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JavaScript checking for null vs. undefined and difference between == and ===
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T.J. CrowderT.J. Crowder
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Linear Regression and group by in R
...oing for loop for each state then doing the regression inside the loop and adding the results of each regression to a vector. That does not seem very R-like, however. In SAS I would do a 'by' statement and in SQL I would do a 'group by'. What's the R way of doing this?
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JSON left out Infinity and NaN; JSON status in ECMAScript?
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olliejolliej
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29...
In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
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Use whatever you and your team find the most readable.
Other answers have suggested that a new string is created every time you use "". This is not true - due to string interning, it will be created either once per assembly or once per AppDomain (or possibly once for the...
JSON datetime between Python and JavaScript
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You can add the 'default' parameter to json.dumps to handle this:
date_handler = lambda obj: (
obj.isoformat()
if isinstance(obj, (datetime.datetime, datetime.date))
else None
)
json.dumps(datetime.datetime.now(), defaul...
Multiple select statements in Single query
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DanB
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answered Nov 21 '09 at 11:46
sathishsathish
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How to add a button to PreferenceScreen
Is there any way to add a button to the bottom of preferences screen and make them work correct when scrolling?
12 Answers
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How to add \newpage in Rmarkdown in a smart way?
...ssumes you are knitting PDF. For HTML, you can achieve a similar effect by adding a tag <P style="page-break-before: always">. Note that you likely won't see a page break in your browser (HTMLs don't have pages per se), but the printing layout will have it.
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How does the Google “Did you mean?” Algorithm work?
...eryone start to spell night as "nigth" google would suggest that word instead.
EDIT
@ThomasRutter: Douglas describe it as "statistical machine learning".
They know who correct the query, because they know which query comes from which user ( using cookies )
If the users perform a query, and o...
Java: How to test methods that call System.exit()?
...ese cases causes JUnit to terminate! Putting the method calls in a new Thread doesn't seem to help, since System.exit() terminates the JVM, not just the current thread. Are there any common patterns for dealing with this? For example, can I subsitute a stub for System.exit() ?
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