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Select multiple columns in data.table by their numeric indices
How can we select multiple columns using a vector of their numeric indices (position) in data.table ?
5 Answers
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Find running median from a stream of integers
Solution I have read: We can use a max heap on left side to represent elements that are less than the effective median, and a min heap on right side to represent elements that are greater than the effective median.
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Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
Java doesn't allow multiple inheritance, but it allows implementing multiple interfaces. Why?
18 Answers
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Get city name using geolocation
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You would do something like that using Google API.
Please note you must include the google maps library for this to work. Google geocoder returns a lot of address components so you must make an educated guess as to which one will have the...
`Apache` `localhost/~username/` not working
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Looks like you need to uncomment the following:
#LoadModule userdir_module libexec/apache2/mod_userdir.so
and
#Include /private/etc/apache2/extra/httpd-userdir.conf
Then in httpd-userdir.conf you may need to uncomment:
#Include /private/etc/apach...
How can I check for “undefined” in JavaScript? [duplicate]
...peof theFu; // "undefined"
But this may not be the intended result for some cases, since the variable or property was declared but just not initialized. Use the in operator for a more robust check.
"theFu" in window; // true
"theFoo" in window; // false
If you are interested in knowing whether ...
Setting href attribute at runtime
...s the best way to set the href attribute of the <a> tag at run time using jQuery?
5 Answers
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How do I convert a Ruby class name to a underscore-delimited symbol?
How can I programmatically turn a class name, FooBar , into a symbol, :foo_bar ? e.g. something like this, but that handles camel case properly?
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Is there an advantage to use a Synchronized Method instead of a Synchronized Block?
Can any one tell me the advantage of synchronized method over synchronized block with an example?
23 Answers
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Find nearest value in numpy array
...wrong answer. This gives you the min of the absolute value distance, and somehow we need to return the actual array value. We could add value and come close, but the absolute value throws a wrench into things...
– unutbu
Apr 2 '10 at 18:51
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