Tutorial by Examples: id

Let's take the Range is from 18 to 80. So, to validate, We should check that the age is a positive integer. Then check it should be greater than or equal to 18 and less than or equal to 80. The test to check whether it is a number or not can be performed by a simple regular expression like ^[0-...

Sometimes, we have to take input from users which should contain only alpha numeric characters. For example, lets say a Username system which allow only letters and numbers, Then this can be done with the following Regular Expression ^[a-zA-Z0-9]+$ ^ is restrict the start [a-zA-Z0-9]+ is th...

Data can be extracted from a blastdb using blastdbcmd which should be included in a blast installation. You can specify from the options below as part of -outfmt what metadata to include and in what order. From the man page: -outfmt <String> Output format, where the available format sp...

The grid() geometry manager organises widgets in a table-like structure in the parent widget. The master widget is split into rows and columns, and each part of the table can hold a widget. It uses column, columnspan, ipadx, ipady, padx, pady, row, rowspan and sticky. Syntax widget.grid(options) ...

Let's say you use Webpack for front end bundling. You can add webpack-dev-middleware to serve your statics through tiny and fast server. It allows you to automatically reload your assets when content has changed, serve statics in memory without continuously writing intermediate versions on disk. Pr...

This example helper class interacts with the finger print manager and performs encryption and decryption of password. Please note that the method used for encryption in this example is AES. This is not the only way to encrypt and other examples exist. In this example the data is encrypted and decryp...

# Roll a 6 sided die, rand(6) returns a number from 0 to 5 inclusive dice_roll_result = 1 + rand(6)

Bridge Mode $ docker run –d –-name my_app -p 10000:80 image_name Note that we did not have to specify --net=bridge because this is the default working mode for docker. This allows to run multiple containers to run on same host without any assignment of dynamic port. So BRIDGE mode avoids the por...

For this example, let model be a Keras model for classifying video inputs, let X be a large data set of video inputs, with a shape of (samples, frames, channels, rows, columns), and let Y be the corresponding data set of one-hot encoded labels, with a shape of (samples, classes). Both datasets are s...

For this example, let's assume that the inputs have a dimensionality of (frames, channels, rows, columns), and the outputs have a dimensionality of (classes). from keras.applications.vgg16 import VGG16 from keras.models import Model from keras.layers import Dense, Input from keras.layers.pooling...

Liquid code can be categorised into objects, tags and filters. Objects Objects tell Liquid where to show content on a page. Objects and variables are denoted with double curly braces. {{ and }} <!-- input --> {{ page.title }} <!-- output --> Getting started with Liquid Tags T...

MultiDex is a library in the Android APK that allows the app to have more than 65,536 methods. The Android APKs have Dalvik Executable files (.dex) that contain the generated bytecodes compiled from your Java code. Each .dex file can contain up to 65,536 methods (2^16). Android OS versions before ...

A generic new() constructor that takes the string name of the desired algorithm as its first parameter also exists to allow access to the above listed hashes as well as any other algorithms that your OpenSSL library may offer. The named constructors are much faster than new() and should be preferred...

Unquoted identifiers can use letters (a-z), digits (0-9), and underscore (_), and must start with a letter. Depending on SQL implementation, and/or database settings, other characters may be allowed, some even as the first character, e.g. MS SQL: @, $, #, and other Unicode letters (source) MySQ...

ProGuard is a tool used in the building process to optimize and obfuscate the Java code of your APK, and also remove unused classes. The resulting APK when using ProGuard will have a smaller size and will be harder to reverse-engineer (decompilation). ProGuard can be used too in Xamarin.Android app...

Here is a list of actions which can be triggered in the Midnight Commander filesystem browsing mode by using function keys on your keyboard. F1 Displays help F2 Opens user menu F3 Displays the contents of the selected file F4 Opens the selected file in the internal file editor F5 Copies th...

Midnight Commander has a built in editor which is started by F4 function key when over the desired file in the browse mode. It can also be invoked in standalone mode by executing mcedit <filename> Here is a list of actions which can be triggered in the edit mode. F1 Displays help F2 Saves ...

CentOS versions 2 - 5 CentOS version 7 CentOS 7 is fully based on RedHat the detail documentation, examples and system administration guides are located here:CentOS 7 full documention

There are a variety of ways to validate parameter entry, in PowerShell. Instead of writing code within functions or scripts to validate parameter values, these ParameterAttributes will throw if invalid values are passed. ValidateSet Sometimes we need to restrict the possible values that a paramet...

When using the .get() method whatever is in the entry widget will be converted into a string. For example, regardless of the type of input(It can be a number or sentence), the resulting outcome will be a string. If the user types 4 the output will be "4" as in a string. To get an int from ...