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Booleans, conditional operators and autoboxing
Why does this throw NullPointerException
4 Answers
4
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What are the pros and cons of performing calculations in sql vs. in your application
... depends on a lot of factors - but most crucially:
complexity of calculations (prefer doing complex crunching on an app-server, since that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot of data, doing it at the db server will save bandwi...
How to store int[] array in application Settings
... <Value Profile="(Default)" />
</Setting>
Change the "Type" param from System.String to System.Int32[]. Now this section will look like this:
<Setting Name="SomeTestSetting" Type="System.Int32[]" Scope="User">
<Value Profile="(Default)" />
</Setting>
Now save ch...
Could not open a connection to your authentication agent
...the contents
ForwardAgent yes
In the original tutorial the ForwardAgent param is Yes, but it's a typo. Use all lowercase or you'll get errors.
Restart Msysgit. It will ask you to enter your passphrase once, and that's it (until you end the session, or your ssh-agent is killed.)
Mac/OS X
If you...
How can I tell if a DOM element is visible in the current viewport?
...ers. This technique is no longer recommended and you should use Dan's solution if you do not need to support version of Internet Explorer before 7.
Original solution (now outdated):
This will check if the element is entirely visible in the current viewport:
function elementInViewport(el) {
var...
How to load a tsv file into a Pandas DataFrame?
...stead, i used read_table(), which worked much faster and without the extra param.
– Yurik
Aug 15 '14 at 9:56
...
Rails Observer Alternatives for 4.0
...stsController < ApplicationController
def create
@post = Post.new(params[:post])
@post.subscribe(PusherListener.new)
@post.subscribe(ActivityListener.new)
@post.subscribe(StatisticsListener.new)
@post.on(:create_post_successful) { |post| redirect_to post }
@post.on(:cr...
How should I read a file line-by-line in Python?
...on's relatively deterministic reference-counting scheme for garbage collection. Other, hypothetical implementations of Python will not necessarily close the file "quickly enough" without the with block if they use some other scheme to reclaim memory.
In such an implementation, you might get a "too...
Change date format in a Java string
...DateFormat; import java.util.Date; public class formateDate { /** * @param args * @throws ParseException */ public static void main(String[] args) throws ParseException { // TODO Auto-generated method stub String date_s=" 2011-01-18 00:00:00.0"; SimpleDateFormat dt= new SimpleDate...
Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
... String.Concat in Reflector, you'll see it:
// while looping through the parameters
strArray[i] = (str == null) ? Empty : str;
// then concatenate that string array
(MSDN mentions it, too: http://msdn.microsoft.com/en-us/library/k9c94ey1.aspx)
On the other hand, ToString() is an instance meth...