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How can I hash a password in Java?
...spec).getEncoded();
Base64.Encoder enc = Base64.getEncoder();
System.out.printf("salt: %s%n", enc.encodeToString(salt));
System.out.printf("hash: %s%n", enc.encodeToString(hash));
Here's a utility class that you can use for PBKDF2 password authentication:
import java.security.NoSuchAlgorithmExcep...
How do I remove an item from a stl vector with a certain value?
...e extra elements that are now at the end of the container:
std::vector<int> vec;
// .. put in some values ..
int int_to_remove = n;
vec.erase(std::remove(vec.begin(), vec.end(), int_to_remove), vec.end());
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Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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Printing the correct number of decimal points with cout
I have a list of float values and I want to print them with cout with 2 decimal places.
12 Answers
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How can I force Powershell to return an array when a call only returns one object?
...rray to an Azure deployment template. If there was one object, PowerShell "converted" it to a string. In the example below, $a is returned from a function that gets VM objected according to the value of a tag. I pass the $a to the New-AzureRmResourceGroupDeployment cmdlet by wrapping it in @(). Like...
How do I assign an alias to a function name in C++?
...ew name to a function? For example, I want to use the name holler for printf . #define is obvious... any other way?
8 An...
Better naming in Tuple classes than “Item1”, “Item2”
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The syntax is List<(int first, int second)>. I had to download the System.ValueTuple package from NuGet to get it to work in Visual Studio 2017.
– Matt Davis
Mar 25 '17 at 23:19
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What does “while True” mean in Python?
...the while statement is going to be evaluated as a boolean. Meaning it gets converted into either true or false.
Consider in the statement while(6 > 5)
It first evaluates the expression 6 > 5 which is true so is the same as saying while(true)
Anything that is not FALSE, 0, an emptry string ...
SQL query to select dates between two dates
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Tried this today, you could also use convert(date, Date) between '2011/02/25' and '2011/02/27' (at least with a recent MS SQL Server). The convert() part will take care of stripping the time part and the between comparison will then work as expected.
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C# 'is' operator performance
...ed to test the type of an object to see whether it inherits from a certain interface.
8 Answers
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