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How to avoid circular imports in Python? [duplicate]
...rcular import dependencies typically fall into two categories depending
on what you're trying to import and where you're using it inside each
module. (And whether you're using python 2 or 3).
1. Errors importing modules with circular imports
In some cases, just importing a module with a circular i...
Base64 length calculation?
...t input divided by 6 results in 4 Base64 characters.
You ask in a comment what the size of encoding 123456 would be. Keeping in mind that every every character of that string is 1 byte, or 8 bits, in size (assuming ASCII/UTF8 encoding), we are encoding 6 bytes, or 48 bits, of data. According to the...
Laravel Schema onDelete set null
...aravel.com/docs/6.x/migrations#foreign-key-constraints it doesn't document what options there are, but I think you can assume it's the default mysql values (see ../ vendor / laravel / framework / src / Illuminate / Database / Schema / Grammars / Grammar.php)
– Dirk Jan
...
Why does pycharm propose to change method to static
...re could be top-level, however, this does not feel logical when looking at what this method does - as top-level it would look more of a global method, while it is in fact a small helper method for instances created from that class. So to keep my code logically organised, the decorator is the perfect...
Correct way to write loops for promise.
... });
}, Promise.resolve());
}
Call as follows :
//Compose here, by whatever means, an array of email addresses.
var arrayOfEmailAddys = [...];
fetchUserDetails(arrayOfEmailAddys).then(function() {
console.log('all done');
});
As you can see, there's no need for the ugly outer var coun...
Remove columns from DataTable in C#
... wants to remove multiple columns from a DataTable.
So for that, here is what I did, when I came across the same problem.
string[] ColumnsToBeDeleted = { "col1", "col2", "col3", "col4" };
foreach (string ColName in ColumnsToBeDeleted)
{
if (dt.Columns.Contains(ColName))
dt.Columns.Re...
while (1) Vs. for (;;) Is there a speed difference?
...etely' incorrect, it's just focusing on the runtime costs. I can't imagine what kind of situation would result in the parsing time of infinite loops being the key deciding factor in how fast your program runs
– bdonlan
Sep 4 '11 at 22:23
...
Storing a Map using JPA
...ample_attributes should have a composite key (example_id, name) - which is what hbm2ddl will generate from the above.
– James Bassett
Nov 20 '14 at 22:47
...
How to store a dataframe using Pandas
...e other with numbers. Their disclaimer says:
You should not trust that what follows generalizes to your data. You should look at your own data and run benchmarks yourself
The source code for the test which they refer to is available online. Since this code did not work directly I made some min...
Where can I get a “useful” C++ binary search algorithm?
...nswer, check Matt Austern's classic article Why You Shouldn't Use set, and What You Should Use Instead (C++ Report 12:4, April 2000) to understand why binary search with sorted vectors is usually preferable to std::set, which is a tree-based associative container.
– ZunTzu
...