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function htmlEscape(str) {
      return str.replace(/>/g,'&') 
		.replace(/</g,'&gt;')
		.replace(/"/g,'&lt;')
		.replace(/'/g,'&quot;')
		.replace(/`/g,'&#39;')
		.replace(/`/g,'&#96;');
}

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    function createStore(reducer) {
      // Store should have 4 parts.
      // 1. The state.
      // 2. Get the state.
      // 3. Listen to state change.
      // 4. Update the state.

      let state;
      let listeners = [];

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const isEmpty = value =>
        value === undefined ||
        value === null ||
        (typeof value === "object" && Object.keys(value).length === 0) ||
        (typeof value === "string" && value.trim().length === 0);

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    const f1 = h => h.title.toLowerCase().includes(title.toLowerCase());
    const f2 = d => d.field_category.toLowerCase().includes(category.toLowerCase());
    const f3 = e => e.uid.toLowerCase().includes(author.toLowerCase());

    const filtered = nodes.filter(f1).filter(f2).filter(f3);

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  function closestByClass(el, className) {
        while(!el.classList.contains(className)) {
            el = el.parentNode;
            if (!el) {
                return null;
            }
        }
        return el;
    }

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AWSTemplateFormatVersion: '2010-09-09'

Resources:
  CognitoUserPool:
    Type: "AWS::Cognito::UserPool"
    Description: "A Cognito user pool for authenticating users"
    Properties:
      UserPoolName: "NgAppUserPool"
      UsernameAttributes: [email, phone_number] # Allow both email or phone number to user can sign in / sign up
      Schema:

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  private restrictedWords(words) {
    return (control: FormControl): {[key: string]: any} => {
      if (!words ) { return null; }
      const invalidWords = words
        .map(word => control.value.includes(word) ? word : null)
        .filter(word => word != null);
      return invalidWords && invalidWords.length > 0
        ? { restrictedWords: invalidWords.join(', ')}
        : null;
    };