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What does “all” stand for in a makefile?
I read some tutorials concerning Makefiles but for me it is still unclear for what the target "all" stands for and what it does.
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Validate uniqueness of multiple columns
Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model / table should not be able to have multiple identical records like:
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What's the difference between @Secured and @PreAuthorize in spring security 3?
It's not clear for me what is the difference in spring security between :
5 Answers
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How to create a protocol with methods that are optional?
I noticed methods marked optional in several protocols defined in the iPhone SDK, such as the UIActionSheetDelegate protocol for example.
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What is the difference between a mutable and immutable string in C#?
What is the difference between a mutable and immutable string in C#?
15 Answers
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String to LocalDate
How can i convert a string to a LocalDate ?
5 Answers
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Meaning of Open hashing and Closed hashing
Open Hashing (Separate Chaining):
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Why are there two build.gradle files in an Android Studio project?
After having imported an Eclipse project into Android Studio, I see two build.gradle files:
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What is & used for
Is there any difference in behaviour of below URL.
5 Answers
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XML Schema minOccurs / maxOccurs default values
I'm wondering how the XML Schema specification handles these cases:
4 Answers
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