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What is the difference between iterator and iterable and how to use them?
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will that matter if Iterable has interal or external iterator or it is possible to have any of them ?
– sakhunzai
Jul 2 '15 at 7:20
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Numpy argsort - what is it doing?
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a = x.argsort(), print x[a], we will get array([ 0. , 0.1 , 1.41, 1.48])
– Belter
Mar 12 '17 at 8:19
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How do you count the number of occurrences of a certain substring in a SQL varchar?
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Someone pointed out to me that this doesn't always work as expected. Consider the following: SELECT LEN('a,b,c,d ,') - LEN(REPLACE('a,b,c,d ,', ',', '')) For reasons I don't yet understand, the space between the d and the final colu...
How to make a great R reproducible example
...r for grouped tbl_df (class grouped_df) from dplyr. In these cases you can convert back to a regular data frame before sharing, dput(as.data.frame(my_data)).
Worst case scenario, you can give a text representation that can be read in using the text parameter of read.table :
zz <- "Sepal.Length ...
How do I run a simple bit of code in a new thread?
... your task is suitable for termination at any time, the flag is fine. My point was just that one needs to be careful about using the flag, since you did not describe its purpose, and its naming could easily lead one to believe that it does something else than what it actually does.
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What is the purpose of flush() in Java streams?
...on of the output stream, such bytes should immediately be written to their intended destination.
The buffering is mainly done to improve the I/O performance. More on this can be read from this article: Tuning Java I/O Performance.
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How to prevent going back to the previous activity?
...eed through of the previous activity. e.g., if you have HomeActivity -> IntermediateActivity -> FinalActivity, and you call finish() in the IntermediateActivity immediately after starting the FinalActivity you'll see the HomeActivity for a brief moment.
– David Murdoch
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What is an invariant?
...e. A function or method that ensures that the invariant holds is said to maintain the invariant.
For instance, a binary search tree might have the invariant that for every node, the key of the node's left child is less than the node's own key. A correctly written insertion function for this tree wi...
Sql Server 'Saving changes is not permitted' error ► Prevent saving changes that require table re-cr
...save it, if I try to edit the table design, like change a column type from int to real, I get this error:
16 Answers
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Python string class like StringBuilder in C#?
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It is not a premature optimization to avoid fragile, interpreter-dependant optimizations. If you ever want to port to PyPy or risk hitting one of the many subtle failure cases for the optimization, do things the right way.
– Veedrac
Nov 3 ...