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How many String objects will be created when using a plus sign?

...raised: what about this? string s = M() + null; We cannot optimize that down to string s = M(); because M() might return null, but String.Concat(M(), null) would return an empty string if M() returns null. So what we do is instead reduce string s = M() + null; to string s = M() ?? ""; ...
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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

...items, like in this code tracking upvodes: var upvotesRef = new Firebase('https://docs-examples.firebaseio.com/android/saving-data/fireblog/posts/-JRHTHaIs-jNPLXOQivY/upvotes'); upvotesRef.transaction(function (current_value) { return (current_value || 0) + 1; }); For more info, see https://www...
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Unable to authenticate with Git Bash to Visual Studio Team Services

...6-21, the page to enable alternate authentication settings is at the link https://*YOUR_USER_NAME*.visualstudio.com/_details/security/altcreds. share | improve this answer | ...
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Concurrent.futures vs Multiprocessing in Python 3

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Can I force a page break in HTML printing?

...ys; } } (tested and working on Chrome 69 and Firefox 62). Reference: https://www.w3schools.com/cssref/pr_print_pageba.asp https://developer.mozilla.org/en-US/docs/Web/CSS/page-break-after ; important note: here it's said This property has been replaced by the break-after property. but it didn'...
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Find first element in a sequence that matches a predicate

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How to get equal width of input and select fields

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How to find foreign key dependencies in SQL Server?

...le, you can use this: EXEC sp_fkeys 'TableName' I found it on SO here: https://stackoverflow.com/a/12956348/652519 I found the information I needed pretty quickly. It lists the foreign key's table, column and name. EDIT Here's a link to the documentation that details the different parameters ...
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What is the difference between Caching and Memoization?

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Grepping a huge file (80GB) any way to speed it up?

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