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Django self-referential foreign key
...o this might be a dumb question. I want to make a model ("CategoryModel") with a field that points to the primary id of another instance of the model (its parent).
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How do I set the figure title and axes labels font size in Matplotlib?
...
Functions dealing with text like label, title, etc. accept parameters same as matplotlib.text.Text. For the font size you can use size/fontsize:
from matplotlib import pyplot as plt
fig = plt.figure()
plt.plot(data)
fig.suptitle('test tit...
How to determine whether an object has a given property in JavaScript
...ct has property:
If you are testing for properties that are on the object itself (not a part of its prototype chain) you can use .hasOwnProperty():
if (x.hasOwnProperty('y')) {
// ......
}
Object or its prototype has a property:
You can use the in operator to test for properties that are inh...
What is a good Hash Function?
...plications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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Traits in PHP – any real world examples/best practices? [closed]
Traits have been one of the biggest additions for PHP 5.4. I know the syntax and understand the idea behind traits, like horizontal code re-use for common stuff like logging, security, caching etc.
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How to check 'undefined' value in jQuery
...veloped specifically to simplify and to unify certain JavaScript functionality.
However if you need to check a variable against undefined value, there is no need to invent any special method, since JavaScript has a typeof operator, which is simple, fast and cross-platform:
if (typeof value === "un...
Is it Linq or Lambda?
...
This is LINQ (using query syntax):
var _Results = from item in _List
where item.Value == 1
select item;
This is also LINQ (using method syntax):
var _Results = _List.Where(x => x.Value == 1);
It's interesting to note that both of these flav...
Size of Matrix OpenCV
...follow
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edited Dec 7 '18 at 21:42
Vlad
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Python, Unicode, and the Windows console
...ay I can make Python automatically print a ? instead of failing in this situation?
13 Answers
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Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
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Even without the for(;;); how would the attacker get the data?
Attacks are based on altering the behaviour of the built-in types, in particular Object and Array, by altering their constructor function or its prototype. Then when ...