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Convert columns to string in Pandas
...der,
# Setup
df = pd.DataFrame({'A': ['a', 'b', 'c'], 'B': [{}, [1, 2, 3], 123]})
df
A B
0 a {}
1 b [1, 2, 3]
2 c 123
Upto pandas 0.25, there was virtually no way to distinguish that "A" and "B" do not have the same type of data.
# pandas <= 0.25
df.dtypes
A ...
Check if a string has white space
...space1').html(hasWhiteSpace(' '));
$('#whitespace2').html(hasWhiteSpace('123'));
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
" ": <span id="whitespace1"></span><br>
"123": <span id="whitespace2"></span>
...
Printing the correct number of decimal points with cout
...lt;iomanip>
int main(int argc, char** argv)
{
float testme[] = { 0.12345, 1.2345, 12.345, 123.45, 1234.5, 12345 };
std::cout << std::setprecision(2) << std::fixed;
for(int i = 0; i < 6; ++i)
{
std::cout << testme[i] << std::endl;
}
re...
How can I calculate the number of lines changed between two commits in git?
...
Assuming that you want to compare all of your commits between abcd123 (the first commit) and wxyz789 (the last commit), inclusive:
git log wxyz789^..abcd123 --oneline --shortstat --author="Mike Surname"
This gives succinct output like:
abcd123 Made things better
3 files changed, 14 ins...
LISTAGG in Oracle to return distinct values
...t useful:
with test_data as
(
select 'A' as col1, 'T_a1' as col2, '123' as col3 from dual
union select 'A', 'T_a1', '456' from dual
union select 'A', 'T_a1', '789' from dual
union select 'A', 'T_a2', '123' from dual
union select 'A', 'T_a2', '456' from dual
union select 'A', 'T_a2', '111' fr...
How to hide the “back” button in UINavigationController?
...nswered Dec 11 '13 at 8:02
mattv123mattv123
89988 silver badges1313 bronze badges
...
Find rows that have the same value on a column in MySQL
...* FROM member WHERE email = (Select email From member Where login_id = john123@hotmail.com)
This will return all records that have john123@hotmail.com as a login_id value.
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improve this an...
How to remove all characters after a specific character in python?
..., if you want remove every thing from the character, do this:
mystring = "123⋯567"
mystring[ 0 : mystring.index("⋯")]
>> '123'
If you want to keep the character, add 1 to the character position.
share
...
Simple insecure two-way data “obfuscation”?
...leAES
{
// Change these keys
private byte[] Key = __Replace_Me__({ 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 });
// a hardcoded IV should not be used for production AES-CBC code
// ...
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