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When to use .First and when to use .FirstOrDefault with LINQ?

....FirstOrDefault will return null for reference types. I was confused about what a "default" object would be. This answer cleared that up. – Mike Taverne Oct 4 '18 at 17:39 add...
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In Firebase, is there a way to get the number of children of a node without loading all the node dat

.... Haven't had time to look into it myself, so will wait a few days to see what people think... – josh Jan 26 '16 at 19:08 1 ...
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Git keeps prompting me for a password

... 'no'. The default is 'no'. Apple has added Technote 2449 which explains what happened. Prior to macOS Sierra, ssh would present a dialog asking for your passphrase and would offer the option to store it into the keychain. This UI was deprecated some time ago and has been removed. ...
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How do I programmatically shut down an instance of ExpressJS for testing?

... Perfect, exactly what I was looking for. I guess I didn't find it in Express because they were extending the core node http server, which I didn't totally understand. Thanks! – drewww Dec 28 '11 at 19:59...
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How to stretch the background image to fill a div

... I don't know what you're trying to do with your background img but background-size: cover; background-position: center will fill the background of the div without stretching the image – Ouadie Nov 24...
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Bootstrap: align input with button

... Fantastic! Exactly what I needed for a troublesome form! – its_notjack Jun 7 '15 at 11:15 ...
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Can I use a :before or :after pseudo-element on an input field?

...e 'content' property, in conjunction with these pseudo-elements, specifies what is inserted. See? an element's document tree content. As I understand it this means within a container. share | imp...
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Java enum - why use toString instead of name

... It really depends on what you want to do with the returned value: If you need to get the exact name used to declare the enum constant, you should use name() as toString may have been overriden If you want to print the enum constant in a user fr...
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How can I prevent the scrollbar overlaying content in IE10?

...onsive-design/ @-ms-viewport { width: device-width; } This snippet is what's causing the behavior. I recommend reading the links listed in the commented code above. (They were added after I initially posted this answer.) ...
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How do I edit an incorrect commit message in git ( that I've pushed )?

... complete, you could rewrite your local commit history in order to reflect what you want, as suggested by sykora (with some rebase and reset --hard, gasp!) However, once you publish your revised history again (with a git push origin +master:master, the + sign forcing the push to occur, even if it d...