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How do you use the ellipsis slicing syntax in Python?
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Ellipsis, or ... is not a hidden feature, it's just a constant. It's quite different to, say, javascript ES6 where it's a part of the language syntax. No builtin class or Python language constuct makes use of it.
So the syntax for it depends entirely on you, or som...
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
Should I test if something is valid or just try to do it and catch the exception?
8 Answers
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Is it possible to cache POST methods in HTTP?
With very simple caching semantics: if the parameters are the same (and the URL is the same, of course), then it's a hit. Is that possible? Recommended?
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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
I am getting this error when I GetById() on an entity and then set the collection of child entities to my new list which comes from the MVC view.
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Loop through an array in JavaScript
... of beneficial array methods, one of them, the Array.prototype.forEach and it gives us a concise way to iterate over an array:
const array = ["one", "two", "three"]
array.forEach(function (item, index) {
console.log(item, index);
});
Being almost ten years as the time of writing that the...
Is there an interactive way to learn Vim? [closed]
...arn Vim that didn't involve a wall of text, or scrolling through vimtutor without knowing the commands to do so. I wondered if anything else existed for such a purpose.
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What does -> mean in Python function definitions?
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It's a function annotation.
In more detail, Python 2.x has docstrings, which allow you to attach a metadata string to various types of object. This is amazingly handy, so Python 3 extends the feature by allowing you to attac...
Why can I use a function before it's defined in JavaScript?
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The function declaration is magic and causes its identifier to be bound before anything in its code-block* is executed.
This differs from an assignment with a function expression, which is evaluated in normal top-down order.
If you changed the example to say:
var int...
How to get string objects instead of Unicode from JSON?
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A solution with object_hook
import json
def json_load_byteified(file_handle):
return _byteify(
json.load(file_handle, object_hook=_byteify),
ignore_dicts=True
)
def json_loads_byteified(json_text):
return _...
What is Activity.finish() method doing exactly?
... android applications for a while, and followed a lot of posts about activity life cycle, and application's life cycle.
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