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How to implement an abstract class in ruby?
I know there is no concept of abstract class in ruby. But if at all it needs to be implemented, how to go about it? I tried something like...
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What does “Object reference not set to an instance of an object” mean? [duplicate]
I am receiving this error and I'm not sure what it means?
8 Answers
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Browser detection in JavaScript? [duplicate]
... this will tell you the name and version number supplied by the browser.
It is handy for sorting test and error results, when you are testing new code on multiple browsers.
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Why are elementwise additions much faster in separate loops than in a combined loop?
...ame cache way. However, Intel processors have had 8-way L1 cache associativity for a while. But in reality, the performance isn't completely uniform. Accessing 4-ways is still slower than say 2-ways.
EDIT: It does in fact look like you are allocating all the arrays separately.
Usually when such larg...
Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?
... FOR loop is static in nature; you cannot modify the loop variable between iterations, unlike the for(initialization;condition;increment) loop structure in other languages. This means that the following code always prints 1, 2, 3, 4, 5 regardless of the value of B.
A = 1:5;
for i = A
A = B;
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Run batch file as a Windows service
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+1 Never heard of this one but it very nice. NSSM does not suck indeed!
– Byron Whitlock
Jan 27 '13 at 22:17
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SQL to determine minimum sequential days of access?
...y table contains one record for every day a given user has accessed a website (in a 24 hour UTC period). It has many thousands of records, but only one record per day per user. If the user has not accessed the website for that day, no record will be generated.
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How does the “final” keyword in Java work? (I can still modify an object.)
In Java we use final keyword with variables to specify its values are not to be changed.
But I see that you can change the value in the constructor / methods of the class. Again, if the variable is static then it is a compilation error.
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Interface type check with Typescript
This question is the direct analogon to Class type check with TypeScript
16 Answers
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What is the difference between inversedBy and mappedBy?
...directional assocation.
The owning side of a OneToOne assocation is the entity with the table containing the foreign key.
See https://www.doctrine-project.org/projects/doctrine-orm/en/latest/reference/unitofwork-associations.html
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