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Changing column names of a data frame
...as in q1 <- q1 %>% mutate(rel_count = count / 482462) results in the error Error in mutate_impl(.data, dots) : unknown column 'days' (where days is a new name given to the column). This is really frustrating.
– David Tonhofer
Feb 7 '17 at 21:19
...
ImportError: No module named six
... trying to build OpenERP project, done with dependencies. It's giving this error now
7 Answers
...
Using {} in a case statement. Why?
... return a * x;
case 1337:
int x = GetSomeOtherValue(); //ERROR
return a * x;
}
You will get a compiler error because x is already defined in the scope.
Separating these to their own sub-scope will eliminate the need to declare x outside the switch statement.
switch (a)
...
(Mac) -bash: __git_ps1: command not found
I'm trying to change my command promt in terminal. I keep getting the error:
19 Answers
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New features in java 7
...tiple exception catching
this:
} catch (FirstException ex) {
logger.error(ex);
throw ex;
} catch (SecondException ex) {
logger.error(ex);
throw ex;
}
becomes:
} catch (FirstException | SecondException ex) {
logger.error(ex);
throw ex;
}
SafeVarargs
this:
@Suppre...
Infinite Recursion with Jackson JSON and Hibernate JPA issue
...rialized, in order to avoid the infite loop that causes your stackoverflow error.
So, Jackson takes the forward part of the reference (your Set<BodyStat> bodyStats in Trainee class), and converts it in a json-like storage format; this is the so-called marshalling process. Then, Jackson looks ...
No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClie
...ading the EF6 by nuget and try to run my project, it returns the following error:
34 Answers
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What is the reason for a red exclamation mark next to my project in Eclipse?
...stly for built problems only. See here for more details. It is about built error decorater seen in eclipse.
An extract from that page:
Build path problems are sometimes easy to miss among other problems in
a project. The Package Explorer and Project Explorer views now show a
new decorator o...
Could not establish trust relationship for SSL/TLS secure channel — SOAP
...CertificateValidationCallback =
((sender, certificate, chain, sslPolicyErrors) => true);
// trust sender
System.Net.ServicePointManager.ServerCertificateValidationCallback
= ((sender, cert, chain, errors) => cert.Subject.Contains("YourServerName"));
// validate cert by ca...
String comparison in bash. [[: not found
...
The error is expected when you run the script via sh myscript.sh, because /bin/sh emulates a Bourne shell where [[ is not a builtin. However, running the script via ./script.sh should not yield an error, because in that case the ...