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How to concatenate strings with padding in sqlite
...o such function: printf Unable to execute statement select printf('%s.%s', id, url ) from mytable limit 7. My version is 3.8.2 2014-12-06. What version are you using?
– Berry Tsakala
Nov 2 '14 at 15:10
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Load data from txt with pandas
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if you want to call a column use data.a if you named the column "a".
– pietrovismara
Feb 4 '14 at 8:01
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How to change the background color of a UIButton while it's highlighted?
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Why nobody had mentioned that the setter is being called only when you tap the button, but not during the initial layout! So by default there is no colour until you touch the button. So to make it work you also need to explicitly call isHighlighted = false somewhere in the b...
How to use timeit module
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The way timeit works is to run setup code once and then make repeated calls to a series of statements. So, if you want to test sorting, some care is required so that one pass at an in-place sort doesn't affect the next pass with already sorted data (that, of course, would make the Timsort real...
Why do you not use C for your web apps?
...t on the web. If you need more scalability, most organizations can economically just throw more cores at the problem and be fine. This is not true for everyone, of course. I'd imagine that the core of Google's engine is written in C or a similar language not only for speed, but to save real money...
Appending to an empty DataFrame in Pandas?
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Thank you! That worked! I didn't realize that I had to store the output... I probably should have read the documentation better, but I appreciate it, @DSM!
– ericmjl
May 16 '13 at 21:06
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A weighted version of random.choice
...g, this is an order of magnitude slower than random.choices for individual calls. If you need a lot of random results, it's really important to pick them all at once by adjusting number_of_items_to_pick. If you do so, it's an order of magnitude faster.
– jpmc26
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How do I execute a Git command without being in the repository?
...and not to the subcommand (as correctly done by @calandoa in this answer). Calling git -C /some/dir add . would work as expected while git add -C /some/dir . would throw an error. Just something to be aware of to prevent confusing results.
– Paul van Leeuwen
Ma...
How to pass all arguments passed to my bash script to a function of mine? [duplicate]
...diff through sort and then passing all other arguments to diff, so you can call it similarly to diff:
diffs file1 file2 [other diff args, e.g. -y]
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When to use an interface instead of an abstract class and vice versa?
...blic methods of the base class, even though most times it does not need to call them.
(Overly simplified) example:
abstract class QuickSorter
{
public void Sort(object[] items)
{
// implementation code that somewhere along the way calls:
bool less = compare(x,y);
//...