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What is a segmentation fault?
...between segfaults in C and C++.
There are many ways to get a segfault, at least in the lower-level languages such as C(++). A common way to get a segfault is to dereference a null pointer:
int *p = NULL;
*p = 1;
Another segfault happens when you try to write to a portion of memory that was mark...
When is each sorting algorithm used? [closed]
... provides a stable sort. In the most cases i know you need a stable, or at least a deterministic, sort.
– 12431234123412341234123
Jul 12 '17 at 7:40
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...
Get the first item from an iterable that matches a condition
...-in, which is why I thought it necessary to provide an answer myself -- at least the "correct version" issue gets on record this way;-).
In 2.5, the .next() method of iterators immediately raises StopIteration if the iterator immediately finishes -- i.e., for your use case, if no item in the iterab...
What is a bus error?
...align the
data for the programmers, the
alignment troubles of yore (at least)
mitigated, and hence one does not see
SIGBUS too often these days (AFAIK).
From: Here
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What's the difference between tilde(~) and caret(^) in package.json?
...ns: 0.0.1, 0.0.2 and 0.0.3. There is a bug in 0.0.1 so you want to have at least 0.0.2 in your package B. If you write 0.0.x you'll get 0.0.3, which is OK. But if some other package C requires both B and A and additionally has constrain "A": "<0.0.2" you'll get 0.0.1 without showing any conflict ...
What's the difference between Ruby's dup and clone methods?
...y the clone. duping your frozen value and passing that in allows you to at least guarantee that no one accidentally modifies your constant, without breaking Rack here.
– XP84
Jul 14 '16 at 23:07
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A CSS selector to get last visible div
... alternative in sight... or provide an alternative. But this answer has at least done its due diligence in actually stating that CSS cannot do what is being asked (albeit it doesn't elaborate why). On the other hand, an answer that just goes off on a JavaScript solution without acknowledging the CSS...
What are the rules for JavaScript's automatic semicolon insertion (ASI)?
...erted before it if:
The token is separated from the previous token by at least one LineTerminator.
The token is }
e.g.:
{ 1
2 } 3
is transformed to
{ 1
;2 ;} 3;
The NumericLiteral 1 meets the first condition, the following token is a line terminator.
The 2 meets the second condi...
Increment a database field by 1
...
If you can safely make (firstName, lastName) the PRIMARY KEY or at least put a UNIQUE key on them, then you could do this:
INSERT INTO logins (firstName, lastName, logins) VALUES ('Steve', 'Smith', 1)
ON DUPLICATE KEY UPDATE logins = logins + 1;
If you can't do that, then you'd have to fe...
Division of integers in Java [duplicate]
...
Convert both completed and total to double or at least cast them to double when doing the devision. I.e. cast the varaibles to double not just the result.
Fair warning, there is a floating point precision problem when working with float and double.
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