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What's the difference between eval, exec, and compile?
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The short answer, or TL;DR
Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects.
eval and exec have these two differences:
eval acce...
What does “xmlns” in XML mean?
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It means XML namespace.
Basically, every element (or attribute) in XML belongs to a namespace, a way of "qualifying" the name of the element.
Imagine you and I both invent our own XML. You invent XML to describe people, I invent mine to describe cities...
Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
...istener", so that we only need one list in the Radio class, and always can call the same function on whatever object we have that wants to listen to the signal. But that still creates a coupling between whatever interface/base class/etc we decide on and the Radio class. Basically whenever you change...
How is the java memory pool divided?
...od data, and the code for methods and constructors. The method area is logically part of the heap but, depending on the implementation, a Java VM may not garbage collect or compact it. Like the heap memory, the method area may be of a fixed or variable size. The memory for the method area does not n...
How do I select text nodes with jQuery?
...itespace text nodes are included in the output (in jQuery they are automatically filtered out).
Update: Fixed bug when includeWhitespaceNodes is falsy.
function getTextNodesIn(node, includeWhitespaceNodes) {
var textNodes = [], nonWhitespaceMatcher = /\S/;
function getTextNodes(node) {
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new DateTime() vs default(DateTime)
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default(), for any value type (DateTime is a value type) will always call the parameterless constructor.
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Why am I seeing “TypeError: string indices must be integers”?
...tly passed a tuple of two integers (0 and 5) to the slice notation when we called my_string[0,5] because 0,5 (even without the parentheses) evaluates to the same tuple as (0,5) would do.
A comma , is actually enough for Python to evaluate something as a tuple:
>>> my_variable = 0,
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How do you create a transparent demo screen for an Android app?
... exactly what i looking for simple and straight forward ,and easily method call without controlling or stacking activities . thanks
– Abhishek Garg
Dec 4 '18 at 12:24
add a co...
Max retries exceeded with URL in requests
...has to be exactly right, a rate limit placed by the server. I can make 80 calls and then this message will appear for me. Then after a short time, the server is available for another 80 calls and the cycle repeats. it is too regular to be anything else.
– demongolem
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Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
...e code, but if I want to copy a specific section and play around with it locally, it would be a pain to copy all the individual elements and their associated CSS. And probably just as much work to save the entire source and cut out the unrelated code.
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