difference

问题 What is exactly the difference between Classes and Namespaces in Typescript? I know that if you create a class with static methods you can access them without instantiate the class and that is exactly one of the points of namespaces I guess. I also know that you can create more than one Namespace with the same name and their methods will belong to the same function when compiled to JS. But I cant figure out when to use one or another...for me, at the end, classes and namespaces are almost the

问题 What is the difference between using a symfun and an anonymous function in Matlab? Which one is better i.e. faster? It seems like, I can use both for symbolic and real numbers. Here they discuss the difference between inline and anonymous functions, but don't mention symfun. 回答1: Basic MATLAB functionality is designed for numerical calculations, i.e. working with floating-point numbers. By default MATLAB variables and functions are numeric, and this is why in your linked discussion only

问题 I've been reading and trying to comprehend the differences in browser side security. From what I gather, SSL is used to keep people from sniffing the traffic you send to the server. This allows you to send a password to a server in clear text...right? As long as you are in an SSL encrypted session you don't have to worry about hashing the password first or anything weird, just send it straight to the server along with the username. After the user authenticates you send them back a JWT and

问题 Below is my code for loading csv data into dataframe and applying the difference on two columns and appending to a new one using withColumn.The two columns I am trying to find the difference is of kind Double. Please help me in figuring out the following exception: import org.apache.log4j.{Level, Logger} import org.apache.spark.sql.SparkSession /** * Created by Guest1 on 5/10/2017. */ object arith extends App { Logger.getLogger("org").setLevel(Level.ERROR) Logger.getLogger("akka").setLevel

问题 I made a plot for my data and am now I would like to have the difference in y for every x that was estimated by geom_smooth(). There is a similiar question which unfortunately has no answer. For example, how to get the differences for the following plot (data below): EDIT Two suggestions were made but I still don't know how to calculate the differences. First suggestion was to access the data from the ggplot object. I did so with pb <- ggplot_build(p) pb[["data"]][[1]] That approach kind of

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . My client want me to implement ETL process using Alteryx as they have a license of it. I am confused whether the Alteryx is an ETL tool or not. I believe that Alteryx is commonly used to prepare data for Tableau data visualization tool. Please advise whether its an ETL tool or not? How it differs from SSIS?

问题 Are there any differences between SupportMapFragment and MapFragment? In the reference it says that you should only use MapFragment when you target Android API level 12 and higher, but are there any other differences? Is one of them faster? 回答1: Are there any differences between SupportMapFragment and MapFragment? One begins with the word "Support". :-) Beyond that, MapFragment inherits from android.app.Fragment , which SupportMapFragment inherits from android.support.v4.app.Fragment . In the

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . Can you help me understand the differences for Telegram API vs Bot API please, I tried telegram website but just get confused? Thanks Ramin 回答1: Telegram APIs This API allows you to build your own customized Telegram clients. It is 100% open for all developers who wish to create Telegram applications on our

问题 I would like to calculate the diff of variables in a data table, grouped by id. Here is some sample data. The data is recorded at a sample rate of 1 Hz. I would like to estimate the first and second derivatives (speed, acceleration) df <- read.table(text='x y id 1 2 1 2 4 1 3 5 1 1 8 2 5 2 2 6 3 2',header=TRUE) dt<-data.table(df) Expected output # dx dy id # NA NA 1 # 1 2 1 # 1 1 1 # NA NA 2 # 4 -6 2 # 1 1 2 Here's what I've tried dx_dt<-dt[, diff:=c(NA,diff(dt[,'x',with=FALSE])),by = id]

问题 Update: The p-values and S.E.'s are similar between SPSS and R if I change the parameter estimation method in SPSS to 'Hybrid' and the scale parameter method to 'Pearson Chi-square'. Does anyone now how to change these settings in R and what these settings actually mean? I am trying to perform an GLM with a gamma log link function in R, to analyse a multiple imputation dataset. However, when I compare the results from the same analysis in R and SPSS they are very different. This example is in