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Drop all duplicate rows across multiple columns in Python Pandas
... pass is take_last=True or take_last=False , while I would like to drop all rows which are duplicates across a subset of columns. Is this possible?
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MySQL Data - Best way to implement paging?
... (not 1):
SELECT * FROM tbl LIMIT 5,10; # Retrieve rows 6-15
To retrieve all rows from a certain offset up to the end of the result set, you can use some large number for the second parameter. This statement retrieves all rows from the 96th row to the last:
SELECT * FROM tbl LIMIT 95,1844674407370...
How to check if an element does NOT have a specific class?
... that don't have a certain class, you can use the not selector:
// select all divs that don't have class test
$( 'div' ).not( ".test" );
$( 'div:not(.test)' ); // <-- alternative
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impr...
Awaiting multiple Tasks with different results
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After you use WhenAll, you can pull the results out individually with await:
var catTask = FeedCat();
var houseTask = SellHouse();
var carTask = BuyCar();
await Task.WhenAll(catTask, houseTask, carTask);
var cat = await catTask;
var house =...
Uses for Optional
...tween wanting to use it everywhere something may be null , and nowhere at all.
14 Answers
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git ignore exception
...have a gitignore file that makes git ignore *.dll files, and that is actually the behavior I want. However, if I want an exception ( i.e. to be able to commit foo.dll ), how can I achieve this?
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How to check if an object is nullable?
...pe if boxed, but you can with generics:
- so how about below. This is actually testing type T, but using the obj parameter purely for generic type inference (to make it easy to call) - it would work almost identically without the obj param, though.
static bool IsNullable<T>(T obj)
{
if (...
How to fix “Incorrect string value” errors?
... @Brian: If you tell it you're giving it cp1252, and you actually give it the UTF-8 for, say, café, it's going to misinterpret that as café. It won't crash, but it will misunderstand the high-bit characters.
– RichieHindle
Jul 22 '09 at 21:36
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Access Enum value using EL with JSTL
I have an Enum called Status defined as such:
13 Answers
13
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In what cases do I use malloc and/or new?
I see in C++ there are multiple ways to allocate and free data and I understand that when you call malloc you should call free and when you use the new operator you should pair with delete and it is a mistake to mix the two (e.g. Calling free() on something that was created with the new ...