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What does enumerate() mean?
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The enumerate() function adds a counter to an iterable.
So for each element in cursor, a tuple is produced with (counter, element); the for loop binds that to row_number and row, respectively.
Demo:
>>> elements = ('foo', 'bar', 'baz')
>>> for elem i...
What is the difference between quiet NaN and signaling NaN?
...program checks the result and sees a NaN. That is, computation continues without any signal from the floating point unit (FPU) or library if floating-point is implemented in software. A signalling NaN will produce a signal, usually in the form of exception from the FPU. Whether the exception is t...
Flask-SQLAlchemy import/context issue
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The flask_sqlalchemy module does not have to be initialized with the app right away - you can do this instead:
# apps.members.models
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class Member(db.Model):
# fields here
pass
And then in your application...
node.js require all files in a folder?
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When require is given the path of a folder, it'll look for an index.js file in that folder; if there is one, it uses that, and if there isn't, it fails.
It would probably make most sense (if you have control over the folder) to create an index.js file and then assign ...
Does using “new” on a struct allocate it on the heap or stack?
When you create an instance of a class with the new operator, memory gets allocated on the heap. When you create an instance of a struct with the new operator where does the memory get allocated, on the heap or on the stack ?
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sqlalchemy unique across multiple columns
...or if index is True as well, indicates that the Index
should be created with the unique flag. To specify multiple columns in
the constraint/index or to specify an explicit name, use the
UniqueConstraint or Index constructs explicitly.
As these belong to a Table and not to a mapped Class, one...
LINQ Select Distinct with Anonymous Types
So I have a collection of objects. The exact type isn't important. From it I want to extract all the unique pairs of a pair of particular properties, thusly:
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How to open a new window on form submit
I have a submit form and want it to open a new window when users submits the form so i can track it on analytics.
9 Answers...
How to write inline if statement for print?
...a boolean variable is set to True . So, after looking at this , I tried with a simple example:
13 Answers
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Set breakpoint in C or C++ code programmatically for gdb on Linux
...ATE: MSDN states that Windows doesn't really support SIGINT, so if portability is a concern, you're probably better off using SIGABRT.
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