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What is the use of ByteBuffer in Java? [closed]
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This is a good description of its uses and shortcomings. You essentially use it whenever you need to do fast low-level I/O. If you were going to implement a TCP/IP protocol or if you were writing a database (DBMS) this class would come in handy.
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List comprehension in Ruby
To do the equivalent of Python list comprehensions, I'm doing the following:
17 Answers
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How to distinguish mouse “click” and “drag”
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How to check if a file exists in the Documents directory in Swift?
...ue)[0] as String
let url = NSURL(fileURLWithPath: path)
if let pathComponent = url.appendingPathComponent("nameOfFileHere") {
let filePath = pathComponent.path
let fileManager = FileManager.default
if fileManager.fileExists(atPath: filePath) {
print("FILE ...
Can I obtain method parameter name using Java reflection?
...etting parameter names is possible if debug information is included during compilation. See this answer for more details
otherwise getting parameter names is not possible
getting parameter type is possible, using method.getParameterTypes()
For the sake of writing autocomplete functionality for an ...
Calculate a MD5 hash from a string
...System.Text.Encoding.ASCII.GetBytes(input);
byte[] hashBytes = md5.ComputeHash(inputBytes);
// Convert the byte array to hexadecimal string
StringBuilder sb = new StringBuilder();
for (int i = 0; i < hashBytes.Length; i++)
{
sb.Append(hashBytes...
Does Java casting introduce overhead? Why?
Is there any overhead when we cast objects of one type to another? Or the compiler just resolves everything and there is no cost at run time?
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Unable to cast object of type 'System.DBNull' to type 'System.String`
...numeric values, false for boolean, MinValue for DateTime... msdn.microsoft.com/en-us/library/vstudio/…
– Jaime
Oct 7 '14 at 14:30
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How do I add indices to MySQL tables?
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ALTER TABLE `table` ADD INDEX `product_id_index` (`product_id`)
Never compare integer to strings in MySQL. If id is int, remove the quotes.
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