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How do I validate a date string format in python?
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233
>>> import datetime
>>> def validate(date_text):
try:
datetime.d...
How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
...ragg or creating a function.
create table countries ( country_name varchar2 (100));
insert into countries values ('Albania');
insert into countries values ('Andorra');
insert into countries values ('Antigua');
SELECT SUBSTR (SYS_CONNECT_BY_PATH (country_name , ','), 2) csv
FROM (SELECT c...
json_encode sparse PHP array as JSON array, not JSON object
...ng this behaviour because your array is not sequential - it has keys 0 and 2, but doesn't have 1 as a key.
Just having numeric indexes isn't enough. json_encode will only encode your PHP array as a JSON array if your PHP array is sequential - that is, if its keys are 0, 1, 2, 3, ...
You can reinde...
T-SQL split string
I have a SQL Server 2008 R2 column containing a string which I need to split by a comma. I have seen many answers on StackOverflow but none of them works in R2. I have made sure I have select permissions on any split function examples. Any help greatly appreciated.
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How to install packages offline?
...$ mkdir /pypi && cd /pypi
$ ls -la
-rw-r--r-- 1 pavel staff 237954 Apr 19 11:31 Flask-WTF-0.6.tar.gz
-rw-r--r-- 1 pavel staff 389741 Feb 22 17:10 Jinja2-2.6.tar.gz
-rw-r--r-- 1 pavel staff 70305 Apr 11 00:28 MySQL-python-1.2.3.tar.gz
-rw-r--r-- 1 pavel staff 25972...
How can I map True/False to 1/0 in a Pandas DataFrame?
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284
A succinct way to convert a single column of boolean values to a column of integers 1 or 0:
d...
How can mixed data types (int, float, char, etc) be stored in an array?
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244
You can make the array elements a discriminated union, aka tagged union.
struct {
enum { ...
Check if a value is in an array (C#)
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234
Add necessary namespace
using System.Linq;
Then you can use linq Contains() method
string[...
How do you compare two version Strings in Java?
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