mean

What does the following error mean: TopologyException: found non-nonded intersection between LINESTRING

匿名 (未验证) 提交于 2019-12-03 00:53:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm trying to fortify a shape file that I loaded into R with rgdal, but I get the following error: "Error: TopologyException: found non-noded intersection between LINESTRING (34.7279 1.59723, 34.7278 1.59729) and LINESTRING (34.7278 1.59723, 34.7278 1.59729) at 34.727793021883102 1.5972887049072426" I am using a shape file for the continent of Africa from maplibrary.org. It is available from my dropbox here: https://www.dropbox.com/s/etqdw3nky52czv4/Africa%20map.zip I am using the following code: library(rgdal) library(ggplot2) africa =

What does this mean “No DRP key due to exception:java.lang.ClassNotFoundException: com.android.webview.chromium.Drp”?

匿名 (未验证) 提交于 2019-12-03 00:52:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am trying to parse local url ( http://192.168.1.94/wamp/up.php ) to use it in my app android ( JSON parse ). mainActivity android : package itawfik.com.myapplication; import android.app.ProgressDialog; import android.os.AsyncTask; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.TextView; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader;

WebSocket Onclose Status Code 1001 meaning Going Away mean exactly

匿名 (未验证) 提交于 2019-12-03 00:52:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am using Web Sockets in my Application While onclose event , i am getting the status code as 1001 As per this web site , the status code 1001 means Going Away WebSockets Status Codes Please let me know what does the Status 1001 meaning (Going Away) mean exactly Please let me know , thanks in advance . 回答1: From RFC 6455 : 1001 indicates that an endpoint is "going away", such as a server going down or a browser having navigated away from a page. 文章来源: WebSocket Onclose Status Code 1001 meaning Going Away mean exactly

In Mathematica, what does @@@ mean?

匿名 (未验证) 提交于 2019-12-03 00:52:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I've been working through problems on Project Euler , and some of the solutions that other people have posted use a triple-at-sign, i.e. '@@@'. In the help browser for v7, I find an entry for @@ (which says it's the infix version of 'Apply') but none for @@@. What does it mean? EDIT: Here's an example, which I think I can post without violating the spirit of Project Euler: bloc[n_, f_][t_] := {f @@@ #, #~Tr~f} & /@ Join @@ Partition[t, {n, n}, 1]; 回答1: As others have noted, @@@ is, technically, shorthand for Apply with an optional third

aggregation with data.table in R

匿名 (未验证) 提交于 2019-12-03 00:50:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: The exercise consists in aggregating a numeric vector of values by a combination of factors with data.table in R. Take the following data table as example: require (data.table) require (plyr) dtb <- data.table (cbind (expand.grid (month = rep (month.abb[1:3], each = 3), fac = letters[1:3]), value = rnorm (27))) Notice that every unique combination of 'month' and 'fac' shows up three times. So, when I try to average values by both these factors, I should expect a data frame with 9 unique rows: (agg1 <- ddply (dtb, c ("month", "fac"), function

What does this error mean? The remote host closed the connection. The error code is 0x80070057

匿名 (未验证) 提交于 2019-12-03 00:50:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Even though a couple people have asked this question it seems there problem is different than mine. Like most of them seem to get line numbers or the problem might be caused with ViewState. I am using Asp.net 4.0 MVC 2.0 so I don't think I am using ViewState at all. My error does not give me line numbers are well. So I have no clue what is causing it or where in my code. System.Web.HttpException (0x80070057): The remote host closed the connection. The error code is 0x80070057. at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError

What does “exposition only” mean? Why use it?

匿名 (未验证) 提交于 2019-12-03 00:46:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: All over boost.org and also at other sites on the web I've seen code of this form: class whatever { ... private: std::vector<std::string> m_name; // exposition only }; What is the meaning of "exposition only"? What is the comment's purpose? What is it trying to tell me? 回答1: It's used to indicate one possible way to implement the particular item, but not necessarily the best or recommended way. 回答2: One of the definitions of "exposition" is: the act of expounding, setting forth, or explaining So I think they are saying that the private

What does (idle) mean in Google Chrome DevTools Profiler?

匿名 (未验证) 提交于 2019-12-03 00:46:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Probably it's obvious but I can't find an answer.. What's the exact meaning of idle in this case? Is there really nothing going on? Or just no JavaScript getting parsed/executed? 回答1: The meaning of "idle" is really obvious: "(idle)" means the time spent on doing nothing . Go to about:blank , and get a new CPU profile. The result is probably a value for (idle) close to 100% and a bit of (program) next question: Chrome debugger - What is "(program)" in the profiler? . 文章来源: What does (idle) mean in Google Chrome DevTools Profiler?

MEAN app with admin panel and client panel

匿名 (未验证) 提交于 2019-12-03 00:45:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have a mean app which is working perfect with admin panel. My server is listening on: http://localhost:3003 admin panel I can access here: http://localhost:3003/#/admin/ Now I want to separate admin panel and client panel, but client panel is not accessible like when I tried to this url, show nothing http://localhost:3003/#/client I have updated my server.js file also enable multiple views in express v 10.x.x like: app.set('views', [__dirname + '/admin/views', __dirname + '/client/views']); I think problem is with app.get('/', function

What does this mean? LEN(TRIM(Weight)) == 0 ? (DT_STR,50,1252)NULL(DT_STR,50,1252) : (DT_STR,50,1252)Weight

匿名 (未验证) 提交于 2019-12-03 00:44:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Here's an expression for a derived column "ReplaceWeight" LEN(TRIM(Weight)) == 0 ? (DT_STR,50,1252)NULL(DT_STR,50,1252) : (DT_STR,50,1252)Weight I'm unclear about the syntax of the True portion of this IF statement... I read this as "If the length of the trimmed column 'Weight' is zero, assign the derived column ReplaceWeight the a NULL value of type string?? ELSE convert the Weight column to a string and assign this value to the derived column" The expression builder shows me that NULL(DT_STR,50,1252) ...returns a NULL value of the