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How to create a MySQL hierarchical recursive query
...e variables, path IDs, or self-joins.
MySQL 8+
with recursive cte (id, name, parent_id) as (
select id,
name,
parent_id
from products
where parent_id = 19
union all
select p.id,
p.name,
p.parent_id
from produc...
Convert a Unicode string to a string in Python (containing extra symbols)
... His question as written is how to convert a "Unicode string" (whatever he means by that) containing some currency symbols to a "Python string" (whatever ...) and you think that a remove-some-diacritics delete-other-non-ascii characters kludge answers his question???
– John Ma...
Better way to check if a Path is a File or a Directory?
...es and files. A user can select either a file or a directory and then do something with it. This requires me to have a method which performs different actions based on the user's selection.
...
Do we need semicolon at the end? [duplicate]
I missed semicolons in some of the places in my JavaScript, but its not throwing error in any of the browsers. Is the ; at the end needed?
...
Is there a CSS selector for elements containing certain text?
...
If I read the specification correctly, no.
You can match on an element, the name of an attribute in the element, and the value of a named attribute in an element. I don't see anything for matching content within an element, though.
...
if else in a list comprehension [duplicate]
...x >= 45 else x+5 for x in l]
[27, 18, 46, 51, 99, 70, 48, 49, 6]
Do-something if <condition>, else do-something else.
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Groovy Shell warning “Could not open/create prefs root node …”
...lution in a bit more detailed way (for Windows User):
Go into your Start Menu and type regedit into the search field.
Navigate to path HKEY_LOCAL_MACHINE\Software\JavaSoft (Windows 10 seems to now have this here: HKEY_LOCAL_MACHINE\Software\WOW6432Node\JavaSoft)
Right click on the JavaSoft folder ...
SyntaxError: Use of const in strict mode
...e, are turned on by default on Node.js and do NOT require any kind of runtime flag.”. Node.js docs has an overview of what ES2015 features are enabled by default, and which who require a runtime flag. So by upgrading to Node.js 4.x or newer the error should disappear.
To enable some of the ECMASc...
Is there a Python function to determine which quarter of the year a date is in?
...
Given an instance x of datetime.date, (x.month-1)//3 will give you the quarter (0 for first quarter, 1 for second quarter, etc -- add 1 if you need to count from 1 instead;-).
Originally two answers, multiply upvoted and even originally accepted (both...
Parsing a comma-delimited std::string [duplicate]
...
Input one number at a time, and check whether the following character is ,. If so, discard it.
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
int main()
{
std::string str = "1,2,3,4,5,6";
...