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get name of a variable or parameter [duplicate]
I would like to get the name of a variable or parameter:
3 Answers
3
...
?? Coalesce for empty string?
... my need as well as what I ended up using:
private static string Coalesce(params string[] strings)
{
return strings.FirstOrDefault(s => !string.IsNullOrEmpty(s));
}
Usage:
string result = Coalesce(s.SiteNumber, s.AltSiteNumber, "No Number");
EDIT:
An even more compact way of writing thi...
Algorithm to get the excel-like column name of a number
...k https://vector.cool/php-number-convert-to-excel-column-letters-2
*
* @param int $num 欄數
* @param bool $uppercase 大小寫
* @return void
*/
function num_to_letters($n)
{
$n -= 1;
for ($r = ""; $n >= 0; $n = intval($n / 26) - 1)
$r = chr($n % 26 + 0x41) . $r;
...
Stop/Close webcam which is opened by navigator.getUserMedia
...Video with different browsers
For Opera 12
window.navigator.getUserMedia(param, function(stream) {
video.src =window.URL.createObjectURL(stream);
}, videoError );
For Firefox Nightly 18.0
window.navigator.mozGetUserMedia(param, function(stream...
What are the most common naming conventions in C?
...me, method name, typedef
this_is_my_convention global and local variables,
parameters, struct and union elements
thisismyconvention [optional] very local and temporary variables (such like a for() loop index)
And that's it.
It gives
class MyClass {
enum TheEnumeration {
FIRST_ELEMEN...
HashSet vs LinkedHashSet
...th the specified initial
* capacity and the specified load factor.
*
* @param initialCapacity the initial capacity of the hash map
* @param loadFactor the load factor of the hash map
* @param dummy ignored (distinguishes this
* constructor from o...
Download file from web in Python 3
...
you could use response.info().get_param('charset', 'utf-8') instead of hardcoding utf-8, to get the character encoding from Content-Type header
– jfs
Mar 19 '14 at 17:54
...
HTTP URL Address Encoding in Java
...th a query like http://www.google.com/ig/api?weather=São Paulo, use the 5-parameter version of the constructor:
URI uri = new URI(
"http",
"www.google.com",
"/ig/api",
"weather=São Paulo",
null);
String request = uri.toASCIIString();
...
Min/Max-value validators in asp.net mvc
...onRule();
rule.ErrorMessage = ErrorMessage;
rule.ValidationParameters.Add("min", _minValue);
rule.ValidationParameters.Add("max", Double.MaxValue);
rule.ValidationType = "range";
yield return rule;
}
}
...
How to check for a JSON response using RSpec?
... :success => true
}.to_json
get :action # replace with action name / params as necessary
response.body.should == @expected
EDIT
Changing this to a post makes it a bit trickier. Here's a way to handle it:
it "responds with JSON" do
my_model = stub_model(MyModel,:save=>true)
MyMo...