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Python 3: UnboundLocalError: local variable referenced before assignment [duplicate]
...or += will only update (reassign) an existing variable, but for reasons unknown (likely consistency in this context), Python treats it as an assignment). The Python interpreter sees this at module load time and decides (correctly so) that the global scope's Var1 should not be used inside the local s...
Setting default values for columns in JPA
... this be if (createdt != null) createdt = new Date(); or something? Right now, this will override an explicitly specified value, which seems to make it not really be a default.
– Max Nanasy
Nov 25 '14 at 21:48
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What is the maximum length of a table name in Oracle?
... stated above, in Oracle 12.2 and later, the maximum object name length is now 128 bytes.
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Loop through an array in JavaScript
...e this:
var x = [1,2,3,4].map( function(item) {return item * 10;});
And now x is [10,20,30,40].
You don't have to write the function inline. It could be a separate function.
var item_processor = function(item) {
// Do something complicated to an item
}
new_list = my_list.map(item_process...
Who wrote this programing saying? “Always code as if the guy who ends up maintaining your code will
...y who ends up maintaining your code will be a
violent psychopath who knows where you live. Code for readability.
Damn right!
So maybe John Woods?
Aug 22, 2014: Link is updated.
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How to mark a method as obsolete or deprecated?
...essage argument is optional but a good idea to communicate why the item is now obsolete and/or what to use instead.
Example:
[System.Obsolete("use myMethodB instead")]
void myMethodA()
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Getting the current page
...he last of which - page five - will show that remaining 0.313 of content.
Now, numberOfPages being five means that the page indices will be 0, 1, 2, 3, and 4.
When I swipe rightwards, paging towards the final offset, the scrollViewDidEndDecelerating method gives a final X offset of 2412.
Applyin...
Get selected value in dropdown list using JavaScript
... should be e.target.options[e.target.selectedIndex].text don't know why it's wrong in all answers here..
– OZZIE
Jan 2 '19 at 11:10
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Mapping enum to string in hibernate
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You can even go further and, now as JPA 2.1 is released, use @Converter(autoApply = true) public class CategoryTypeConverter implements javax.persistence.AttributeConverter <CategoryType, String>
– membersound
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Access an arbitrary element in a dictionary in Python
...; (key, value) tuple of "first" element
Please note that (at best of my knowledge) Python does not guarantee that 2 successive calls to any of these methods will return list with the same ordering. This is not supported with Python3.
in Python 3:
list(my_dict.keys())[0] -> key of "first" ...