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error: ‘NULL’ was not declared in this scope
..., which is implemented in GCC since version 4.6. nullptr is not implicitly convertible to integral types, so it can be used to disambiguate a call to a function which has been overloaded for both pointer and integral types:
void f(int x);
void f(void * ptr);
f(0); // Passes int 0.
f(nullptr); //...
Cannot add or update a child row: a foreign key constraint fails
...roblem, thanks for the tip. Here's a link to MySQL documentation on how to convert tables from MyISAM to InnoDB dev.mysql.com/doc/refman/5.7/en/… TLDR: ALTER TABLE table_name ENGINE=InnoDB;
– Guilherme Vaz
Sep 25 '17 at 20:41
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How can I convert ereg expressions to preg in PHP?
...ns (ereg) are deprecated since PHP 5.3.0, I'd like to know an easy way to convert the old expressions to PCRE (Perl Compatible Regular Expressions) (preg) .
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How to convert IEnumerable to ObservableCollection?
How to convert IEnumerable to ObservableCollection ?
5 Answers
5
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Convert String to double in Java
How can I convert a String such as "12.34" to a double in Java?
15 Answers
15
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Why is there no Convert.toFloat() method?
Why there is not exist method Convert.ToFloat() ,C# has ToDouble() , ToDecimal() ... I want convert to float, which method can be used? (float)var?
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Gson: Directly convert String to JsonObject (no POJO)
...ipulation in GSON, but I have a case where I do not know or have a POJO to convert a string into, prior to converting to JsonObject . Is there a way to go directly from a String to JsonObject ?
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Converting XDocument to XmlDocument and vice versa
...as a XmlDocument class.
And I have an XmlDocument variable which I need to convert back to XDocument to append more nodes.
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Convert Pixels to Points
I have a need to convert Pixels to Points in C#. I've seen some complicated explanations about the topic, but can't seem to locate a simple formula. Let's assume a standard 96dpi, how do I calulate this conversion?
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NULL values inside NOT IN clause
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Has anybody ever pointed out that converting NOT IN to a series of <> and changes the semantic behavior of not in this set to something else?
– Ian Boyd
Oct 13 '10 at 14:47
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