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How can I count the number of matches for a regex?
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177
matcher.find() does not find all matches, only the next match.
Solution for Java 9+
long mat...
How to add one day to a date? [duplicate]
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18 Answers
18
Active
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How to count occurrences of a column value efficiently in SQL?
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edited Oct 1 '09 at 16:38
answered Oct 1 '09 at 13:30
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How to recursively find the latest modified file in a directory?
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21 Answers
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Use RSA private key to generate public key?
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openssl genrsa -out mykey.pem 1024
will actually produce a public - private key pair. The pair is stored in the generated mykey.pem file.
openssl rsa -in mykey.pem -pubout > mykey.pub
will extract the public key and print that out. Here is a link ...
SQL standard to escape column names?
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Quotation Mark "
The SQL:1999 standard specifies that double quote (") (QUOTATION MARK) is used to delimit identifiers.
<delimited identifier> ::= <double quote> <delimited identifier body> <double quote>
Oracle, PostgreSQL...
How to prevent browser page caching in Rails
...se.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end
Rails 4 and older versions:
class ApplicationController < ActionController::Base
before_filter :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Con...
Difference between JAX-WS, Axis2 and CXF
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144
The JAX-WS implementation built into the JDK really is just the basic soap stuff. If you need...
Booleans, conditional operators and autoboxing
...l() method affects the static typing of the expressions at compile time:
E1: `true ? returnsNull() : false` - boolean (auto-unboxing 2nd operand to boolean)
E2: `true ? null : false` - Boolean (autoboxing of 3rd operand to Boolean)
See Java Language Specification, section 15.25 Conditional Opera...