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How to pad zeroes to a string?
...
Strings:
>>> n = '4'
>>> print(n.zfill(3))
004
And for numbers:
>>> n = 4
>>> print(f'{n:03}') # Preferred method, python >= 3.6
004
>>> print('%03d' % n)
004
>>> print(format(n, '03')) # python >= 2.6
004
&...
Get value of a string after last slash in JavaScript
...it grabs the matched characters from the returned match object by indexing into it ([0]); in a match object, the first entry is the whole matched string. No need for capture groups.
Live example
Using lastIndexOf and substring:
var str = "foo/bar/test.html";
var n = str.lastIndexOf('/');
var resu...
What is “entropy and information gain”?
...-1)/2) = prob_array(diff+(array_size-1)/2) + 1
endif
endfor
//Convert values in prob_array to probabilities and compute entropy
n = total(prob_array)
entrop = 0
for i = 0, array_size-1 do begin
prob_array(i) = prob_array(i)/n
//Base 2 log of x is Ln(x)/Ln(2). Take Ln of array ...
How to use java.String.format in Scala?
...etc. in the string, java.util.UnknownFormatConversionException is thrown pointing to a confusing Java source code piece:
11...
Get the current fragment object
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Now at some point of time I need to identify which object is currently there
Call findFragmentById() on FragmentManager and determine which fragment is in your R.id.frameTitle container.
...
Finding last occurrence of substring in string, replacing that
...ntainer). The plus operator just concatenates. The rfind function as you pointed out returns the index around which the replacement operation should take place.
– Aditya Sihag
Jan 24 '13 at 7:44
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How to generate JAXB classes from XSD?
...ss the Atom feed for this blog.
Demo
In this example we will use JAXB to convert the Atom XML feed corresponding to this blog to objects and then back to XML.
import java.io.InputStream;
import java.net.URL;
import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;
import org.w3._2...
Save bitmap to location
... the compression factor (100) is ignored
} catch (IOException e) {
e.printStackTrace();
}
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What is the use of GO in SQL Server Management Studio & Transact SQL?
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Thanks! However then what is the point of the GO statement? This may sound stupid but what does 'batch of code' mean? msdn says after GO the variables' lifespan expire. Sounds nothing to do with transaction commitment right? Is there any circumstances where I ...
ActiveRecord: List columns in table from console
...g rails three you can just type the model name:
> User
gives:
User(id: integer, name: string, email: string, etc...)
In rails four, you need to establish a connection first:
irb(main):001:0> User
=> User (call 'User.connection' to establish a connection)
irb(main):002:0> User.connect...