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Detecting an “invalid date” Date instance in JavaScript
...
Here's how I would do it:
if (Object.prototype.toString.call(d) === "[object Date]") {
// it is a date
if (isNaN(d.getTime())) { // d.valueOf() could also work
// date is not valid
} else {
// date is valid
}
} else {
// not a date
}
Update [2018-05-31]...
#ifdef #ifndef in Java
...correct? What about the case where we have a bunch of private static final Strings that we'd like to set. (e.g. a set of server URLs that are set differently for production vs. staging)
– tomwhipple
Nov 19 '11 at 0:41
...
Creating a simple XML file using python
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@YonatanSimson I don't know how to add that exact string, since ElementTree seems to only obey xml_declaration=True if you specify an encoding... but, to get equivalent behaviour, call tree.write() like this: tree.write("filename.xml", xml_declaration=True, encoding='utf-8')...
Java unchecked: unchecked generic array creation for varargs parameter
...the implicit creation of an array at the calling site. So
List<List<String>> combinations =
Utils.createCombinations(cocNumbers, vatNumbers, ibans);
is actually
List<List<String>> combinations =
Utils.createCombinations(new List<String>[]{cocNumbers, vatNumb...
Is arr.__len__() the preferred way to get the length of an array in Python?
...The same works for tuples:
my_tuple = (1,2,3,4,5)
len(my_tuple)
# 5
And strings, which are really just arrays of characters:
my_string = 'hello world'
len(my_string)
# 11
It was intentionally done this way so that lists, tuples and other container types or iterables didn't all need to explicit...
How to use NSJSONSerialization
I have a JSON string (from PHP's json_encode() that looks like this:
12 Answers
12
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appending array to FormData and send via AJAX
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You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Serialize the data with, the...
How to pass an ArrayList to a varargs method parameter?
...y for no reason.)
Here's a complete example:
public static void method(String... strs) {
for (String s : strs)
System.out.println(s);
}
...
List<String> strs = new ArrayList<String>();
strs.add("hello");
strs.add("wordld");
method(strs.toArray(new String...
Passing $_POST values with cURL
...e);
curl_setopt($handle, CURLOPT_POSTFIELDS, $data);
$data as url encoded string: The data will be sent as application/x-www-form-urlencoded, which is the default encoding for submitted html form data.
$data = array('name' => 'Ross', 'php_master' => true);
curl_setopt($handle, CURLOPT_POSTFI...
Accessing MVC's model property from Javascript
... to JavaScript variable.
Property assignment - Basic datatypes like int, string, DateTime (ex: Model.Name)
Object assignment - Custom or inbuilt classes (ex: Model, Model.UserSettingsObj)
Lets look into the details of these two assignments.
For the rest of the answer lets consider the below Ap...