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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...
WebAPI Multiple Put/Post parameters
...
[HttpPost]
public string MyMethod([FromBody]JObject data)
{
Customer customer = data["customerData"].ToObject<Customer>();
Product product = data["productData"].ToObject<Product>();
Employee employee = data["employeeDat...
How to check if a specified key exists in a given S3 bucket using Java
... new AmazonS3Client(new ClasspathPropertiesFileCredentialsProvider());
String bucketName = getBucketName();
s3.createBucket(bucketName);
S3Object object = s3.getObject(bucketName, getKey());
} catch (AmazonServiceException e) {
String errorCode = e.getErrorCode();
if (!errorCode....
How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
...
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 ...
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)
}
...
Performance of foreach, array_map with lambda and array_map with static function
...
}
return $result;
}
function useMapClosure($numbers) {
return array_map(function($number) {
return $number * 10;
}, $numbers);
}
function _tenTimes($number) {
return $number * 10;
}
function useMapNamed($numbers) {
return array_map('_tenTimes', $numbers);
}
foreach (array('F...
Combine --user with --prefix error with setup.py install
...me workaround:
pip install --user --install-option="--prefix=" <package_name>
or
python setup.py install --user --prefix=
Note that there is no text (not even whitespace) after the =.
Do not forget the --user flag.
Installing multiple packages:
Create ~/.pydistutils.cfg (or equivalent...
Reuse a parameter in String.format?
.... The first argument is referenced by "1$", the second by "2$", etc.
String.format("%1$s %1$s %1$s %1$s %1$s %1$s", hello);
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convert streamed buffers to utf8-string
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Single Buffer
If you have a single Buffer you can use its toString method that will convert all or part of the binary contents to a string using a specific encoding. It defaults to utf8 if you don't provide a parameter, but I've explicitly set the encoding in this example.
var req = ...
PostgreSQL: How to make “case-insensitive” query
...
Use LOWER function to convert the strings to lower case before comparing.
Try this:
SELECT id
FROM groups
WHERE LOWER(name)=LOWER('Administrator')
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