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What is meant by immutable?
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return this.myvar;
}
}
Foo doesn't have to worry that the caller to getValue() might change the text in the string.
If you imagine a similar class to Foo, but with a StringBuilder rather than a String as a member, you can see that a caller to getValue() would be able to alter the S...
How to turn NaN from parseInt into 0 for an empty string?
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Why call parseInt(s) twice? Furthermore it should be parseInt(s, 10)
– Dexygen
Oct 1 '15 at 16:32
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Why is String immutable in Java?
...ble for several reasons, here is a summary:
Security: parameters are typically represented as String in network connections, database connection urls, usernames/passwords etc. If it were mutable, these parameters could be easily changed.
Synchronization and concurrency: making String immutable au...
Thou shalt not inherit from std::vector
...new data members of MyVector will not be copied. The same would be true of calling swap through a base pointer/reference. I tend to think any kind of inheritance hierarchy that risks object slicing is a bad one.
– stinky472
Sep 30 '12 at 22:14
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What REALLY happens when you don't free after malloc?
...an object when you're done with it will mean the destructor will never get called, and any resources the class is responsible might not get cleaned up.
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Setting up maven dependency for SQL Server
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Download the driver JAR from the link provided by Olaf and add it to your local Maven repository with;
mvn install:install-file -Dfile=sqljdbc4.jar -DgroupId=com.microsoft.sqlserver -DartifactId=sqljdbc4 -Dversion=4.0 -Dpackaging=jar
Then add it to your project wit...
How can I color Python logging output?
...er class adds a handler to every logger created, which is not what you typically want.
– Vinay Sajip
Aug 17 '09 at 12:17
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What is the bit size of long on 64-bit Windows?
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@TomFobear: ILP64 presents one major issue - what do you call the 32-bit type? Or, if you call the 32-bit type short, what do you call the 16-bit type? And if you call the 16-bit type char for UTF-16 etc, what do you call the 8-bit type? So, using LP64 leaves you with 8-bit char, 1...
Why is IoC / DI not common in Python?
... vanishes.
(Here's a brief aside for an analogy: in assembly, a subroutine call is a pretty major deal - you have to save your local variables and registers to memory, save your return address somewhere, change the instruction pointer to the subroutine you are calling, arrange for it to somehow jump...
Try-catch speeding up my code?
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You missed your opportunity to call it a "JITter bug".
– mbomb007
Nov 17 '17 at 20:58
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