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What are the disadvantages to declaring Scala case classes?
... it to a lazy val in the constructor. Unfortunately, by-name params don't mix with pattern matching, which prevents the technique being used with case classes as it breaks the compiler-generated extractor.
This is relevant if you want to implement highly-functional lazy data structures, and will ho...
If I revoke an existing distribution certificate, will it mess up anything with existing apps?
I built an iOS app for an organization that has an app already on the store. After weeks of trying to get the guy who has the key to sign the app, they finally came back and said, "Just get it done!". So I am wondering how to proceed. If I go into the provisioning portal, and revoke the dist certifi...
Shell equality operators (=, ==, -eq)
...sks (it's just causes troubles and confuses beginners), i don't get it why mixing single braces [ ... ] and double equal sign ==. :-/
– DJCrashdummy
Jan 29 at 16:59
...
What are the mechanics of short string optimization in libc++?
...flag should be used with care. It is a different ABI, and if accidentally mixed with a libc++ std::string compiled with a different setting of _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT will create run time errors.
I recommend this flag only be changed by a vendor of libc++.
...
What is the difference between JavaScript and ECMAScript?
... I've deduced, ECMAScript is the standard and JavaScript is the implementation. Is this correct?
16 Answers
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Are braces necessary in one-line statements in JavaScript?
... you will need them.
This is perfectly valid
if (cond)
alert("Condition met!")
else
alert("Condition not met!")
However it is highly recommended that you always use braces because if you (or someone else) ever expands the statement it will be required.
This same practice follows in all...
What's the difference between getPath(), getAbsolutePath(), and getCanonicalPath() in Java?
...and resolving symlinks (on unixes).
Also note the following example with nio.Paths:
String canonical_path_string = "C:\\Windows\\System32\\";
String absolute_path_string = "C:\\Windows\\System32\\drivers\\..\\";
System.out.println(Paths.get(canonical_path_string).getParent());
System.out.println(...
Check if at least two out of three booleans are true
... on Intel Core 2 + sun java 1.6.0_15-b03 with HotSpot Server VM (14.1-b02, mixed mode)):
First and second iterations:
a&&b || b&&c || a&&c : 1740 ms
a ? b||c : b&&c : 1690 ms
a&b | b&c | c&a : 835 ms
a + b + c >= 2 : 348 ms
DEAD...
What is the difference between concurrency and parallelism?
...l or concurrent programming are basically talking about Case 6. This is a mix and match of both parallel and concurrent executions.
Concurrency and Go
If you see why Rob Pike is saying concurrency is better, you have to understand that the reason is. You have a really long task in which there ar...
Is ServiceLocator an anti-pattern?
...te a composition root, whether it be Pure DI, or Containers. Also, you are mixing the use of Service Location, as being a component of your pattern, with the definition of the "Service Locator Pattern." With that definition, Composition Root DI could be considered a "Service Locator Pattern." So th...