Short source code examples

How to create a Toast message in Android:

Toast.makeText(this, "No forecast available", 2500).show();

A PHP function that reduces multiple consecutive spaces in a string to one single space, so something like "   " is reduced to " ".

function reduceMultipleSpacesToSingleSpace($text) {
  return preg_replace('/\s+/', " ", $text );
}

A PHP function that strips a string of all characters other than alphanumeric characters:

function onlyAlphanumericAndSpaces($text) {
  # allow only alphanumeric
  return ereg_replace("[^A-Za-z0-9 ]", "", $text );
}
/**
 * Implementation of hook_form_alter().
 * Use these functions to alter the "charity" forms.
 */
function user_validator_form_charity_node_form_alter(&$form, &$form_state) {

  $form['bookverify'] = array(
      '#type' => 'fieldset',
      '#title' => t('Confirmation'),
      '#weight' => 20
    );
  $form['bookverify']['words'] = array(
      '#type' => 'textfield',
      '#title' => t('First five words from Lesson 12'),
      '#descripti