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R语言入门:向量的运算
向量之间的加减乘除运算: > x <- 1 > x [1] 1 2 3 4 5 6 7 8 9 10 > x=x+1 > x [1] 2 3 4 5 6 7 8 9 10 11 > x = 1:10 > x [1] 1 2 3 4 5 6 7 8 9 10 > y = seq(1,100, leng ...
分类:编程语言   时间:2020-02-27 12:55:37    阅读次数:516
139. Word Break
Problem : Given a non empty string s and a dictionary wordDict containing a list of non empty words, determine if s can be segmented into a space sepa ...
分类:其他好文   时间:2020-02-21 22:20:48    阅读次数:70
Find a multiple POJ - 2356
The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000. This numbers are not nece ...
分类:其他好文   时间:2020-02-21 20:07:51    阅读次数:74
No qualifying bean of type '***' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations:
搭建spring mvc项目的dao层之后,经常出现这样的错误。一般是由于spring 扫描时候 没有配置具体的目录,或者配置了但是包名不对造成的。但是今天自己出这个问题,找了半天没找到哪里出问题。 最后仔细看配置文件,发现是自己的applicationContext-springmvc.xml一处 ...
分类:其他好文   时间:2020-02-21 17:42:11    阅读次数:71
1354. Construct Target Array With Multiple Sums
Given an array of integers target. From a starting array, A consisting of all 1's, you may perform the following procedure : let x be the sum of all e ...
分类:其他好文   时间:2020-02-21 14:50:39    阅读次数:75
【Course】Machine learning:Week 2-Lecture1-Gradient Descent For Multiple Variables
Gradient Descent For Multiple Variables 问题提出:Week2的梯度下降问题由单一变量转变成了多变量: 相应的公式如下: 梯度下降算法 $$ \begin{array}{l}{\text { repeat until convergence: }\{} \\ { ...
分类:系统相关   时间:2020-02-20 22:12:11    阅读次数:76
[Javascript] Wait for Multiple JavaScript Promises to Settle with Promise.allSettled()
The Promise.allSettled() method accepts an array (or any other iterable) of promises as a parameter. It returns a Promise object that is fulfilled wit ...
分类:编程语言   时间:2020-02-20 18:45:55    阅读次数:87
body标签之textarea与select标签
1、textarea标签 多行文本标签,可以输入多行,默认值写在标签中奖 <textarea name="meno">123456</textarea> 2、select标签 select设置下拉框,size为下拉框的尺寸,multiple按住ctrl键可以多选 <select name="city ...
分类:其他好文   时间:2020-02-18 18:30:24    阅读次数:80
SLF4J: Class path contains multiple SLF4J bindings.警告解决
SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/G:/repo/repo-mvn-qingmu/ch/qos/logback/logback-classic/1.2.3/lo ...
分类:其他好文   时间:2020-02-15 18:53:08    阅读次数:112
A. DZY Loves Chessboard
DZY loves chessboard, and he enjoys playing with it. He has a chessboard of n rows and m columns. Some cells of the chessboard are bad, others are goo ...
分类:其他好文   时间:2020-02-14 18:35:30    阅读次数:49
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