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Evaluating a mathematical expression in a string
This returns the following error:
11 Answers
11
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Why Choose Struct Over Class?
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let point = Point(x:0.0,y:2.0)
point.x = 5 //This will give compile time error.
In this case entire point is immutable constant.
If I used a class Point instead this is a valid expression. Because in a class immutable constant is the reference to the class itself not its instance variables (Unles...
Spring @Transactional - isolation, propagation
... }
Main method{
beginTransaction()
M1();
If error(){
rollbackTransaction()
}
commitTransaction();
}
}
You can debug and see the result with different values for isolation and propagation.
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The new syntax “= default” in C++11
...t m) : m(m) {} }; constexpr S1 s1 {}; constexpr S2 s2 {}; Only s1 gives an error, not s2. In both clang and g++.
– user743382
Dec 30 '13 at 12:09
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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...al checks whether the value is missing. If the value is missing, a runtime error occurs. As a result, you should always check and unwrap an implicitly unwrapped optional yourself, unless you are sure that the value cannot be missing.
...and beyond here lay
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What is the bower (and npm) version syntax?
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To be honest, it was just trial and error - I tried it and it worked! You may be correct that it's not 100% valid, but it does work.
– shacker
Mar 20 '16 at 16:00
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Non-Relational Database Design [closed]
...at everybod using the DB knows the conventions. Since you no longer get an error if you store a date in a text field, for example, and anyone can add or remove any field they feel like, you need both validation code and conventions to pick up the slack. Especially if you work with external resources...
How can I repeat a character in Bash?
...best to rearrange it from $s%.0s to %.0s$s otherwise dashes cause a printf error.
– KomodoDave
Jul 30 '14 at 7:35
6
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How to correctly close a feature branch in Mercurial?
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I tried to follow this approach, but I still get an error when trying to push: abort: push creates new remote branches:. What could I have done wrong?
– kasperd
Nov 16 '15 at 10:48
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What's wrong with using $_REQUEST[]?
...o a superglobal and not its sanitized equivalent is considered a dangerous error.
Know where you data should be coming from. Referencing my example from above, it is perfectly reasonable to allow the response format variable to be sent via GET or POST. I also allow the "action" variable to be sent ...