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How and where are Annotations used in Java?
...notations such as NotNull, like in:
public void processSomething(@NotNull String text) {
...
}
which allows the compiler to warn you about improper/unchecked uses of variables and null values.
Another more advanced application for annotations involves reflection and annotation processing at ...
user authentication libraries for node.js?
...
Among all auth packages for node I selected passport. It's well-documented and easy to use, and supports more strategies.
– tech-man
May 14 '12 at 4:16
...
how to get the cookies from a php curl into a variable
...each response header line. The function will receive the curl object and a string with the header line.
You can use a code like this (adapted from TML response):
$cookies = Array();
$ch = curl_init('http://www.google.com/');
// Ask for the callback.
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "curlRe...
Reuse a parameter in String.format?
.... The first argument is referenced by "1$", the second by "2$", etc.
String.format("%1$s %1$s %1$s %1$s %1$s %1$s", hello);
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how to get the one entry from hashmap without iterating
...ution is to use TreeMap (you asked for other data structures).
TreeMap<String, String> myMap = new TreeMap<String, String>();
String first = myMap.firstEntry().getValue();
String firstOther = myMap.get(myMap.firstKey());
TreeMap has an overhead so HashMap is faster, but just as an exa...
Java regex capturing groups indexes
...oup numbers are used in back-reference \n in pattern and $n in replacement string.
In other regex flavors (PCRE, Perl), they can also be used in sub-routine calls.
You can access the text matched by certain group with Matcher.group(int group). The group numbers can be identified with the rule stat...
Which types can be used for Java annotation members?
...n 9.6.1 of the JLS. The annotation member types must be one of:
primitive
String
an Enum
another Annotation
Class
an array of any of the above
It does seem restrictive, but no doubt there are reasons for it.
Also note that multidimensional arrays (e.g. String[][]) are implicitly forbidden by the a...
Kotlin: how to pass a function as parameter to another?
...
Use :: to signify a function reference, and then:
fun foo(m: String, bar: (m: String) -> Unit) {
bar(m)
}
// my function to pass into the other
fun buz(m: String) {
println("another message: $m")
}
// someone passing buz into foo
fun something() {
foo("hi", ::buz)
}
...
How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
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You must cast your integers as string when trying to concatenate them into a varchar.
i.e.
SELECT @ActualWeightDIMS = CAST(@Actual_Dims_Lenght AS varchar(10))
+ 'x' +
CAST(@Actual_Dims_Width ...
Regex Last occurrence?
...r test needed. It changes the meaning of the the $. Standard is end of the string, with Multiline its end of the row. Because the test text in Regexr has multiple rows I need this option there.
– stema
Dec 4 '11 at 12:20
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