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What is the difference between -viewWillAppear: and -viewDidAppear:?
... think viewWillAppear/viewDidAppear will fire. Put a break point there and test it. It doesn't fire. So, if something has changed for your app while it was in the background you'll need to update that using notifications.
sh...
Check if value already exists within list of dictionaries?
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Is there a possibility to test if 'main_color': 'red' AND 'second_color':'blue' exist ?
– Florent
May 7 '18 at 23:19
1
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Is it possible to use jQuery .on and hover?
...($) {
//append div to document body
$('<div class="selector">Test</div>').appendTo(document.body);
}(jQuery));
The above code for .on() would not stand. Instead, you should modify your code slightly, like this:
$(document).on({
mouseenter: function () {
//stuff to...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
...value you pass on your
Session.get() call. (Note that I haven't actually tested this code, so
it may need some quick debugging, I just wrote it straight into the
GitHub window.)
2. Use a fork of requests from kevinburke: https://github.com/kevinburke/requests/tree/connect-timeout
From its d...
An invalid form control with name='' is not focusable
...
This problem may arise when a page is built & tested with a browser that doesn't support clientside validation or doesn't prevent the form submission (see Safari). The next developer or user with a browser that actually prevents form submission on clientside errors (see ...
Should a retrieval method return 'null' or throw an exception when it can't produce the return value
...e two routines. One routine throws an exception and the other is a boolean test routine that returns the object in an output parameter and the routine returns a false if the object was not found.
It's hard to misuse a Try routine. It's real easy to forget to check for null.
So when null is an erro...
Get type of a generic parameter in Java with reflection
...class() and get values for ourselves as a concrete type (caveat: I haven't tested these scenarios, they haven't come up for me yet).
It gets tricky if your concrete children are be an arbitrary number of hops away, or if you're concrete and not final, and especially tricky if you expect any of your...
Should I index a bit field in SQL Server?
...rmance gain vs. keeping the index up to date.
The reason everyone says to test is because SQL contains a very clever and complex optimizer that may ignore an index if it decides table scanning is faster, or may use a sort, or may organize memory pages however it darn well likes.
...
Jump to function definition in vim
...ana/vim-textobj-user'
\| Plug 'glts/vim-textobj-comment'
Plug 'janko/vim-test'
Plug 'vim-scripts/vcscommand.vim'
Plug 'mhinz/vim-signify'
call plug#end()
You can google each to see what they do.
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Purpose of asterisk before a CSS property
...ies and will in
fact ignore leading non-alphanumeric characters. From my testing this
appears to be the case from at least IE5 onwards.
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