janzikan

/**
 * Resize image - preserve ratio of width and height.
 * @param string $sourceImage path to source JPEG image
 * @param string $targetImage path to final JPEG image file
 * @param int $maxWidth maximum width of final image (value 0 - width is optional)
 * @param int $maxHeight maximum height of final image (value 0 - height is optional)
 * @param int $quality quality of final image (0-100)
 * @return bool
 */
function resizeImage($sourceImage, $targetImage, $maxWidth, $maxHeight, $quality = 80)

andelf

package main

import (

  "log"
	"net/mail"
	"encoding/base64"
	"net/smtp"
	"fmt"
	"strings"

krusynth

<?php
/*
 * Translate a non-standard object into an associative array object.
 * Super-useful for dealing with simplexml objects.
 */
function simpleXML_to_object($obj)
{
  $data = new StdClass();
    if(
		(is_object($obj) && get_class($obj) == 'SimpleXMLElement')

sergiotapia

import (
    "crypto/md5"
    "encoding/hex"
)

func GetMD5Hash(text string) string {
    hasher := md5.New()
    hasher.Write([]byte(text))
    return hex.EncodeToString(hasher.Sum(nil))
}

turret-io

<?php
// DEFINE our cipher
define('AES_256_CBC', 'aes-256-cbc');

// Generate a 256-bit encryption key
// This should be stored somewhere instead of recreating it each time
$encryption_key = openssl_random_pseudo_bytes(32);

// Generate an initialization vector
// This *MUST* be available for decryption as well

castorflex

public class ASCIIFolding {

    @NonNull
    public static String foldToASCII(@NonNull String input) {
        return foldToASCII(input, new StringBuilder(input.length()));
    }

    @NonNull
    public static String foldToASCII(@NonNull String input, @NonNull StringBuilder sb) {
        final int end = input.length();

jim3ma

package main

import (
    "fmt"
    "log"
    "net"
    "net/mail"
    "net/smtp"
    "crypto/tls"
)

dixudx

import "bytes"

func StreamToByte(stream io.Reader) []byte {
  buf := new(bytes.Buffer)
	buf.ReadFrom(stream)
	return buf.Bytes()
}

func StreamToString(stream io.Reader) string {
	buf := new(bytes.Buffer)

nikhita

How to update the Go version

System: Debian/Ubuntu/Fedora. Might work for others as well.

1. Uninstall the exisiting version

As mentioned here, to update a go version you will first need to uninstall the original version.

To uninstall, delete the /usr/local/go directory by:

dyerrington

Overfitting in decision trees

Overfitting can be one problem that describes if your model no longer generalizes well.

Overfitting happens when any learning processing overly optimizes training set error at the cost test error. While it’s possible for training and testing to perform equality well in cross validation, it could be as the result of the data being very close in characteristics, which may not be a huge problem. In the case of decision tree’s they can learn a training set to a point of high granularity that makes them easily overfit. Allowing a decision tree to split to a granular degree, is the behavior of this model that makes it prone to learning every point extremely well — to the point of perfect classification — ie: overfitting.

I recommend the following steps to avoid overfitting:

• Use a test set that is not exactly like the training set, or different enough that error rates are going to be easy to see.