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How do you detect Credit card type based on number?
...1|1800|35\d{3})\d{11}$/
}
for(var key in re) {
if(re[key].test(number)) {
return key
}
}
}
Unit test:
describe('CreditCard', function() {
describe('#detectCardType', function() {
var cards = {
'8800000000000000': 'UNIONPAY',
...
How do I specify new lines on Python, when writing on files?
...ch is easier.
Example 1
Input
line1 = "hello how are you"
line2 = "I am testing the new line escape sequence"
line3 = "this seems to work"
You can write the '\n' separately:
file.write(line1)
file.write("\n")
file.write(line2)
file.write("\n")
file.write(line3)
file.write("\n")
Output
hello...
Set up DNS based URL forwarding in Amazon Route53 [closed]
....com, instead of myaccount.signin.aws.amazon.com. If you click the link to test the Endpoint URL, AWS will happily redirect your browser to the wrong address!
After noticing your mistake, you will probably edit the <Hostname> in your Redirection Rules to fix the error. Unfortunately, when you...
sql query to return differences between two tables
... xml, @Data2 xml
select @Data1 =
(
select *
from (select * from Test1 except select * from Test2) as a
for xml raw('Data')
)
select @Data2 =
(
select *
from (select * from Test2 except select * from Test1) as a
for xml raw('Data')
)
;with CTE1 as (
select
T...
Else clause on Python while statement
..." expression ":" suite
["else" ":" suite]
This repeatedly tests the expression and, if it is true, executes the first suite; if the expression is false (which may be the first time it is tested) the suite of the else clause, if present, is executed and the loop terminates.
A break s...
How might I find the largest number contained in a JavaScript array?
... FWIW, if performance is a factor in your solution, I would test that compared to your own easily-coded function to make sure it performs well. We tend to assume that the native implementation will be faster; in fact, the cost of the apply call can wash that out very easily.
...
How do I check if a number evaluates to infinity?
...
@Eli: In my tests Number.POSITIVE_INFINITY and Number.NEGATIVE_INFINITY are read-only (tested on Chrome8, FF3.6 and IE8). Using 1/0 works fine but it won't be so obvious to maintainers of your code what you're actually trying to test for...
Open file dialog box in JavaScript
...
Though I haven't tested it enough, "visibility: hidden;" seems more compatible. In addition, despite the opacity: 0 a click event will trigger if the "invisible" element clicked, while visibility: hidden will not.
– Aron...
The import org.junit cannot be resolved
I need to solve a java problem for an interview, and they have sent me the test class. It starts with
13 Answers
...
What's the difference between a proc and a lambda in Ruby?
...of a lambda triggers the code right outside of the lambda code
def lambda_test
lam = lambda { return }
lam.call
puts "Hello world"
end
lambda_test # calling lambda_test prints 'Hello World'
‘return’ inside of a proc triggers the code outside of the method where the proc...