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How do I raise the same Exception with a custom message in Python?
...essage " +e.message)
This will also do the right thing if err is derived from ValueError. For example UnicodeDecodeError.
Note that you can add whatever you like to err. For example err.problematic_array=[1,2,3].
Edit: @Ducan points in a comment the above does not work with python 3 since .me...
Can you break from a Groovy “each” closure?
Is it possible to break from a Groovy .each{Closure} , or should I be using a classic loop instead?
6 Answers
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How exactly does the callstack work?
...pile time and are therefore hardcoded into the machine code.
This graphic from Wikipedia shows what the typical call stack is structured like1:
Add the offset of a variable we want to access to the address contained in the frame pointer and we get the address of our variable. So shortly said, th...
Show a popup/message box from a Windows batch file
Is there a way to display a message box from a batch file (similar to how xmessage can be used from bash-scripts in Linux)?
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How do I profile memory usage in Python?
... here: Python memory profiler
Basically you do something like that (cited from Guppy-PE):
>>> from guppy import hpy; h=hpy()
>>> h.heap()
Partition of a set of 48477 objects. Total size = 3265516 bytes.
Index Count % Size % Cumulative % Kind (class / dict of class)
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How can I remove a specific item from an array?
...ction removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:
function removeItemOnce(arr, value) {
var index = arr.indexOf(value);
if (index > -1) {
arr.splice(index, 1);
}
return arr;
}...
Counting inversions in an array
...he only moment when inversions are removed is when algorithm takes element from the right side of an array and merge it to the main array.
The number of inversions removed by this operation is the number of elements left from the the left array to be merged. :)
Hope it's explanatory enough.
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Git: How to update/checkout a single file from remote origin master?
...area).
The checkout will update the working tree with the particular file from the downloaded changes (origin/master).
At least this works for me for those little small typo fixes, where it feels weird to create a branch etc just to change one word in a file.
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MySQL Delete all rows from table and reset ID to zero
I need to delete all rows from a table but when I add a new row, I want the primary key ID, which has an auto increment, to start again from 0 respectively from 1.
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Use RSA private key to generate public key?
...if you have the private key then you can calculate (derive) the public key from it - which is what the 2nd command above does. It calculates, not extracts, the public key.
– steveayre
Feb 27 '13 at 14:59
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