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Pick a random value from an enum?
... private final E[] values;
public RandomEnum(Class<E> token) {
values = token.getEnumConstants();
}
public E random() {
return values[RND.nextInt(values.length)];
}
}
}
Edit: Oops, I forgot the bounded type parameter, <E ...
Best practice for storing and protecting private API keys in applications [closed]
...mote attestation techniques), and it receives a time limited (usually JWT) token signed by the secret.
The token is sent with each API call where the endpoint can verify its signature before acting on the request.
The actual secret is never present on the device; in fact, the app never has any id...
Is int[] a reference type or a value type?
...bject. This means that
all arrays are always reference types
which are allocated on the managed
heap, and your app's variable contains
a reference to the array and not the
array itself.
https://msdn.microsoft.com/en-us/library/bb985948.aspx
...
iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，网页等等
<UIWebViewDelegate>
UIWebView *webView = [[UIWebView alloc]initWithFrame:self.view.bounds];
webView.delegate = self;
webView.scalesPageToFit = YES;
webView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[webView setAllowsInlineMediaPl...
Why would I prefer using vector to deque
...e difference one should know how deque is generally implemented. Memory is allocated in blocks of equal sizes, and they are chained together (as an array or possibly a vector).
So to find the nth element, you find the appropriate block then access the element within it. This is constant time, beca...
How to create a file with a given size in Linux?
...a huge blocksize will perform much worse once it gets very big, as it will allocate and read that amount into memory before writing. If this is somethig like bs=4GiB you'll probably end up swapping.
– Brian
Sep 29 '08 at 7:40
...
What is Pseudo TTY-Allocation? (SSH and Github)
...
As explained in "gitolite: PTY allocation request failed on channel 0", it is important to do ssh test connection with -T, because some server could abort the transaction entirely if a text-terminal (tty) is requested.
-T avoids requesting said terminal, ...
UIPopovercontroller dealloc reached while popover is still visible
...ne and iPad):
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.allowsEditing = YES;
picker.modalPresentationStyle = UIModalPresentationPopover;
UIPopoverPresentationController* popov...
Split string in Lua?
...
If you just want to iterate over the tokens, this is pretty neat:
line = "one, two and 3!"
for token in string.gmatch(line, "[^%s]+") do
print(token)
end
Output:
one,
two
and
3!
Short explanation: the "[^%s]+" pattern matches to every non-empty string in ...
Setting direction for UISwipeGestureRecognizer
...
UISwipeGestureRecognizer *swipeLeftRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleGesture:)];
[swipeLeftRight setDirection:(UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft )];
[self.view addGestureRecognizer:swipeLeftR...