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How did I get a value larger than 8 bits in size from an 8-bit integer?
...s extended to bit-width sizeof(int) . As I understand it, incrementing a char shouldn't ever be undefined behavior as long as sizeof(char) < sizeof(int) . But that doesn't explain how c is getting an impossible value. As an 8-bit integer, how can c hold values greater than its bit-width...
How can I negate the return-value of a process?
...ns:
!(p4 labels | grep GIT_TAG_ON_A_BRANCH)
to check that the given string is not printed by 'p4 labels'.
This is problematic, because according to POSIX:
"If the pipeline begins with the reserved word ! and command1 is a subshell command, the application shall ensure that the ( o...
Should a return statement be inside or outside a lock?
...e of the try/finally - however, the return outside the lock still requires extra locals which can't be optimised away - and takes more code...
– Marc Gravell♦
Nov 5 '08 at 21:18
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How do I do an OR filter in a Django query?
...item.moderated = False)
(edit - I was initially unsure if this caused an extra query but @spookylukey pointed out that lazy queryset evaluation takes care of that)
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Rails 3: Get Random Record
...ect_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+------+---------------+------+---------+------+--------+---------------------------------+
| 1 | SIMPLE | users | ALL | NULL | NULL | NULL | NUL...
Breakpoint on property change
... Best solution for anyone trying to debug from dev console. No extra effort to reuse on any website, awesome!
– Chris Hayes
Jul 29 at 21:16
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Class does not implement its superclass's required members
... init, like so:
convenience required init(coder: NSCoder) {
self.init(stringParam: "", intParam: 5)
}
Note the call to an initializer in self. This allows you to only have to use dummy values for the parameters, as opposed to all non-optional properties, while avoiding throwing a fatal error....
What is the difference between NULL, '\0' and 0?
... with pointers. However you may see something similar to this code:
if (!*string_pointer)
checks if the string pointer is pointing at a null character
if (*string_pointer)
checks if the string pointer is pointing at a non-null character
Don't get these confused with null pointers. Just becaus...
How to retrieve form values from HTTPPOST, dictionary or?
...
@Goose, because it is magic strings. You don't get any compile time safety. Your code will fail at runtime if you make a typo in the name of the variable whereas if you are using strong typing, the compiler will be your friend.
– D...
Java: function for arrays like PHP's join()?
I want to join a String[] with a glue string. Is there a function for this?
22 Answers
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