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Oracle Differences between NVL and Coalesce
...ession "COALESCE stops at first occurrence of a non-Null value", otherwise test case No. 4 should not raise an error.
Also according to test case No. 5 COALESCE does an implicit conversion of arguments.
DECLARE
int_val INTEGER := 1;
string_val VARCHAR2(10) := 'foo';
BEGIN
BEGIN
DB...
Convert pem key to ssh-rsa format
...th ssh-keygen
ssh-keygen -t rsa -b 2048 -f dummy-ssh-keygen.pem -N '' -C "Test Key"
Converting DER to PEM
If you have an RSA key pair in DER format, you may want to convert it to PEM to allow the format conversion below:
Generation:
openssl genpkey -algorithm RSA -out genpkey-dummy.cer -outfo...
Getting the name of a variable as a string
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Somehow the function does not work in a loop: test = {} print(varname.nameof(test)) for i in [0]: print(varname.nameof(test)) The first print gives test, the print in the loop raises VarnameRetrievingError: Callee's node cannot be detected.
– Tillus...
Any way to replace characters on Swift String?
...
Did you test this :
var test = "This is my string"
let replaced = test.stringByReplacingOccurrencesOfString(" ", withString: "+", options: nil, range: nil)
...
Launch custom android application from android browser
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Tested on dev setup. Actually I was giving a wrong domain name. My bad.
– Ankit Garg
Nov 7 '13 at 9:38
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How to check if an element is in an array
... be equatable and takes a predicate as an
argument, see e.g. Shorthand to test if an object exists in an array for Swift?.
Swift older versions:
let elements = [1,2,3,4,5]
if contains(elements, 5) {
println("yes")
}
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How to count the number of files in a directory using Python
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os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name...
How to make a div with no content have a width?
...e content of the div will take no room but will force the div to display
.test1::before{
content: "\200B";
}
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How to check 'undefined' value in jQuery
...ks because val always exists (it's a function argument).
If you wanted to test an arbitrary variable that is not an argument, i.e. might not be defined at all, you'd have to use if(typeof val === 'undefined') to avoid an exception in case val didn't exist.
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Regex Email validation
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Returns test@-online.com as valid. Should be invalid.
– Mathias F
Jun 4 '13 at 14:48
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