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What's invokedynamic and how do I use it?
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Some time ago, C# added a cool feature, dynamic syntax within C#
Object obj = ...; // no static type available
dynamic duck = obj;
duck.quack(); // or any method. no compiler checking.
Think of it as syntax sugar for reflectiv...
Haversine Formula in Python (Bearing and Distance between two GPS points)
...m reading a paper. You have given me a pointer: haversine formula my first time to hear this, thank you.
– arilwan
Sep 3 '19 at 16:04
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Using Case/Switch and GetType to determine the object [duplicate]
...s is a fairly expensive pattern that leads to a relatively large amount of time in GC. But still, very readable...
– JoeGeeky
Nov 2 '10 at 9:50
1
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Big-O for Eight Year Olds? [duplicate]
... to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to perform won't grow because there are m...
How to get a function name as a string?
...ke func_name, it works on built-in functions as well:
>>> import time
>>> time.time.func_name
Traceback (most recent call last):
File "<stdin>", line 1, in ?
AttributeError: 'builtin_function_or_method' object has no attribute 'func_name'
>>> time.time.__name__
'...
What are the dark corners of Vim your mom never told you about? [closed]
...to how it was 15 minutes ago. Can take various arguments for the amount of time you want to roll back, and is dependent on undolevels. Can be reversed with the opposite command :later
share
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improv...
Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The s
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This generally happens when you try login from different time zone or IP Address Computer. Your production server and the mail id you have used both are in different time zone. Choose either of these two solutions:
1) Log in to production server via remote access, and sign in to g...
Can pandas automatically recognize dates?
...n, which is the most flexible way possible.
Suppose you have a column 'datetime' with your string, then:
from datetime import datetime
dateparse = lambda x: datetime.strptime(x, '%Y-%m-%d %H:%M:%S')
df = pd.read_csv(infile, parse_dates=['datetime'], date_parser=dateparse)
This way you can even com...
How to quickly and conveniently create a one element arraylist [duplicate]
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@RavishBhagdev - not always. There are times when you may want to add stuff to the list later. In fact, I used exactly this answer's approach in a path-finding algorithm in graphs.
– Chthonic Project
Mar 17 '16 at 22:48
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Difference between clustered and nonclustered index [duplicate]
...se case where data updates frequently, the SQL needs to update Index every time data is updated? And does it slow down the SQL when performing update? (of course I'm talking about huge data set)
– Krunal
Aug 7 '16 at 10:26
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