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How to check type of variable in Java?
...he datatype that the variable a was originally declared as or subsequently cast to.
boolean b = a instanceof String - will give you whether or not the actual object referred to by a is an instance of a specific class.
Again, the datatype that the variable a was originally declared as or subsequentl...
How can I convert a zero-terminated byte array to string?
...
Just to be clear though, this is casting a sequence of bytes to something that is hopefully a valid UTF-8 string (and not say, Latin-1 etc., or some malformed UTF-8 sequence). Go will not check this for you when you cast.
– Cameron Kerr...
How to convert a Django QuerySet to a list
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Be careful with this. When you cast this to a a list the distinct flag may become disregarded.
– rh0dium
Oct 1 '15 at 19:52
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Do interfaces inherit from Object class in java
...bject will also accept a reference of any interface type. Moreover you can cast interface to an Object implicitly without any compiler error.
– nme
Feb 10 '19 at 14:03
...
How to concatenate a std::string and an int?
...= 21;
std::string result;
// 1. with Boost
result = name + boost::lexical_cast<std::string>(age);
// 2. with C++11
result = name + std::to_string(age);
// 3. with FastFormat.Format
fastformat::fmt(result, "{0}{1}", name, age);
// 4. with FastFormat.Write
fastformat::write(result, name, age...
How to implement a custom AlertDialog View
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This should have been selected as the Best Answer.
– Salman Khakwani
Dec 31 '13 at 9:31
2
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Make copy of an array
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The cast is unnecessary; a good static analyzer will warn about it. But cloning is definitely the best way to make a new copy of an array.
– erickson
Apr 26 '11 at 4:23
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Using a Single Row configuration table in SQL Server database. Bad idea?
...iguration settings.
So when you want to retrieve the value you could do:
SELECT value FROM configurationTable
WHERE ApplicationGroup = 'myappgroup'
AND keyDescription = 'myKey';
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improve t...
What are the differences between a pointer variable and a reference variable in C++?
...t pointer's target can be replaced by taking its address and using a const cast.
A reference's target cannot be replaced in any way short of UB.
This should permit the compiler to do more optimization on a reference.
share...
Relational Database Design Patterns? [closed]
... codepages.
Give every column a unique name. This make it easer on join to select the column. It is very difficult if every table has a column "ID" or "Name" or "Description". Use XyzID and AbcID.
Use a resource bundle or equals for complex SQL expressions. It make it easer to switch to another DBMS...