Tutorial by Examples: er

JSON is a cross language, widely used method to serialize data Supported data types : int, float, boolean, string, list and dict. See -> JSON Wiki for more Here is an example demonstrating the basic usage of JSON :- import json families = (['John'], ['Mark', 'David', {'name': 'Avraham'}]) ...

Here is an example demonstrating the basic usage of pickle:- # Importing pickle try: import cPickle as pickle # Python 2 except ImportError: import pickle # Python 3 # Creating Pythonic object: class Family(object): def __init__(self, names): self.sons = names ...

Go in the Firebase console. Choose your project Click on the Database section on the left, and then select the Rules tab. If you would like to test your security rules before putting them into production, you can simulate operations in the console using the Simulate button in the upper right ...

You can define a private rules to disable read and write access to your database by users. With these rules, you can only access the database when you have administrative privileges (which you can get by accessing the database through the Firebase console or by signing in from a server). // These...

Here's an example of a rule that gives each authenticated user a personal node at /users/$user_id where $user_id is the ID of the user obtained through Authentication. // These rules grant access to a node matching the authenticated // user's ID from the Firebase auth token { "rules"...

An indeterminate ProgressBar shows a cyclic animation without an indication of progress. Basic indeterminate ProgressBar (spinning wheel) <ProgressBar android:id="@+id/progressBar" android:indeterminate="true" android:layout_width="wrap_content" ...

A determinate ProgressBar shows the current progress towards a specific maximum value. Horizontal determinate ProgressBar <ProgressBar android:id="@+id/progressBar" android:indeterminate="false" android:layout_width="match_parent" android:layout...

If you have one of the supported Linux distributions, you can follow the steps on the .NET Core website: https://www.microsoft.com/net If you have an unsupported distribution: Download the .NET Core SDK from the links, picking the distribution closer to the used one. https://www.microsoft.com/net...

With more and more battery optimizations being put into the Android system over time, the methods of the AlarmManager have also significantly changed (to allow for more lenient timing). However, for some applications it is still required to be as exact as possible on all Android versions. The follow...

You can create vibration patterns by passing in an array of longs, each of which represents a duration in milliseconds. The first number is start time delay. Each array entry then alternates between vibrate, sleep, vibrate, sleep, etc. The following example demonstrates this pattern: vibrate 100...

For one-time, non-constant requests for a user's physical activity, use the Snapshot API: // Remember to initialize your client as described in the Remarks section Awareness.SnapshotApi.getDetectedActivity(client) .setResultCallback(new ResultCallback<DetectedActivityResult>() { ...

// Remember to initialize your client as described in the Remarks section Awareness.SnapshotApi.getWeather(client) .setResultCallback(new ResultCallback<WeatherResult>() { @Override public void onResult(@NonNull WeatherResult weatherResult) { Weather weathe...

Thus these variables will use dynamic binding. (defparameter count 0) ;; All uses of count will refer to this one (defun handle-number (number) (incf count) (format t "~&~d~%" number)) (dotimes (count 4) ;; count is shadowed, but still special (handle-number coun...

#If Vba7 Then ' It's important to check for Win64 first, ' because Win32 will also return true when Win64 does. #If Win64 Then Declare PtrSafe Function GetFoo64 Lib "exampleLib32" () As LongLong #Else Declare PtrSafe Function GetFoo Lib "exampl...

You can use Bash Parameter Expansion to emulate common filename-processing operations like basename and dirname. We will use this as our example path: FILENAME="/tmp/example/myfile.txt" To emulate dirname and return the directory name of a file path: echo "${FILENAME%/*}" ...

Another use of RODBC is in connecting with SQL Server Management Database. We need to specify the 'Driver' i.e. SQL Server here, the database name "Atilla" and then use the sqlQuery to extract either the full table or a fraction of it. library(RODBC) cn <- odbcDriverConnect(connect...

### Definition proc myproc {alpha {beta {}} {gamma green}} { puts [list $alpha $beta $gamma] } ### Use myproc A # => A {} green myproc A B # => A B green myproc A B C # => A B C This procedure accepts one, two, or three arguments: those parameters whose names are the fi...

proc myproc args { ... } proc myproc {args} { ... } ;# equivalent If the special parameter name args is the last item in the argument list, it receives a list of all arguments at that point in the command line. If there are none, the list is empty. There can be arguments, including optional one...

proc myproc {varName alpha beta} { upvar 1 $varName var set var [expr {$var * $alpha + $beta}] } set foo 1 myproc foo 10 5 puts $foo # => 15 In this particular case, the procedure is given the name of a variable in the current scope. Inside a Tcl procedure, such variables aren't...

# application.rb config.time_zone = 'Eastern Time (US & Canada)'