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    Use git log --diff-filter=D --summary to get all the commits which have deleted files and the files deleted;
    Use git checkout $commit~1 filename to restore the deleted file.

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psql -d template1 -c 'create extension hstore;'

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coverage run --source='app_name' manage.py test app_name
coverage report -m

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git config core.fileMode false

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youtube-dl --list-formats URL
youtube-dl --format URL

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<ul>
  <li ng-repeat="(key, errors) in form.$error track by $index"> <strong>{{ key }}</strong> errors
    <ul>
      <li ng-repeat="e in errors">{{ e.$name }} has an error: <strong>{{ key }}</strong>.</li>
    </ul>
  </li>
</ul>

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def save_image(file_name, new_file_name, directory):
    """
    :param file_name(string) old name of image
    :param new_file_name(string) new name of image
    :param directory(string) name of directory from which image has been fetched
    helps to create images
    """
    tags_list = ['vd-images']
    applicable_languages_list = ['en']
    # over here import the django model specific to images

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shopt -s extglob
rm !(X|Y)

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$(document).ready(function() {
    function jQuerySubmit(type, url, data, contentType, dataType, handler) {
        $.ajax({
            type: type,
            url: url,
            data: data,
            contentType: contentType
            dataType: dataType,
            success: handler
        });

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function parseDuration(PT) {
  var output = [];
  var durationInSec = 0;
  var matches = PT.match(/P(?:(\d*)Y)?(?:(\d*)M)?(?:(\d*)W)?(?:(\d*)D)?T(?:(\d*)H)?(?:(\d*)M)?(?:(\d*)S)?/i);
  var parts = [
    { // years
      pos: 1,
      multiplier: 86400 * 365
    },
    { // months