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Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
...rigin to *, but it appears that recent versions of Chrome are requiring an extra header. Try prepending the following to your file if you are using PHP:
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
Make sure tha...
CPU Privilege Rings: Why rings 1 and 2 aren't used?
...(depending on the hyper-visor) not 1 as I previously stated.
However, the extra two rings never really helped and thus became rarely used. TBH, most code using rings 1 and 2 these have semi-repurposed them from their original use (such as the hypervisors). Most windows code these days seems to trea...
Git - How to use .netrc file on Windows to save user and password
...to 'C:\Users\"username"'.
Go that that folder (cd %HOME%) and make a file called '_netrc'
Note: Again, for Windows, you need a '_netrc' file, not a '.netrc' file.
Its content is quite standard (Replace the <examples> with your values):
machine <hostname1>
login <login1>
password...
Can unit testing be successfully added into an existing production project? If so, how and is it wor
...lexity. No, tests don't write themselves, and, yes, it will take a little extra time to get things out the door. But in the long run it will take more time and cost more money to fix bugs after the fact than write tests up front. Period. That's all there is to it.
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What is the difference between attribute and property? [closed]
...roperties.
To further confuse things, changes to the properties will typically update the attributes.
For example, changing the element.href property will update the href attribute on the element, and that'll be reflected in a call to element.getAttribute('href').
However if you subsequently read...
Apply .gitignore on an existing repository already tracking large number of files
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This answer solved my problem:
First of all, commit all pending changes.
Then run this command:
git rm -r --cached .
This removes everything from the index, then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"
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Singleton by Jon Skeet clarification
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Extra points for attempting an answer about a Jon Skeet question in which Jon Skeet has already answered.
– valdetero
May 11 '15 at 19:05
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A monad is just a monoid in the category of endofunctors, what's the problem?
...gt; Anything including Anything else. As my imagination jumps to Int -> String, it also includes Integer -> Maybe Int, or even Maybe Double -> Either String Int where a :: Maybe Double; b :: Either String Int.
So the statement comes together as follows:
functor scope :: f a -> g b ...
Using global variables between files?
...e project, with around 50 files, and I need to define global variables for all those files.
6 Answers
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MySQL > Table doesn't exist. But it does (or it should)
I changed the datadir of a MySQL installation and all the bases moved correctly except for one.
I can connect and USE the database. SHOW TABLES also returns me all the tables correctly, and the files of each table exists on the MySQL data directory.
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