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Is volatile expensive?
...Cookbook for Compiler Writers about the implementation of volatile, especially section "Interactions with Atomic Instructions" I assume that reading a volatile variable without updating it needs a LoadLoad or a LoadStore barrier. Further down the page I see that LoadLoad and LoadStore are effective...
How does variable assignment work in JavaScript?
..., will modify the object that a points to. This, of course, also modifies all other references that point to this object simply because they all point to the same object.
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How to use OR condition in a JavaScript IF statement?
... Just much better to use .toLowerCase() instead of having to check all different case variants.
– AquaAlex
Sep 18 '15 at 15:51
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How to use the toString method in Java?
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object. In general, the toString
method returns a string that
"textually represents" this object.
The result should be a concise but
informative representation that is
easy for a person to read. It is
recommended that all subclasses
override this method.
The toString method fo...
Node.js check if path is file or directory
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Note that the asynchronous version is usually preferable if you care about general app performance.
– AlexMA
Mar 14 '14 at 20:10
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How to print like printf in Python3?
... inline interpolation. What's even nicer is it extended the syntax to also allow format specifiers with interpolation. Something I've been working on while I googled this (and came across this old question!):
print(f'{account:40s} ({ratio:3.2f}) -> AUD {splitAmount}')
PEP 498 has the details. ...
Is Java really slow?
...my opinion, this is the main reason Java still has a bad reputation, especially server-side. This makes the String problems exponentially worse. Some simple mistakes are common: objects are often used in place of primitives, reducing performance and increasing memory use. Many Java libraries (includ...
C++ IDE for Macs [closed]
...dering between Xcode and Eclipse. Xcode's layout, however, is weird. Especially if he was using Visual C++ to teach the class. Eclipse or Netbeans would be a much better option.
– michael.bartnett
Dec 6 '10 at 6:22
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SQL - Rounding off to 2 decimal places
...the round v cast on its own. The convert to numeric doesn't do rounding in all engines so if the calculated number was 10.809 you would get 10.80 rather than the 10.81 the question required.
– u07ch
Aug 26 '14 at 7:47
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Getting the first index of an object
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For a one liner to work in all browsers including IE8 and below use for (var key in obj) if (obj.hasOwnProperty(key)) break; You'll then want to use the key variable
– Ally
Sep 6 '13 at 16:23
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