Tutorial by Examples: b

Above example helps us how to turn on SSH on Pi. This example is the prerequisite of above example. For Linux OS: Open the terminal and write down this ssh pi@your local IP address. Then you will need to provide the password. Note: Here pi: your raspberry pi username and your local IP address: th...

UPDATE wp_options SET option_value = replace(option_value, 'OLD_SITE, 'NEW_SITE') WHERE option_name = 'home' OR option_name = 'siteurl'; UPDATE wp_posts SET guid = replace(guid, 'OLD_SITE','NEW_SITE'); UPDATE wp_posts SET post_content = replace(post_content, 'OLD_SITE', 'NEW_SITE');

Imagine many users all running a web application that is trying to increment a counter in the database. Each user must read the current count, add one and write out the updated value. To make sure no one reads the counter while someone else is is adding one we use a transaction: ref.transaction(fun...

Publishers and subscribers don't need to know each other. They simply communicate with the help of message queues. (function () { var data; setTimeout(function () { data = 10; $(document).trigger("myCustomEvent"); }, 2000); ...

For a C-style function call, e.g. plus(a, b); // Parentheses surrounding only the arguments, comma separated Then the equivalent Haskell code will be (plus a b) -- Parentheses surrounding the function and the arguments, no commas In Haskell, parentheses are not explicitly required for functi...

In the previous example, we didn't end up needing the parentheses, because they did not affect the meaning of the statement. However, they are often necessary in more complex expression, like the one below. In C: plus(a, take(b, c)); In Haskell this becomes: (plus a (take b c)) -- or equivale...

DB backup Database backup is a must before starting any Dynamics CRM upgrade process. This is mandatory as to always have the option to rollback in case of any major roadblock. Wrong Estimation DO NOT underestimate the work involved in a CRM Upgrade process. Audit your current Microsoft Dynamics...

Now, here are some common pitfalls which might come along your way when upgrading your Dynamics CRM system. The organisation database selected for the import is a different version than the organisation database that is currently deployedCRM Organization Database To fix this issue, we need to in...

ScriptAnalyzer ships with sets of built-in preset rules that can be used to analyze scripts. These include: PSGallery, DSC and CodeFormatting. They can be executed as follows: PowerShell Gallery rules To execute the PowerShell Gallery rules use the following command: Invoke-ScriptAnalyzer -Path /...

To run the script analyzer against a single script file execute: Invoke-ScriptAnalyzer -Path myscript.ps1 This will analyze your script against every built-in rule. If your script is sufficiently large that could result in a lot of warnings and/or errors. To run the script analyzer against a w...

To see all the built-in rules execute: Get-ScriptAnalyzerRule

Following script enters predefined strings on hotkey presses if the scroll lock is active. This can be useful if you often paste a number of repeating strings. Included hotkey for script refresh (for example if you need to edit paste-able strings). ; refresh script hotkey Numpad9:: GetKeyS...

SET v_column_definition := CONCAT( v_column_name ,' ',v_column_type ,' ',v_column_options ); SET @stmt := CONCAT('ALTER TABLE ADD COLUMN ', v_column_definition); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt;

Object1 := nil; Object2 := nil; try Object1 := TMyObject.Create; Object2 := TMyObject.Create; finally Object1.Free; Object2.Free; end; If you do not initialize the objects with nil outside the try-finally block, if one of them fails to be created an AV will occur on the finally bl...

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...

To allow a bokeh application to be executed like a normal .py file, you need to handle the tornado IOloop in your application, as described here. A standalone bokeh application like this can be used to implement a console script entry point in setup.py. However, this requires bokeh version >= 0....

# ruby 1.92 lower_limit = 1 upper_limit = 6 Random.new.rand(lower_limit..upper_limit) # Change your range operator to suit your needs

(Beginner level; IDE: CLion) First, install boost from the Cygwin mirror: open the install exe, search for boost, install the packages. After boost is installed: it will be located in /usr/include/boost. This is where everything is. All #include statements will be a path from the boost folder,...

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Given the following class: public class FinalizableObject { public FinalizableObject() { Console.WriteLine("Instance initialized"); } ~FinalizableObject() { Console.WriteLine("Instance finalized"); } } A program that create...