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How can I switch my signed in user in Visual Studio 2013?
...ign in with a Microsoft Account and have your settings be persisted across all of your instances of Visual Studio, amongst other things.
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Why wasn't PyPy included in standard Python?
...e JIT compilation and lower memory footprint greatly improve the speeds of all Python code?
6 Answers
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What's the difference between the 'ref' and 'out' keywords?
...c to out is that the function has to assign to the out parameter. It's not allowed to leave it unassigned.
– Daniel Earwicker
Dec 23 '08 at 11:30
7
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What is meaning of boolean value returned from an event-handling method in Android
... in the rest of the events in that gesture. A "gesture" in this case means all events until the final ACTION_UP or ACTION_CANCEL. Returning false from an ACTION_DOWN means you do not want the event and other views will have the opportunity to handle it. If you have overlapping views this can be a si...
New to unit testing, how to write great tests? [closed]
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My tests just seems so tightly bound to the method (testing all codepath, expecting some inner methods to be called a number of times, with certain arguments), that it seems that if I ever refactor the method, the tests will fail even if the final behavior of the method did not change...
Visual Studio 2013 hangs when opening a solution
I installed VS2013 (v12.0.21005.1) and added ReSharper 8 (v8.0.2000.2660) a day or two ago. That day it was fine. Now I'm lucky if I can get it to open one solution in a whole day. It opens OK by itself, but when I try and open a solution from within - via the menu - it hangs, badly. If I right-clic...
Support for “border-radius” in IE
...es! When IE9 is released in Jan 2011.
Let's say you want an even 15px on all four sides:
.myclass {
border-style: solid;
border-width: 2px;
-moz-border-radius: 15px;
-webkit-border-radius: 15px;
border-radius: 15px;
}
IE9 will use the default border-radius, so just make sure you include th...
Most efficient way to check for DBNull and then assign to a variable?
This question comes up occasionally, but I haven't seen a satisfactory answer.
15 Answers
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Pass a data.frame column name to a function
...l_name,col1,col2){
df$col_name <- df$col1 + df$col2
df
}
#Call foo() like this:
foo(dat,z,x,y)
The problem here is that df$col1 doesn't evaluate the expression col1. It simply looks for a column in df literally called col1. This behavior is described in ?Extract under the secti...
How do I create and read a value from cookie?
...e nice to have an option to leave the expiry date unset though. This would allow the cookie to be automatically deleted upon browser exit.
– xji
Oct 23 '18 at 14:55
4
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