find nan

I believe many beginner JavaScript will have this idea: why JavaScript is null and undefined, relative to C, C + +, Java, they are all just null, why JavaScript is differentOne, historical reasons The web search learned that,when JavaScript was born

This article mainly introduces how to judge null, undefined, and NaN in JS. If you need it, you can refer to the following str = "s" ++; Then Nan appears. Find it for a while. The collected data is judged as follows: 1. Determine undefined: The

0. GreetingTurn over their own blog, the last one is June 26, said the update? Review just past this July, all day is the company's induction training plus their own small papers, every day to fight to 1 o'clock in the morning more, this is to hang

? ? For example, we have a set of data, there are a lot of Nan value, how to delete it? Can be done by the find function.?? We can import the data file Data.txt into array A by importdata (' Data.txt '). ? ? ? ? ? ? ? ? ? ? ? ??? A=importdata ('

Distinguish underfined, null, and Nan First, let's look at the running result of the following statement: 1: VaRA; 2:Alert ();// Display "undefined" 3:Alert (TypeofA );// Display "undefined" 4:Alert (B); // display"Undefined" The value

Str = "s" ++;Then Nan appears. Find it for a while.The collected data is judged as follows:1. Determine undefined:Copy codeThe Code is as follows: var tmp = undefined;If (typeof (tmp) = "undefined "){Alert ("undefined ");} Note: typeof returns a

 Author: Junsan.jinEmail: junsanjin@gmail.comqq:1305896503 This article original address: http://www.rsky.com.cn/Article/java/201005/11748.htmlWelcome to reprint, please retain the author information, thank you. Recent projects using

Original source: http://blog.csdn.net/oscar999/article/details/9353713JS data type before you introduce the differences between the three, take a look at the JS data type. In a language like Java, C, before using a variable, you need to define the

Recently, using BP neural network for text categorization, the generated text vector matrix contains "NaN" data, which causes the network to be unable to converge. Now we finally find out why, Mainly because in the calculation of division

Chapter One: The deep interpretation of "the ways of the Ways"    Deep interpretation of "the way of the people", let you escape the life of the three obstacles door, understand the true meaning of love "cross", learn to get along with people, "to