Access-Control-Allow-Origin is a CORS (Cross-Origin Resource Sharing) header. When Site A tries to fetch content from Site B, Site B can send an Access-Control-Allow-Origin response header to tell the browser that the content of this page is accessible to certain origins. (An origin is a domain, plus a scheme and port number.) By default, Site … Read more
You would want and instead of &&.
Note that if you need to use i.remove(); in your loop, or access the actual iterator in some way, you cannot use the for ( : ) idiom, since the actual iterator is merely inferred. As was noted by Denis Bueno, this code works for any object that implements the Iterable interface. Note that if … Read more
The above is not correct (syntax error). It means you are assigning an array to data[10] which can hold just an element. If you want to initialize an array, try using Array Initializer: Notice the difference between the two declarations. When assigning a new array to a declared variable, new must be used. Even if … Read more
In Python 3, you can use the sep= and end= parameters of the print function: To not add a newline to the end of the string: To not add a space between all the function arguments you want to print: You can pass any string to either parameter, and you can use both parameters at … Read more
That’s the “forall” (for all) symbol, as seen in Wikipedia’s table of mathematical symbols or the Unicode forall character (\u2200, ∀).
Short Answer It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend to. Here are some common problems when the guard is omitted from a script: If you import the guardless script in another script (e.g. import my_script_without_a_name_eq_main_guard), then the second script will trigger the first to run at import … Read more
There appears to be no way to do this, however there are ways to approximate what you’re looking for. See here for ideas. The basic ideas from those pages are to use the most recent uploads feed (if you don’t care about when something was uploaded) or simply get a dump of ALL youtube videos … Read more
Warning: this doesn’t work for arrays of primitives (see the comments). Since java-8 you can now use Streams. To check whether an array of int, double or long contains a value use IntStream, DoubleStream or LongStream respectively. Example
Close: first you call ExcelFile, but then you call the .parse method and pass it the sheet name. What you’re doing is calling the method which lives on the class itself, rather than the instance, which is okay (although not very idiomatic), but if you’re doing that you would also need to pass the sheet … Read more