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In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros? [dupli
...oach would be to check how many digits are output by Integer.toHexString() and add a leading zero to each byte if needed. Something like this:
public static String toHexString(byte[] bytes) {
StringBuilder hexString = new StringBuilder();
for (int i = 0; i < bytes.length; i++) {
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What is base 64 encoding used for?
I've heard people talking about "base 64 encoding" here and there. What is it used for?
18 Answers
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How can I get the MAC and the IP address of a connected client in PHP?
I need to know the MAC and the IP address of the connect clients, how can I do this in PHP?
16 Answers
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Create a CSV File for a user in PHP
...re important. To ensure good display, put doublequotes around your fields, and don't forget to replace double-quotes inside fields to double double-quotes: `echo '"'.str_replace('"','""',$record1).'","'.str_replace....
– Mala
Jul 1 '10 at 21:21
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glob exclude pattern
...t sets, but this kind of operation only works on sets, hence why neutrinus cast it. If you need it to remain a list, simply wrap the entire operation in a cast: list(set(glob("*")) - set(glob("eph")))
– Nathan Smith
Aug 10 '17 at 21:48
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Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
...troller()"? Is var not same as JavaScript/C# (if no, then so sad)? Is this casting, but object types are same on both sides of equal sign?
– Tien Do
Jun 6 '14 at 4:29
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...S加密/解密，RSA加密/解密，BASE64编码/解码
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Hash function that produces short hashes?
Is there a way of encryption that can take a string of any length and produce a sub-10-character hash? I want to produce reasonably unique ID's but based on message contents, rather than randomly.
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Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...your array will never contain more than 2^31-1 elements!),
add an explicit cast:
int count = (int)[myColors count];
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How can I safely encode a string in Java to use as a filename?
...ng from an external process. I want to use that String to make a filename, and then write to that file. Here's my code snippet to do this:
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