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dplyr: “Error in n(): function should not be called directly”
... then run solution in detach("package:plyr", unload=TRUE)
Blog : https://www.analyticsvidhya.com/blog/2017/09/comparative-stock-analysis/
Master_Data_AutoCorrelations<-Master_Data_lags %>%
gather(key = "lag", value = "lag_value", -c(Stock,Date, Close)) %>%
mutate(lag = str_sub(lag, s...
Looking for files NOT owned by someone
...en provided:
$ find / -nouser
You can use it like so:
$ sudo find /var/www -nouser -exec chown root:apache {} \;
And a related one:
$ find / -nogroup
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What is database pooling?
...commons.apache.org/dbcp/
DBCP is also a supported Hibernate pool : http://www.informit.com/articles/article.aspx?p=353736&seqNum=4
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Patterns for handling batch operations in REST web services?
...idual request.
Example: (taken from their docs)
Request:
POST https://www.googleapis.com/batch
Accept-Encoding: gzip
User-Agent: Google-HTTP-Java-Client/1.20.0 (gzip)
Content-Type: multipart/mixed; boundary=END_OF_PART
Content-Length: 963
--END_OF_PART
Content-Length: 337
Content-Type: applic...
Import / Export database with SQL Server Server Management Studio
... Server 2008 Management Studio Express from the Microsoft web site: http://www.microsoft.com/en-us/download/details.aspx?id=7593
After Microsoft SQL Server Management Studio Express has been installed, launch the application to connect to the system database. The "Connect to Server" dialog box displ...
Default visibility of class methods in PHP
...ed without any explicit visibility keyword are defined as public.
http://www.php.net/manual/en/language.oop5.visibility.php
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Semantic Diff Utilities [closed]
...ped a tool that is able to precisely deal with this scenario. Check http://www.semanticmerge.com
It merges (and diffs) based on code structure and not using text-based algorithms, which basically allows you to deal with cases like the following, involving strong refactor. It is also able to render ...
How to ignore the certificate check when ssl
... as well. This method appears to require .NET 4.5.
String url = "https://www.stackoverflow.com";
HttpWebRequest request = HttpWebRequest.CreateHttp(url);
request.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
In .NET 4.0, the Lambda Expression ca...
Positioning a div near bottom side of another div
...TYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html><body>
<div style='background-color: yellow; width: 70%;
height: 100px; position: relative;'>
Outer
<div style='background-color: green;
...
Why is arr = [] faster than arr = new Array?
...maintain the correct order of arguments passed to functions, etc.
http://www.dyn-web.com/tutorials/obj_lit.php
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