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Difference between local and global indexes in DynamoDB
...ned to Secondary Indexes:
In a Local Secondary Index, the range key value DOES NOT need to be unique for a given hash key value, same thing applies to Global Secondary Indexes, the key values (Hash and Range) DO NOT need to be unique.
Source: http://docs.aws.amazon.com/amazondynamodb/latest/develo...
Referring to the null object in Python
...pe()
>>> id(another_none)
10748000
>>> def function_that_does_nothing(): pass
>>> return_value = function_that_does_nothing()
>>> id(return_value)
10748000
None cannot be overwritten
In much older versions of Python (before 2.4) it was possible to reassign None, ...
Why is there no Constant feature in Java?
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What does const mean
First, realize that the semantics of a "const" keyword means different things to different people:
read-only reference - Java final semantics - reference variable itself cannot be reassigned to point to anot...
Difference between except: and except Exception as e: in Python
...l name 'asd' is not defined ("global name 'asd' is not defined",)
But it doesn't catch BaseException or the system-exiting exceptions SystemExit, KeyboardInterrupt and GeneratorExit:
>>> def catch():
... try:
... raise BaseException()
... except Exception as e:
... ...
How do I parse a URL into hostname and path in javascript?
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Experimental technology: IE doens't support this! developer.mozilla.org/en-US/docs/Web/API/URL/…
– cwouter
Mar 18 '15 at 15:08
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How to capture the browser window close event?
...nFormOrLink ? "Do you really want to close?" : null;
})
The live method doesn't work with the submit event, so if you add a new form, you'll need to bind the handler to it as well.
Note that if a different event handler cancels the submit or navigation, you will lose the confirmation prompt if t...
How to check if a URL is valid
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That doesn't seem to work: 'http://:5984/asdf' =~ URI::regexp and 'http::5984/asdf' =~ URI::regexp both return 0. I expected them to return nil because none of them are valid URIs.
– awendt
N...
allowDefinition='MachineToApplication' error when publishing from VS2010 (but only after a previous
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nb the solution that phil has on that blog DOES NOT work for me. the above solution is my only solution.
– benpage
May 18 '11 at 23:14
9
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How can I perform a str_replace in JavaScript, replacing text in JavaScript?
... obviously. It can also accept regular expressions.
Just remember that it does not change the original string. It only returns the new value.
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Efficient way to apply multiple filters to pandas DataFrame or Series
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Your right, boolean is more efficient since it doesn't make a copy of the data. However, my scenario is a bit more tricky than your example. The input I receive is a dictionary defining what filters to apply. My example could do something like df[(ge(df['col1'], 1) &am...