0%

论文地址:https://link.springer.com/article/10.1631%2FFITEE.1910001

作者:潘云鹤

发表: Frontiers of Information Technology & Electronic Engineering

链接: https://link.springer.com/article/10.1631%2FFITEE.1910001

阅读全文 »

我的微信读书11月阅读时长

11月平均每日阅读43分钟,最高一天阅读4小时,总共21个小时。这意味着,这30天里,我大约有一整天的人生活在书里的世界。幸甚至哉!

这些时间最大头还是花在了《奇鸟行状录》里(不太值),其次应该是钱钟书的《宋诗选注》和黑格尔的《小逻辑》里。看上去好奇怪的组合,不过不然。这其实很符合我的阅读习惯,一般是不同类型的书同时阅读,每次依当天的状态和心情去择一本翻开。实际上,想读《小逻辑》的时候,和想读《奇鸟行状录》的时候,整个人的状态是完全不一样的。据我观察,当我精神状态极佳、心情大好的时候,最想读哲学类的书;情感泛滥(高涨或者低落)的时候,最想读诗;感到疲乏的时候,想读小说来消遣。我倒也根据这么一点小习性,大言不惭地自觉“随性”,除了读书随心所欲以外,生活中大大小小的事上,心态也大抵类似。(主要是小事,大事实际上还是有点优柔寡断的,还想改呢。)

不过呢,这个月挑来读的这几本书,跟我之前的阅读惯性相比还是比较突兀的。一方面,小说上,我已经挺久没读日本小说了。虽然以前也喜欢村上春树,但这次是带着一些“怀旧”的心情去读他的。根据我的规划,在这个人生阶段,我是想读一些陀氏和海明威的,再往后也想涉猎一些不太熟悉但十分严肃的作家。

阅读全文 »

互联网冲浪对于我来说最浪漫的事情之一,就是顺着一篇搜来的技术文档,随手点开博客主页时,发现博客中记满了朴素但真挚的生活感想。有哲思,有小故事,有少年得意的成就记叙,也有人到中年的感怀伤时……每个人的博客都是独一无二的,网站名字和独特装饰极力彰显着个性;但所有博客又有一个共同的特点,就是毫无保留的文字和期待被造访的心情。这就好像在漠然的大城市里,却有一些不起眼的小屋子,真诚地敞着所有的门窗,等待像我这样的,可能会来,也可能不会来的旅人。

In IT5003, I am studying data structures and algorithms. The language we learn with is Python. So I take notes about what I learned, and how to use them in Python. I struct my notes based on data structures, and all the ADTs that are implemented by the data structures are discussed within. I focus on their usage, key design, and sometimes problems. In the future maybe I will append all the implementation codes.


  • ADT: Abstract data type, from the point of view of a user, defined by its behavior.
  • Data Structure: from the point of view of an implementer, concrete representations of data.

Linear Data Structures

阅读全文 »

Iterable/Sequences

Strings, ranges, lists and tuples.

“An iterable which supports efficient element access using integer indices via the __getitem__ special method and defines a __len__ method that returns the length of the sequence.”

  • use one index to fetch item in a list, the index can't out of the range; but if use slice method, then you can do it out of the range, because the slice will autolly find the greediest indexs.

  • assigning a list to another list, like a = b, makes a and b refers to the same list. And a list is mutable. So if we change a, then b will also be affected. It's called alias. Do avoid this.

  • Tuple also has order. Just it's immutable.

  • Fxxxk, Tuple and Set are different things! A set is like {1, 2, 3}, that is what I thought as not ordered and not duplicated. And a set has intersection() union() difference() symmetric_difference().

    To delete items in a set:

    1
    2
    3
    set1.discard(6) # If the item doesn't exist, no exception
    set1.remove(6) # Raise an exception if doesn't exist
    set1.pop() # randomly delete one item.
  • you can insert an interable in a list's slice, though they have different length!

    1
    2
    3
    4
    >>> a = [1, 2, 3, 4, 5]
    >>> a[3:3] = [6, 7]
    >>> a
    [1, 2, 3, 6, 7, 4, 5]
  • list() takes an iterable, and makes it a list;

    str() shows you the whole object's look.

  • range() is also an iterable. It can be slicing, and len()

  • a, b = b, a: the b, a on the right firstly is packed into tuple: (b, a), then it is unpacked and individually assigned to each var on the left

阅读全文 »