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AsyncTask threads never die
...ges a thread pool, created with ThreadPoolExecutor. It will have from 5 to 128 threads. If there are more than 5 threads, those extra threads will stick around for at most 10 seconds before being removed. (note: these figures are for the presently-visible open source code and vary by Android release...
Removing all unused references from a project in Visual Studio projects
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Change Image of ImageView programmatically in Android
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183
That happens because you're setting the src of the ImageView instead of the background.
Use t...
vim - How to delete a large block of text without counting the lines?
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How can I write a regex which matches non greedy? [duplicate]
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edited Jul 18 '17 at 16:10
Peter Mortensen
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Combine two or more columns in a dataframe into a new column with a new name
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132
Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb...
Implications of foldr vs. foldl (or foldl')
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175
The recursion for foldr f x ys where ys = [y1,y2,...,yk] looks like
f y1 (f y2 (... (f yk x) ...
ValueError: invalid literal for int() with base 10: ''
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