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How to check whether a string is Base64 encoded or not
I want to decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
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Python: Check if one dictionary is a subset of another larger dictionary
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If the dict values are hashable, using viewitems() is the most optimizied way I can think of: d1.viewitems() <= d2.viewitems(). Timeit runs showed over a 3x performance improvement. If not hashable, even using iteritems(...
Get IP address of visitors using Flask for Python
...emote_addr.
Code example
from flask import request
from flask import jsonify
@app.route("/get_my_ip", methods=["GET"])
def get_my_ip():
return jsonify({'ip': request.remote_addr}), 200
For more information see the Werkzeug documentation.
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Get Enum from Description attribute [duplicate]
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foreach(var field in typeof(T).GetFields())
{
if (Attribute.GetCustomAttribute(field,
typeof(DescriptionAttribute)) is DescriptionAttribute attribute)
{
if (attribute.Description == description)
return (T)field....
What is this operator in MySQL?
...erefore supported on other databases, unlike <=>, which is MySQL-specific.
You can think of them as specialisations of MySQL's <=>:
'a' IS NULL ==> 'a' <=> NULL
'a' IS NOT NULL ==> NOT('a' <=> NULL)
Based on this, your particular query (fragment) can be converted t...
Difference between String#equals and String#contentEquals methods
What is the difference between the String#equals method and the String#contentEquals method?
9 Answers
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How do you sort an array on multiple columns?
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If owner names differ, sort by them. Otherwise, use publication name for tiebreaker.
function mysortfunction(a, b) {
var o1 = a[3].toLowerCase();
var o2 = b[3].toLowerCase();
var p1 = a[1].toLowerCase();
var p2 = b...
How to test if a double is an integer
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if ((variable == Math.floor(variable)) && !Double.isInfinite(variable)) {
// integer type
}
This checks if the rounded-down value of the double is the same as the double.
Your variable could have an int or doub...
How to remove certain characters from a string in C++?
..., ")", and "-"
characters from the string.
You can use the std::remove_if() algorithm to remove only the characters you specify:
#include <iostream>
#include <algorithm>
#include <string>
bool IsParenthesesOrDash(char c)
{
switch(c)
{
case '(':
case ')':
c...
Numpy first occurrence of value greater than existing value
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Just a word of caution: if there's no True value in its input array, np.argmax will happily return 0 (which is not what you want in this case).
– ambrus
Feb 7 '14 at 13:15
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