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Why does Double.NaN==Double.NaN return false?
...d number is a
* Not-a-Number (NaN) value, {@code false} otherwise.
*
* @param v the value to be tested.
* @return {@code true} if the value of the argument is NaN;
* {@code false} otherwise.
*/
static public boolean isNaN(double v) {
return (v != v);
}
Solution
What you ...
Can you use reflection to find the name of the currently executing method?
...ke this:
public static T CreateWrapper<T>(Exception innerException, params object[] parameterValues) where T : Exception, new()
{
if (parameterValues == null)
{
parameterValues = new object[0];
}
Exception exception = null;
StringBuilder builder = new StringBuil...
mongodb: insert if not exists
... to do an "upsert". MongoDB has built-in support for this. Pass an extra parameter to your update() call: {upsert:true}. For example:
key = {'key':'value'}
data = {'key2':'value2', 'key3':'value3'};
coll.update(key, data, upsert=True); #In python upsert must be passed as a keyword argument
Th...
Utils to read resource text file to String (Java) [closed]
...g Java 8 or greater:
/**
* Reads given resource file as a string.
*
* @param fileName path to the resource file
* @return the file's contents
* @throws IOException if read fails for any reason
*/
static String getResourceFileAsString(String fileName) throws IOException {
ClassLoader class...
send/post xml file using curl command line
...myhost:myport/path/of/url
Read the manpage. following an abstract for -d Parameter.
-d/--data
(HTTP) Sends the specified data in a
POST request to the HTTP server, in
the same way that a browser does when
a user has filled in an HTML form and
presses the submit button. This will
...
Using jquery to get element's position relative to viewport
...*
* Calculates the position of a given element within the viewport
*
* @param {string} obj jQuery object of the dom element to be monitored
* @return {array} An array containing both X and Y positions as a number
* ranging from 0 (under/right of viewport) to 1 (above/left of viewport)
*/
funct...
How do I load an HTML page in a using JavaScript?
...xt and then feeds it to the innerHTML of your container element.
/**
* @param {String} url - address for the HTML to fetch
* @return {String} the resulting HTML string fragment
*/
async function fetchHtmlAsText(url) {
return await (await fetch(url)).text();
}
// this is your `load_home()...
What is “String args[]”? parameter in main method Java
... -> is the name of an array it can be anything (e.g. a, ar, argument, param, parameter) no issues with compiler & executed & I tested as well.
E.g.
1)public static void main(String[] argument)
2)public static void main(String[] parameter)
When would you use these args?
Ans->
The...
What is the easiest way to duplicate an activerecord record?
...Controller < ActionController
def some_method
my_post = Post.find(params[:id])
new_post = my_post.dup
new_post.save
end
end
You can also control which fields get copied in numerous ways, but for example, if you wanted to prevent comments from being duplicated but you wanted to m...
Safe String to BigDecimal conversion
... front or in the end will be interpreted as negative number
*
* @param value
* @return The BigDecimal expression of the given string
*/
public static BigDecimal toBigDecimal(final String value) {
if (value != null){
boolean negativeNumber = false;
...