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getActionBar() returns null

...ionBar() instead of getActionBar() * Update: The class ActionBarActivity now is deprecated: import android.support.v7.app.ActionBarActivity; I recommend to use: import android.support.v7.app.AppCompatActivity share ...
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How does Java handle integer underflows and overflows and how would you check for it?

...eld a negative value, so an overflow occurs if arg1 + arg2 > MAX_VALUE. Now the maximum value that could result would be MAX_VALUE + MAX_VALUE (the extreme case both arguments are MAX_VALUE). For a byte (example) that would mean 127 + 127 = 254. Looking at the bit representations of all values th...
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np.mean() vs np.average() in Python NumPy?

... already noted, there's another extremely important difference that I just now discovered the hard way: unlike np.mean, np.average doesn't allow the dtype keyword, which is essential for getting correct results in some cases. I have a very large single-precision array that is accessed from an h5 f...
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How to import multiple .csv files at once?

...mp<-list.files(pattern="*.csv") ddives <- lapply(temp, read.csv) So now each file is called ddives[n] but how would I go about writing a loop to make them all data frames rather than single objects? I can achieve this individually using the data.frame operator but am unsure as to how to loop ...
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Split string into an array in Bash

... @l0b0: Thanks. I don't know what I was thinking. I like to use declare -p array for test output, by the way. – Paused until further notice. May 14 '12 at 16:33 ...
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What is the default height of UITableViewCell?

...properties in the Inspector window. I do not have my MacBook with me right now so I cannot check. But if you don't get a better answer from someone, that is how you can check for yourself. share | i...
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Find out whether radio button is checked with JQuery?

...) alert('is checked'); alert('check-checky-check was changed'); }); Now when you programmatically change the state, you have to trigger this event also: $('#radio_button').attr("checked", "checked"); $('#radio_button').click(); ...
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Infinity symbol with HTML

... Now this is the first page that comes up when you google the question. – whitebeard Jul 23 '15 at 11:25 ...
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Convert string to number and add one

...menter on a second line to be more compact. – Chris Snowden Oct 6 '11 at 13:04 ...
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Set Background color programmatically [duplicate]

...oing white and black, but for basically any other color it's necessary to know this information. – aroth Aug 19 '16 at 5:25 1 ...