Question

我需要帮助从数组中删除元组。我已经尝试过.delete，.remove和.pop以不占优势。请帮忙！

删除（红色，绿色，蓝色）：从色彩图中删除给定的RGB颜色。颜色必须包含在颜色图中才能被删除。

project.pbxproj

这是我们使用python数组的数组模块。

EZARRAYS

from ezarrays import Array

class Colormap :
  def __init__ (self, k) :
    self._theColors = Array(k)
    self._capacity = k
    self._numItems = 0

  def __len__(self) :
    return self._numItems

  def contains(self, red, green, blue) :
    color = Color(red, green, blue)
    for i in range(self._numItems) :
        if self._theColors[i].red == red :
            if self._theColors[i].green == green :
                if self._theColors[i].blue == blue :
                    return True
        return False  

  def add(self, red, green, blue) :
    if self._numItems == self._capacity :
        self._expandArray()
    color = Color(red, green, blue)
    index = self._numItems
    self._theColors[index] = color
    self._numItems = self._numItems + 1  

  def remove(self, red, green, blue) :
    color = Color(red, green, blue)
    for i in range(len(self)) :
        if self._theColors[i].red == red :
            if self._theColors[i].green == green :
                if self._theColors[i].blue == blue :
                    self._theColors.remove(red)
                    self._theColors.delete(color.green)
                    self._theColors.delete(color.blue)
                    self._numItems = self._numItems - 1
        else :
            return -1

  def map(self, red, green, blue) :
    pass

  def itBegin(self) :
    pass

  def itNext(self) :
    pass

  # Helper method to extend the length of the array.
  def _expandArray(self) :
    tempArray = Array( self._numItems * 2 )
    self._capacity = self._capacity * 2
    for i in range(len(self._theColors)) :
        tempArray[i] = self._theColors[i]
    self._theColors = tempArray


# Storage class holding the color values.    
class Color :
  def __init__ (self, red, green, blue) :
    if red < 0 :
        red = 0
    elif red > 255 :
        red = 255
    self.red = red

    if green < 0 :
        green = 0
    elif green > 255 :
        green = 255
    self.green = green

    if blue < 0 :
        blue = 0
    elif blue > 255 :
        blue = 255
    self.blue = blue

Answer 1

问题似乎出现在Colormap.remove()中。当我想要尝试从数组中删除元素时，您似乎正在尝试删除Color对象中的字段，该字段存储为数组中的元素。一个解决方案是创建一个新的Array并用所需的元素填充它（除了你想要删除的元素之外的所有元素）。

  def remove(self, red, green, blue) :
    color = Color(red, green, blue)
    for i in range(len(self)) :
        if self._theColors[i].red == red :
            if self._theColors[i].green == green :
                if self._theColors[i].blue == blue :
                    # Changes made below this line
                    self._numItems = self._numItems - 1
                    tempArray = Array( self._capacity )
                    ind = 0
                    for j in range(len(self)) :
                        if j is not i:
                            tempArray[ind] = self._theColors[ind]
                            ind = ind + 1
                    self._theColors = tempArray
        else :
            return -1

之后，看起来这样可以正常工作，除了Colormap.contains（）返回None而不是False。

cmap = Colormap(1)
cmap.add(100,100,100)
print(cmap.contains(100,100,100))  # Prints "True"
cmap.remove(100,100,100)  
print(cmap.contains(100,100,100))  # Prints "None"

我对ctypes库不太熟悉，但是如果你能找到一种方法来删除元素self._theColors[i]，那就会产生同样的效果。

从数组中删除元组

1 个答案: