在乳胶报告中,我要写一个正则表达式.整个报告中只有一个,所以我真的不想使用包等等.这是我正在谈论的正则表达式:
^\"((\w|\s)+)\"$
我为Latex想出了这个:
\grave{ }\backslash\"'((\backslash w\| \backslash s)+)\backslash \"' \backslash \$
这给了我10个错误,我真的看不出有什么问题.好吧,它看起来很糟糕,但所有命令都应该工作..
提前致谢,
危害
我在Python中使用'append'有一些性能问题.我正在编写一种算法来检查(大)圆圈中是否有两个重叠的圆圈.我首先将圆圈的极点(x_i-R_i和x_i + R_i)放在一个列表中,然后对列表进行排序.
class Circle:
def __init__(self, middle, radius):
self.m = middle
self.r = radius
在我之间生成N个随机圆圈并将它们放在"圆圈"列表中.
"""
Makes a list with all the extreme points of the circles.
Format = [Extreme, left/right ~ 0/1 extreme, index]
Seperate function for performance reason, python handles local variables faster.
Garbage collect is temporarily disabled since a bug in Python makes list.append run in O(n) time instead of O(1)
"""
def makeList():
"""gc.disable()"""
list = []
append = list.append
for circle in circles:
append([circle.m[0]-circle.r, …我遇到过以前遇到过的问题,但我仍然不知道为什么会这样.这是代码:
package Program;
import java.util.ArrayList;
import java.util.Iterator;
/**
* This class will hold the full collection of the user.
*
* @author Harm De Weirdt
*/
public class ShowManager {
/**
* The collection of shows of this user.
*/
private ArrayList<Show> collection;
private static final ShowManager INSTANCE = new ShowManager();
// Private constructor prevents instantiation from other classes
private ShowManager() {
collection = new ArrayList<Show>();
}
public static ShowManager getInstance() {
return INSTANCE;
}
private ArrayList<Show> getCollection() {
return …