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How does Access-Control-Allow-Origin header work?
...Cross-Origin Resource Sharing) header.
When Site A tries to fetch content from Site B, Site B can send an Access-Control-Allow-Origin response header to tell the browser that the content of this page is accessible to certain origins. (An origin is a domain, plus a scheme and port number.) By defa...
Run function from the command line
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Alternatively, if you don't care about namespace pollution:
$ python -c 'from foo import *; print hello()'
And the middle ground:
$ python -c 'from foo import hello; print hello()'
share
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imp...
Resolve conflicts using remote changes when pulling from Git remote
I'm trying to pull code from my GitHub repo onto my server, but the pull keeps failing because of merge conflicts. I don't want to keep any of the changes that may have occurred on my local server since the last pull.
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jQuery: Return data after ajax call success [duplicate]
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The only way to return the data from the function would be to make a synchronous call instead of an asynchronous call, but that would freeze up the browser while it's waiting for the response.
You can pass in a callback function that handles the result:
f...
How to read file from relative path in Java project? java.io.File cannot find the path specified
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If it's already in the classpath, then just obtain it from the classpath instead of from the disk file system. Don't fiddle with relative paths in java.io.File. They are dependent on the current working directory over which you have totally no control from inside the Java code.
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TypeError: 'module' object is not callable
...module, containing the class socket.
You need to do socket.socket(...) or from socket import socket:
>>> import socket
>>> socket
<module 'socket' from 'C:\Python27\lib\socket.pyc'>
>>> socket.socket
<class 'socket._socketobject'>
>>>
>>> fr...
How do you split a list into evenly sized chunks?
...unks you want:
def chunks(lst, n):
"""Yield successive n-sized chunks from lst."""
for i in range(0, len(lst), n):
yield lst[i:i + n]
import pprint
pprint.pprint(list(chunks(range(10, 75), 10)))
[[10, 11, 12, 13, 14, 15, 16, 17, 18, 19],
[20, 21, 22, 23, 24, 25, 26, 27, 28, 29]...
Saving and loading objects and using pickle
... further data to read. You have to rewind the file so that it will be read from the beginning again:
file.seek(0)
What you usually want to do though, is to use a context manager to open the file and read data from it. This way, the file will be automatically closed after the block finishes execut...
Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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How to use R's ellipsis feature when writing your own function?
...10 and so on. That explain why [-1L] is needed: it removes expected symbol from provided arguments in ... (cause it is always a list).
As Dirk states substitute returns "parse tree the unevaluated expression".
When you call my_ellipsis_function(a=1:10,b=11:20,c=21:30) then ... "creates" a list of ar...