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How should one use std::optional?

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Encrypting & Decrypting a String in C# [duplicate]

...ryptoStream.Close(); return Convert.ToBase64String(cipherTextBytes); } } } } } } public static string Decrypt(string cipherText, string passPhrase) ...
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What is the difference between map and flatMap and a good use case for each?

... values from those that return a Some: val rdd = sc.parallelize(Seq(1,2,3,4)) def myfn(x: Int): Option[Int] = if (x <= 2) Some(x * 10) else None rdd.flatMap(myfn).collect res3: Array[Int] = Array(10,20) (noting here that an Option behaves rather like a list that has either one element, ...
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What is a bus error?

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Java SimpleDateFormat(“yyyy-MM-dd'T'HH:mm:ss'Z'”) gives timezone as IST

...:26 AZ_ 34.4k2828 gold badges150150 silver badges197197 bronze badges answered Oct 1 '13 at 11:41 Peter Lawrey...
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Traits vs. interfaces

... 240 An interface defines a set of methods that the implementing class must implement. When a trait...
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How can I store my users' passwords safely?

...defeat the entire purpose of the pepper). $config['pepper'] = hex2bin('012345679ABCDEF012345679ABCDEF012345679ABCDEF012345679ABCDEF'); $hasher = new PepperedPasswords($config['pepper']); // $hash is what you would store in your database $hash = $hasher->hash($_POST['password']); // $hash would...
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How do I get textual contents from BLOB in Oracle SQL

... 144 First of all, you may want to store text in CLOB/NCLOB columns instead of BLOB, which is design...
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iOS 7 TableView like in Settings App on iPad

...View.backgroundColor = .clear cell.backgroundView = testView } Swift 4.2 override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) { if (cell.responds(to: #selector(getter: UIView.tintColor))){ if tableView == self.tableVi...
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Can an enum class be converted to the underlying type?

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