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What does an exclamation mark mean in the Swift language?
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What does it mean to "unwrap the instance"? Why is it necessary?
As far as I can work out (this is very new to me, too)...
The term "wrapped" implies we should think of an Optional variable as a present, wrapped in shiny paper, which might (sadly!) be empty.
When "wrap...
How do cache lines work?
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If the cache line containing the byte or word you're loading is not already present in the cache, your CPU will request the 64 bytes that begin at the cache line boundary (the largest address below the one you need that is multiple of 64).
Modern PC memory modules transfer 64 bits (8 ...
What is the difference between HTTP and REST?
...bout the differences between REST and SOAP, I got the impression that REST is just another word for HTTP. Can someone explain what functionality REST adds to HTTP?
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Does Python have a ternary conditional operator?
If Python does not have a ternary conditional operator, is it possible to simulate one using other language constructs?
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Difference between encoding and encryption
What is the difference between encoding and encryption?
10 Answers
10
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What actually causes a Stack Overflow error? [duplicate]
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It seems you're thinking that a stackoverflow error is like a buffer overflow exception in native programs, when there is a risk of writing into memory that had not been allocated for the buffer, and thus to corrupt some other memory locations. It's not the case at all.
JVM h...
How can you determine a point is between two other points on a line segment?
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Check if the cross product of (b-a) and (c-a) is 0, as tells Darius Bacon, tells you if the points a, b and c are aligned.
But, as you want to know if c is between a and b, you also have to check that the dot product of (b-a) and (c-a) is positive and is less than the s...
When should we use mutex and when should we use semaphore
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Here is how I remember when to use what -
Semaphore:
Use a semaphore when you (thread) want to sleep till some other thread tells you to wake up. Semaphore 'down' happens in one thread (producer) and semaphore 'up' (for same sem...
Is Python interpreted, or compiled, or both?
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First off, interpreted/compiled is not a property of the language but a property of the implementation. For most languages, most if not all implementations fall in one category, so one might save a few words saying the language is interpreted/compiled too, ...
What is object serialization?
What is meant by "object serialization"? Can you please explain it with some examples?
14 Answers
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