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How to know if an object has an attribute in Python
Is there a way in Python to determine if an object has some attribute? For example:
14 Answers
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What is a proper naming convention for MySQL FKs?
...ySQL, there is no need to give a symbolic name to foreign key constraints. If a name is not given, InnoDB creates a unique name automatically.
In any case, this is the convention that I use:
fk_[referencing table name]_[referenced table name]_[referencing field name]
Example:
CREATE TABLE users...
SSL Error: CERT_UNTRUSTED while using npm command
... suggested me to install the above version, it was installed properly, but now npm is not working. I am giving you link to my previous question stackoverflow.com/questions/21850871/…
– Sudip7
Feb 19 '14 at 12:07
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Scala best way of turning a Collection into a Map-by-key?
If I have a collection c of type T and there is a property p on T (of type P , say), what is the best way to do a map-by-extracting-key ?
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What is WEB-INF used for in a Java EE web application?
...ld process.
While you are usually free to design your own build process, nowadays most people will use a standardized approach such as Apache Maven. Among other things Maven defines defaults for which resources in the project structure map to what resources in the resulting artifact (the resulting...
Javascript/DOM: How to remove all events of a DOM object?
...t sure what you mean with remove all events. Remove all handlers for a specific type of event or all event handlers for one type?
Remove all event handlers
If you want to remove all event handlers (of any type), you could clone the element and replace it with its clone:
var clone = element.cloneN...
Python Pandas: Get index of rows which column matches certain value
...()
or equivalently,
df.index[df['BoolCol']].tolist()
You can see the difference quite clearly by playing with a DataFrame with
a non-default index that does not equal to the row's numerical position:
df = pd.DataFrame({'BoolCol': [True, False, False, True, True]},
index=[10,20,30,40,50]...
Pass an array of integers to ASP.NET Web API?
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What if I don't know how much variables I have in the array? What if it's like 1000? The request shouldn't be like that.
– Sahar Ch.
May 30 '14 at 8:22
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CURL alternative in Python
...ON decoding is handy as well. No need to manually load the body with json if the appropriate content-type is set.
– Thomas Farvour
Dec 17 '13 at 21:36
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Getting a map() to return a list in Python 3.x
...t cases, this ends up saving memory, and should make things go faster.
If all you're going to do is iterate over this list eventually, there's no need to even convert it to a list, because you can still iterate over the map object like so:
# Prints "ABCD"
for ch in map(chr,[65,66,67,68]):
p...