
function(j) {
            	if (j > this.elements[0].length) { return null; }
            	var col = [], n = this.elements.length;
            	for (var i = 0; i < n; i++) { col.push(this.elements[i][j - 1]); }
            	return $V(col);
                }
1007407
function() {
    if (!this.isSquare()) { return null; }
    var tr = this.elements[0][0], n = this.elements.length - 1, k = n, i;
    do { i = k - n + 1;
      tr += this.elements[i][i];
    } while (--n);
    return tr;
  }
508731
public Shape<?> findShapeAtPoint(final int x, final int y)
    {
        if (isVisible())
        {
            final SelectionLayer selection = getSelectionLayer();

            if (null != selection)
            {
                final ImageDataPixelColor rgba = selection.getContext().getImageDataPixelColor(x, y);// x,y is adjusted to canvas coordinates in event dispatch

                if (null != rgba)
                {
                    if (rgba.getA() != 255)
                    {
                        return null;
                    }
                    final Shape<?> shape = m_shape_color_map.get(rgba.toBrowserRGB());

                    if ((null != shape) && (shape.isVisible()))
                    {
                        return shape;
                    }
                }
            }
        }
        return null;
    }
1236679
function(node) {
            node = Y.Dom.get(node);
            if (!node) {
                return null;
            }

            return Y.Dom.getNextSiblingBy(node);
        }
410679
public final Object getValue(int varNum) {
    int index = getValueIndex(varNum);
    if (index < 0) {
      return null;
    } else {
      return values[index];
    }
  }
1172181
function(x) {
            	var index = null, n = this.elements.length;
            	for (var i = 0; i < n; i++) {
            	    if (index === null && this.elements[i] == x) {
            		index = i + 1;
            	    }
            	}
            	return index;
                }
951289
@Nullable
	public static <T> T get(T[] array, int index) {
		return array != null && index >= 0 && index < array.length ? array[index] : null;
	}
722467
function elemObjEq(x, y) {
  return (Number.isNaN(x) && Number.isNaN(y)) || x === y;
}
1197181
@Override
    public <Y> Expression<Y> coalesce(Expression<? extends Y> arg0, Y arg1)
    {
        // TODO Auto-generated method stub
        return null;
    }
1031127
public static <T> T getNotNull(T... ts) {
        if (isNotEmpty(ts)) {
            for (T t : ts) {
                if (isNotNull(t)) {
                    return t;
                }
            }
        }
        return null;
    }
323801
public SDVariable pow(SDVariable x, SDVariable y) {
        return pow(null, x, y);
    }
1352832
public int count(T x, T y) {
        long index = getIndex(x, y);
        int count = counts.get(index);
        count++;
        counts.put(index, count);
        sum++;
        return count;
    }
371064
public Space findSpace(float x, float y) {
		for (int i=0;i<spaces.size();i++) {
			Space space = getSpace(i);
			if (space.contains(x,y)) {
				return space;
			}
		}
		
		return null;
	}
533047
public static double randomNum(int x, int y) {
        int max = x + 1;
        int min = y + 1;
        Random random = new Random();
        int result = random.nextInt(max)%(max-min+1) + min;
        return result - 1;
    }
13174
public double get(int x, int y) {
    return (x == y) ? 0 : (x < y) //
        ? matrix[MatrixParadigm.triangleSize(y) + x] //
        : matrix[MatrixParadigm.triangleSize(x) + y];
  }