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How can I default a parameter to Guid.Empty in C#?
...od is called in PHP; but only creates one object for the entire program in Python. Really, I consider this to be one of the very few design flaws of Python. I'm somewhat glad C# (and VB.Net) avoided this issue by simply disallowing new objects in default parameters... though there are times where ...
Hash String via SHA-256 in Java
...JEE6+ environment one could also use JAXB DataTypeConverter:
import javax.xml.bind.DatatypeConverter;
String hash = DatatypeConverter.printHexBinary(
MessageDigest.getInstance("MD5").digest("SOMESTRING".getBytes("UTF-8")));
...
What's the best manner of implementing a social activity stream? [closed]
...for you. Have a look at getstream.io There are clients available for Node, Python, Rails and PHP.
In addition have a look at this high scalability post were we explain some of the design decisions involved:
http://highscalability.com/blog/2013/10/28/design-decisions-for-scaling-your-high-traffic-fe...
Draw multi-line text to Canvas
...
I have written complete example
colors.xml
<color name="transparentBlack">#64000000</color>
java class
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super....
What is the best django model field to use to represent a US dollar amount?
...emodel.some_currency }}
Output:
$123.00
It has a powerful backend via python-money and it's essentially a drop-in replacement for standard decimal fields.
share
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angular ng-bind-html and directive within it
...on I have
app.directive('element',function($compile){
.
.
var addXml = function(){
var el = $compile('<xml-definitions definitions="definitions" />')($scope);
$scope.renderingElement = el.html();
}
.
.
and in directive template:
<span compile="renderingElemen...
Can we write our own iterator in Java?
...rray of Strings
String[] languages = new String[]{"C", "C++", "Java", "Python", "Scala"};
// create your list and hold the values using the same list implementation.
SOList<String> languagesList = new SOList<String>(languages);
System.out.println("");
// Since our c...
get list from pandas dataframe column
...u pull them out, which you can then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x).
import pandas as pd
data_dict = {'one': pd.Series([1, 2, 3], index=['a', 'b', 'c']),
'two': pd.Series([1, 2, 3, 4], index=['a', 'b', 'c', 'd'])}
df = pd.Data...
add a string prefix to each value in a string column using Pandas
...lso yields the desired output:
col
0 stra
1 str0
If you are using Python 3.6+, you can also use f-strings:
df['col'] = df['col'].apply(lambda x: f"str{x}")
yielding the same output.
The f-string version is almost as fast as @RomanPekar's solution (python 3.6.4):
df = pd.DataFrame({'col...
What is an Endpoint?
...n using a GET, we recommend setting the Accept header to "application/xrds+xml". Google returns an XRDS document containing an OpenID provider endpoint URL.The endpoint address is annotated as:
<Service priority="0">
<Type>http://specs.openid.net/auth/2.0/server</Type>
<URI&g...