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Differences in auto-unboxing between Java 6 vs Java 7
...is explained in this email:
Bottom line: If the spec. allows (Object)(int) it must also be allowing (int)(Object).
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...just like the old hashes; there's no reason (other than style, perhaps) to convert them.
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Android NDK C++ JNI (no implementation found for native…)
...t: you can't use '_' (underscores) in function names since underscores are intepreted as package separator. So , only camel case function names are possible
– Nulik
Dec 12 '18 at 21:27
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How to choose the id generation strategy when using JPA and Hibernate
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The API Doc are very clear on this.
All generators implement the interface org.hibernate.id.IdentifierGenerator. This is a very simple interface. Some applications can choose to provide their own specialized implementations, however, Hibernate provides a range of built-in implementations. ...
What to do about Eclipse's “No repository found containing: …” error messages?
...20917-0436 No
repository found containing:
osgi.bundle,org.eclipse.emf.converter,2.5.0.v20120917-0436 No
repository found containing:
osgi.bundle,org.eclipse.emf.databinding,1.2.0.v20120917-0436 No
repository found containing:
osgi.bundle,org.eclipse.emf.databinding.edit,1.2.0.v20120917-...
How to remove part of a string? [closed]
...44 here";
$s = explode(" ",$string);
unset($s[1]);
$s = implode(" ",$s);
print "$s\n";
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Split comma-separated strings in a column into separate rows
... use separate_rows:
separate_rows(v, director, sep = ",")
You can use the convert = TRUE parameter to automatically convert numbers into numeric columns.
4) with base R:
# if 'director' is a character-column:
stack(setNames(strsplit(df$director,','), df$AB))
# if 'director' is a factor-column:
sta...
Java, How do I get current index/key in “for each” loop [duplicate]
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You can't, you either need to keep the index separately:
int index = 0;
for(Element song : question) {
System.out.println("Current index is: " + (index++));
}
or use a normal for loop:
for(int i = 0; i < question.length; i++) {
System.out.println("Current index is: " ...
What does void mean in C, C++, and C#?
...tals on where the term " void " comes from, and why it is called void. The intention of the question is to assist someone who has no C experience, and is suddenly looking at a C-based codebase.
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How to get values from IGrouping
...e<TElement>, you can use SelectMany to put all the IEnumerables back into one IEnumerable all together:
List<smth> list = new List<smth>();
IEnumerable<IGrouping<int, smth>> groups = list.GroupBy(x => x.id);
IEnumerable<smth> smths = groups.SelectMany(group =&...