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What does the Reflect object do in JavaScript?
...rototype object (19.1.3).
The Reflect object is not a function object. It does not have a [[Construct]] internal method; it is not possible to use the Reflect object as a constructor with the new operator. The Reflect object also does not have a [[Call]] internal method; it is not possible to invok...
Correct format specifier to print pointer or address?
..., and the letters could be in lower-case or upper-case, and the C standard doesn't even define that it shall be hexadecimal output though I know of no implementation where it is not.
It is somewhat open to debate whether you should explicitly convert the pointers with a (void *) cast. It is being ...
Does order of where clauses matter in SQL?
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No, that order doesn't matter (or at least: shouldn't matter).
Any decent query optimizer will look at all the parts of the WHERE clause and figure out the most efficient way to satisfy that query.
I know the SQL Server query optimizer wi...
Why does my Spring Boot App always shutdown immediately after starting?
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Resolution: the app is not a webapp because it doesn't have an embedded container (e.g. Tomcat) on the classpath. Adding one fixed it. If you are using Maven, then add this in pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<...
Java default constructor
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I actually just had the question "does the default constructor initialize the instance members of the class" in the OCA certification exam, and the answer was no.
– eis
Dec 2 '13 at 20:07
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REST API 404: Bad URI, or Missing Resource?
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Use 404 if the resource does not exist. Don't return 200 with an empty body.
This is akin to undefined vs empty string (e.g. "") in programming. While very similar, there is definitely a difference.
404 means that nothing exists at that URI (lik...
How does JavaFX compare to WPF? [closed]
... expression is now invalid and needs to be recalculated; the recalculation does not actually occur until you request the property value via its get() or getValue() methods. If you have registered a change listener, however, then the expression will be re-evaluated immediately and anything that is bo...
How does free know how much to free?
...ing, you can pass any kind of pointer you like as an argument to free, how does it know the size of the allocated memory to free? Whenever I pass a pointer to some function, I have to also pass the size (ie an array of 10 elements needs to receive 10 as a parameter to know the size of the array), bu...
How does @synchronized lock/unlock in Objective-C?
Does @synchronized not use "lock" and "unlock" to achieve mutual exclusion? How does it do lock/unlock then?
5 Answers
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Why does typeof NaN return 'number'?
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Why does Infinity === Infinity return true if an Infinity can be produced by different values: 1.0 / 0.0 or 2.0 / 0.0?
– Hashem Qolami
May 22 '16 at 9:15
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