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Why are these constructs using pre and post-increment undefined behavior?
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C has the concept of undefined behavior, i.e. some language constructs are syntactically valid but you can't predict the behavior when the code is run.
As far as I know, the standard doesn't explicitly say why the concept of undefined behavior exists. In my mind, it's sim...
Why would iterating over a List be faster than indexing through it?
Reading the Java documentation for the ADT List it says:
5 Answers
5
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HTML table with fixed headers?
...(this).width($(this).attr("data-item-original-width"));
});
}
$(document).ready(function() {
scrolify($('#tblNeedsScrolling'), 160); // 160 is height
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<div style="width:300px;bor...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...eturns empty list [], while ''.split('\n') returns [''].
The str.split() method has two algorithms. If no arguments are given, it splits on repeated runs of whitespace. However, if an argument is given, it is treated as a single delimiter with no repeated runs.
In the case of splitting an empty...
Can dplyr package be used for conditional mutating?
...f_else is stricter than ifelse (both legs of the condition must have the same type) so the NA in that case would have to be replaced with NA_real_ .
df %>%
mutate(g = if_else(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
if_else(a == 0 | a == 1 | a == 4 | a == 3 | c == 4,...
Is Ruby pass by reference or by value?
...object adds errors to the lang_errors variable in the update_lanugages method.
when I perform a save on the @user object I lose the errors that were initially stored in the lang_errors variable.
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Strip HTML from strings in Python
...L file, I'm trying to find a way to only show the contents of each HTML element and not the formatting itself. If it finds '<a href="whatever.com">some text</a>' , it will only print 'some text', '<b>hello</b>' prints 'hello', etc. How would one go about doing this?
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Choice between vector::resize() and vector::reserve()
I am pre-allocating some memory to my a vector member variable. Below code is minimal part
4 Answers
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How to make an Android Spinner with initial text “Select One”?
...o work in future OS updates. It seems likely that it will, but it is by no means guaranteed.
Normally I wouldn't condone something like this, but this question has been asked enough times and it seems like a reasonable enough request that I thought I would post my solution.
/**
* A modified Spinn...
How to reliably open a file in the same directory as a Python script
I used to open files that were in the same directory as the currently running Python script by simply using a command like
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