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How to jump to a particular line in a huge text file?
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linecache:
The linecache module allows one to get any line from a Python source file, while attempting to optimize internally, using a cache, the common case where many lines are read from a single file. This is used by the traceback module to retrieve source lines for inclusion in the form...
Calculate distance between two latitude-longitude points? (Haversine formula)
...h my jsPerf and see the results here.
Recently I needed to do the same in python, so here is a python implementation:
from math import cos, asin, sqrt, pi
def distance(lat1, lon1, lat2, lon2):
p = pi/180
a = 0.5 - cos((lat2-lat1)*p)/2 + cos(lat1*p) * cos(lat2*p) * (1-cos((lon2-lon1)*p))/2...
SQL Server: SELECT only the rows with MAX(DATE)
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If you post code, XML or data samples, please highlight those lines in the text editor and click on the "code samples" button ( { } ) on the editor toolbar to nicely format and syntax highlight it!
– marc_s
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SQLAlchemy: Creating vs. Reusing a Session
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Hi, @zzzeek. Thanks for excellent answer. I'm very new in python and several things I wanna clarify: 1) Do I understand correct when I create new "session" by calling Session() method it will create SQL Transaction, then transaction will be opened until I commit/rollback session? 2...
When & why to use delegates? [duplicate]
...projects referencing each other.
Let's assume an application downloads an XML, and then saves the XML to a database.
I have 2 projects here which build my solution: FTP and a SaveDatabase.
So, our application starts by looking for any downloads and downloading the file(s) then it calls the Save...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...void using apply
Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above
%%timeit
A1, A2 = [], []
for val in df['a']:
A1.append(val**2)
A2.append(val**3)
df['A1'] = A1
df['A2'] = A2
298 ms ± 7.14 ms per...
Creating a div element in jQuery [duplicate]
...) and single quotes around attributes are in fact perfectly valid in HTML, XML, and XHTML. See stackoverflow.com/questions/2210430/…
– Mark Amery
Dec 5 '13 at 12:29
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Generating PDF files with JavaScript
I’m trying to convert XML data into PDF files from a web page and I was hoping I could do this entirely within JavaScript. I need to be able to draw text, images and simple shapes. I would love to be able to do this entirely in the browser.
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Android getting value from selected radiobutton
...Button.getText(), Toast.LENGTH_SHORT).show();
}
});
}
}
xml
<RadioGroup
android:id="@+id/radio"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RadioButton
android:id="@+id/radioMale"
an...
Error: “The node to be inserted is from a different document context”
When I am calling XmlNode.AppendChild() , I get this error:
1 Answer
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