#### 入门 Linux 之 从命令行开始

2018-03-08 23:13:18    学习笔记Linux   716 阅读   0条回复

#### LeetCode刷题之5：Longest Substring Without Repeating Characters（3）

2018-02-07 14:42:19    学习笔记数据结构和算法   451 阅读   0条回复

1. 题目1.1 英文Given a string, find the length of the longest substring without repeating characters. Examples: Given "abcabcbb", the answer is "abc", which the length is 3. Given "bbbbb", the answer is "b", with the length of 1. Given "pwwkew", the answer is "wke&quo...

#### LeetCode刷题之4：Valid Parentheses（20）

2018-02-06 14:42:19    学习笔记数据结构和算法   367 阅读   0条回复

1. 题目1.1 英文Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]" are no...

#### LeetCode刷题之3：Palindrome Number（9）

2018-02-01 17:01:37    学习笔记数据结构和算法   278 阅读   0条回复

1. 题目1.1 英文Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1)If you are thinking of converting the integer to string, note the restriction of using extra space.You could also try reversing an integer. However, if you have solved the p...

#### LeetCode刷题之2：Reverse Integer（7）

2018-01-25 15:41:53    学习笔记数据结构和算法   308 阅读   0条回复

1. 题目Given a 32-bit signed integer, reverse digits of an integer. Example 1:Input: 123Output: 321 Example 2:Input: -123Output: -321 Example 3:Input: 120Output: 21 Note:Assume we are dealing with an environment which could only hold integers within the 32-bit signed integer range. For the purpose of this problem, assume...

#### Go语言内置类型和函数

2018-01-24 17:34:58    学习笔记Golang   258 阅读   0条回复

Go语言中，有一些内置的类型和函数，不需要导入任何东西就可以使用，包括一些内置函数，初学Go，这些函数花几分钟记一记。官方参考资料：Package builtin 1. 内置类型 ConstantsVariablestype ComplexTypetype FloatTypetype IntegerTypetype Typetype Type1type booltype bytetype complex128type complex64type errortype float32type float64type ...

#### LeetCode刷题之1：Two Sum（1）

2018-01-24 14:17:34    学习笔记数据结构和算法   212 阅读   0条回复

#### 数据结构的基本概念

2018-01-23 14:43:04    学习笔记数据结构和算法   462 阅读   0条回复

#### PHP正则表达式的应用

2017-07-13 14:35:18    学习笔记PHP   445 阅读   0条回复

#### serialize序列化和json的比较

2017-01-05 11:21:48    学习笔记PHP   203 阅读   0条回复