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Understanding repr( ) function in Python

... Can you also let us know some use cases when one should use repr function. I am unable to comprehend that – gaurav parashar May 17 '19 at 12:22 ...
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'is' versus try cast with null check

... casts seem to be performed as fast as they used to be but as and linq are now approximately 3 times faster. share | improve this answer | follow | ...
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How to set a value of a variable inside a template code?

...rary() @register.assignment_tag def get_addressee(): return "World" Now you may use the get_addressee template tag in your templates: {% load hello_world %} {% get_addressee as addressee %} <html> <body> <h1>hello {{addressee}}</h1> </body> &lt...
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unique object identifier in javascript

I need to do some experiment and I need to know some kind of unique identifier for objects in javascript, so I can see if they are the same. I don't want to use equality operators, I need something like the id() function in python. ...
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What is memoization and how can I use it in Python?

... return k * factorial(k - 1) factorial = Memoize(factorial) A feature known as "decorators" was added in Python 2.4 which allow you to now simply write the following to accomplish the same thing: @Memoize def factorial(k): if k < 2: return 1 return k * factorial(k - 1) The Python D...
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List all indexes on ElasticSearch server?

... @paweloque answer now looks like it's the correct solution; seems cleaner. curl http://localhost:9200/_stats/indexes\?pretty\=1 – notapatch Mar 28 '14 at 12:09 ...
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Python division

...2.7 and Python 3.3. In Python 2.7 and Python 3.3: >>>20//15 1 Now, see the comparison >>>a = 7.0/4.0 >>>b = 7/4 >>>print a == b For the above program, the output will be False in Python 2.7 and True in Python 3.3. In Python 2.7 a = 1.75 and b = 1. In Pyth...
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What is a “callable”?

Now that it's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means. ...
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Simplest two-way encryption using PHP

... guys, just FYI => MCRYPT IS DEPRECATED. capsing so everyone should know not to use it as it gave us a myriad of issues. It deprecated since PHP 7.1 if i'm not mistaken. – clusterBuddy Jun 3 '19 at 10:29 ...
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How do you detect where two line segments intersect? [closed]

...bering that s × r = − r × s): u = (q − p) × r / (r × s) Now there are four cases: If r × s = 0 and (q − p) × r = 0, then the two lines are collinear. In this case, express the endpoints of the second segment (q and q + s) in terms of the equation of the first li...