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 .populate([
        {path: 'user', select: 'first_name last_name profile_photo'}, 
        {path: 'commentId', populate: {path: 'commentBy', select: 'first_name last_name profile_photo'}}
      ])

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delete all project in heroku
for app in $(heroku apps); do heroku apps:destroy --app $app --confirm $app; done

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file permission to all files inside a directory
chmod -R <permissionsettings> <dirname>

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Build APK
react-native bundle --dev false --platform android --entry-file index.js --bundle-output ./android/app/build/intermediates/assets/debug/index.android.bundle --assets-dest ./android/app/build/intermediates/res/merged/debug
cd android/
./gradlew assembleDebug
gradlew permission
chmod 755 android/gradlew

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Delete local branch
git branch -d local_branch

Delete remote branch
git push origin --delete remote_branch

change git url
git remote set-url origin git://new.url.here

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 await stripe.tokens.create({
        card: {
          "number": '4242424242424242',
          "exp_month": 12,
          "exp_year": 2018,
          "cvc": '123'
        }
      }, function(err, token) {
        stripe.customers.create({
          email: 'sohag2847@gmail.com'

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v-validate="{ rules: { required: true, regex: /\b(0[1-9]|1[0-2])\/?([0-9]{4}|[0-9]{2})\b/} }" //inline regex
custom:
this.$validator.extend('emailexists', { // checks if the email is already in db
        getMessage: field => 'Your email is in our record.Please check your email to login',
        validate: async value => {
          let response = await fetch(`${process.env.baseUrl}/users/auth/searchbyquery?email=${value}`, {
            method: 'GET',
            headers: {'Content-Type': 'Application/json'}
          })
          let result = await response.json()

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//radius calculation

switch(radius_unit)
		{
			case "Meters":  { input_value = meters;				break;}
			case "KM": { input_value = meters/1000;			break;}
			case "Feet": { input_value = meters*3.28084;		break;}
			case "Miles": { input_value = meters*0.000621371;  break;}
			default :
			{

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//radius calculation

switch(radius_unit)
		{
			case "Meters":  { input_value = meters;				break;}
			case "KM": { input_value = meters/1000;			break;}
			case "Feet": { input_value = meters*3.28084;		break;}
			case "Miles": { input_value = meters*0.000621371;  break;}
			default :
			{

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modal
 v-bind:class="{ modal: true, 'is-active': processing }"