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Elements order in a “for (… in …)” loop
Does the "for…in" loop in Javascript loop through the hashtables/elements in the order they are declared? Is there a browser which doesn't do it in order?
The object I wish to use will be declared once and will never be modified.
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difference between foldLeft and reduceLeft in Scala
...eft will error if applied to an empty container with the following error.
java.lang.UnsupportedOperationException: empty.reduceLeft
Reworking the code to use
myList foldLeft(List[String]()) {(a,b) => a+b}
is one potential option. Another is to use the reduceLeftOption variant which return...
Why do enum permissions often have 0, 1, 2, 4 values?
...f constant-folding works in C# but it works just fine in C/C++ (as well as Java, I think).
– fluffy
Mar 22 '12 at 4:18
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Android Studio: Add jar as library?
...braries.
4.3. Click the + sign above the panel second from the left -> Java
4.4. Select your local jar and add it to the project.
You may need to run the above ./gradlew command one more time
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How do I use reflection to invoke a private method?
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Reflection dangerous? Hmmm... C# , Java, Python... actually everything is dangerous, even the world :D You just have to take care about how to do it safely...
– Legends
Feb 1 '18 at 12:19
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Distributed sequence number generation?
...Hazelcast. In it's 1.9 release it includes a Distributed implementation of java.util.concurrent.AtomicLong
You can also use Zookeeper. It provides methods for creating sequence nodes (appended to znode names, though I prefer using version numbers of the nodes). Be careful with this one though: if yo...
MySQL, Check if a column exists in a table with SQL
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The question is not how to do that using php + sql or java + sql, it's how to do that using pure sql / mysql hence the downvote
– Yuriy Nakonechnyy
Jun 18 '12 at 9:54
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Remove the error indicator from a previously-validated EditText widget
...is extension function
fun EditText.clearError() {
error = null
}
In Java:
editText.setError(null);
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How can I use a C++ library from node.js?
...fi is a Node.js addon for loading and calling dynamic libraries using pure JavaScript. It can be used to create bindings to native libraries without writing any C++ code.
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Learning Regular Expressions [closed]
... however you like.
Tools for writing and debugging regexes:
RegExr (for JavaScript)
Perl: YAPE: Regex Explain
Regex Coach (engine backed by CL-PPCRE)
RegexPal (for JavaScript)
Regular Expressions Online Tester
Regex Buddy
Regex 101 (for PCRE, JavaScript, Python, Golang)
Visual RegExp
Expresso (f...