小编sac*_*ula的帖子

>>> a=[1,2,3]
>>> a.remove(2)
>>> a
[1, 3]
>>> a=[1,2,3]
>>> del a[1]
>>> a
[1, 3]
>>> a= [1,2,3]
>>> a.pop(1)
2
>>> a
[1, 3]
>>> 

以上三种方法从列表中删除元素有什么区别吗？

Traceback (most recent call last):
File "/run-1341144766-1067082874/solution.py", line 27, in 
main()
File "/run-1341144766-1067082874/solution.py", line 11, in main
if len(s[i:j+1]) > 0:
MemoryError
Error in sys.excepthook:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
from apport.fileutils import likely_packaged, get_recent_crashes
File "/usr/lib/python2.7/dist-packages/apport/__init__.py", line 1, in 
from apport.report import Report
MemoryError

Original exception was:
Traceback (most recent call last):
File "/run-1341144766-1067082874/solution.py", line 27, in 
main()
File "/run-1341144766-1067082874/solution.py", line 11, in main
if len(s[i:j+1]) > 0:
MemoryError

当我尝试运行以下程序时出现上述错误.有人可以解释什么是内存错误,以及如何解决这个问题？.程序将字符串作为输入并查找所有可能的子字符串并从中创建一个集合(按字典顺序排列),它应该在用户询问的相应索引处打印该值,否则应打印"无效"

def main(): …

内省排序开始于快速排序并切换时递归深度超过基于元件的数量被分类的水平堆排序.这个数字是多少？是否有特定的范围或限制值？

我正在尝试实现一个控件来显示视频的进度,我正在使用带有自定义拇指图像的UISlider,但拇指图像不是从头开始,也不会一直持续到最后.

playerProgress = UISlider(frame: CGRectMake((btnImage.size.width + 2 * VideoViewControllerUX.ControlPadding), 0, (screenRect.size.width - (btnImage.size.width + 3 * VideoViewControllerUX.ControlPadding)), btnImage.size.height))
playerProgress.setThumbImage(UIImage(named: "slider"), forState: UIControlState.Normal)
playerProgress.maximumValue = 100
playerProgress.minimumValue = 0
playerProgress.addTarget(self, action: "playerProgressChanged:", forControlEvents: UIControlEvents.ValueChanged)

我不知道最近发生了什么.

拇指图像:

#include <stdio.h>

int main(){
    int l,m,q,j;
    char option;
    scanf("%d",&q);
    printf("%d\n",q);
    for(j=0;j<q;j++){
        scanf("%c %d %d",&option,&l,&m);
        printf("%c %d %d",option,l,m);
    }
    return 0;
}

输出:

3(Input)
3
C 1 4(Input)

 0 -374066224C 1 4

上面的代码有什么问题？它没有给出预期的输出.