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When does invoking a member function on a null instance result in undefined behavior?
...d. (Notes are non-normative.)
However, one can try to deduced it from §3.10/2:
An lvalue refers to an object or function.
When dereferencing, the result is an lvalue. A null pointer does not refer to an object, therefore when we use the lvalue we have undefined behavior. The problem is that...
Can I use conditional statements with EJS templates (in JMVC)?
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StanleyZhengStanleyZheng
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An “and” operator for an “if” statement in Bash
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Try this:
if [ ${STATUS} -ne 100 -a "${STRING}" = "${VALUE}" ]
or
if [ ${STATUS} -ne 100 ] && [ "${STRING}" = "${VALUE}" ]
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CSS hide scroll bar if not needed
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answered Sep 10 '13 at 10:47
RJoRJo
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Index all *except* one item in python
...p. For example, to make b a copy of a without the 3rd element:
a = range(10)[::-1] # [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
b = [x for i,x in enumerate(a) if i!=3] # [9, 8, 7, 5, 4, 3, 2, 1, 0]
This is very general, and can be used with all iterables, including numpy arrays. If ...
Is the “struct hack” technically undefined behavior?
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edited Sep 14 '10 at 17:24
answered Sep 14 '10 at 17:18
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Why does C# have break if it's not optional? [duplicate]
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answered Jun 24 '10 at 11:29
Alex K.Alex K.
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Twig ternary operator, Shorthand if-then-else
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mgalicmgalic
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Replace a value if null or undefined in JavaScript
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Here’s the JavaScript equivalent:
var i = null;
var j = i || 10; //j is now 10
Note that the logical operator || does not return a boolean value but the first value that can be converted to true.
Additionally use an array of objects instead of one single object:
var options = {
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Is std::vector copying the objects with a push_back?
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answered Feb 16 '10 at 17:57
Alexander GesslerAlexander Gessler
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