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Using LINQ to remove elements from a List
... for( int i = 0; i < size; i++ )
{
ch = Convert.ToChar( Convert.ToInt32( Math.Floor( 26 * random.NextDouble() + 65 ) ) );
builder.Append( ch );
}
return builder.ToString();
}
}
}
Results below:
Be patient, gen...
Redefining NULL
... for literal zeros in assignments to pointers (or casts to pointers) to be converted into some other magic value such as -1.
Arrange for equality tests between pointers and a constant integer 0 to check for the magic value instead (§6.5.9/6)
Arrange for all contexts in which a pointer type is evalu...
R command for setting working directory to source file location in Rstudio
...
This answer can help:
script.dir <- dirname(sys.frame(1)$ofile)
Note: script must be sourced in order to return correct path
I found it in: https://support.rstudio.com/hc/communities/public/questions/200895567-can-user-obtain-the-path-of-current-Project-s-direct...
How to properly compare two Integers in Java?
...r are both of numeric type, or
one is of numeric type and the other
is convertible (§5.1.8) to numeric
type, binary numeric promotion is
performed on the operands (§5.6.2).
and for <, <=, > and >= (JLS 15.20.1)
The type of each of the operands of a
numerical comparison ...
Can a C# lambda expression have more than one statement?
...pression using braces, but only the syntax which doesn't use braces can be converted into an expression tree:
// Valid
Func<int, int> a = x => x + 1;
Func<int, int> b = x => { return x + 1; };
Expression<Func<int, int>> c = x => x + 1;
// Invalid
Expression...
Convert python datetime to epoch with strftime
...
If you want to convert a python datetime to seconds since epoch you could do it explicitly:
>>> (datetime.datetime(2012,04,01,0,0) - datetime.datetime(1970,1,1)).total_seconds()
1333238400.0
In Python 3.3+ you can use timestamp(...
Difference between float and decimal data type
...nversion functions would often create tons of minute differences in values converted from ASCII to float when compared against those in, say, SQLServer. This is rarely true anymore. Testing is the best policy, as it's best to know for certain what the trade-offs are.
– user1899...
Sending mail from Python using SMTP
...plain'
content="""\
Test message
"""
subject="Sent from Python"
import sys
import os
import re
from smtplib import SMTP_SSL as SMTP # this invokes the secure SMTP protocol (port 465, uses SSL)
# from smtplib import SMTP # use this for standard SMTP protocol (port 25, no...
machine learning libraries in C# [closed]
...; example.Count; i++)
{
instance.setValue(attributes[i], Convert.ToDouble(example[i]));
}
instances.add(instance);
}
return instances;
}
}
public static class Classifier
{
public static TClassifier Build<TClassifier>(TrainingSet training...
How to save an image locally using Python whose URL address I already know?
... urllib2
import shutil
import requests
from urlparse import urljoin
import sys
import time
def make_soup(url):
req = urllib2.Request(url, headers={'User-Agent' : "Magic Browser"})
html = urllib2.urlopen(req)
return BeautifulSoup(html, 'html.parser')
def get_images(url):
soup = mak...