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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...
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 ...
How to redirect output of an already running process [duplicate]
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136
See Redirecting Output from a Running Process.
Firstly I run the command cat > foo1 in ...
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...
Use dynamic variable names in JavaScript
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17 Answers
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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...
Windows batch: formatted date into variable
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17 Answers
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Active
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How to convert a negative number to positive?
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216
>>> n = -42
>>> -n # if you know n is negative
42
>>> abs(n) ...
Simulator error FBSSystemServiceDomain code 4
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edited Dec 1 '14 at 11:23
Umar Farooq
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