Tutorial by Examples: dc

This method allows a command to be sent to Cmd.exe, and returns the standard output (including standard error) as a string: private static string SendCommand(string command) { var cmdOut = string.Empty; var startInfo = new ProcessStartInfo("cmd", command) { ...

Given a Day, we can perform simple arithmetic and comparisons, such as adding: import Data.Time addDays 1 (fromGregorian 2000 1 1) -- 2000-01-02 addDays 1 (fromGregorian 2000 12 31) -- 2001-01-01 Subtract: addDays (-1) (fromGregorian 2000 1 1) -- 1999-12-31 addDays (-1) (fromGregorian...

You can do a permissions check when sending an Intent to a registered broadcast receiver. The permissions you send are cross-checked with the ones registered under the tag. They restrict who can send broadcasts to the associated receiver. To send a broadcast request with permissions, specify the p...

// [x0,y0] to [x1,y1] define a line segment // [cx,cy] is circle centerpoint, cr is circle radius function isCircleSegmentColliding(x0,y0,x1,y1,cx,cy,cr){ // calc delta distance: source point to line start var dx=cx-x0; var dy=cy-y0; // calc delta distance: line start to e...

Tests all polygon sides for intersections to determine if 2 polygons are colliding. // polygon objects are an array of vertices forming the polygon // var polygon1=[{x:100,y:100},{x:150,y:150},{x:50,y:150},...]; // The polygons can be both concave and convex // return true if the 2 polygons ...

You can expose values from JSON column as computed columns: CREATE TABLE ProductCollection ( Id int identity primary key, Data nvarchar(max), Price AS JSON_VALUE(Data, '$.Price'), Color JSON_VALUE(Data, '$.Color') PERSISTED ) If you add PERSISTED computed column, value from JSON tex...

In SQL Server, there are two categories of triggers: DDL Triggers and DML Triggers. DDL Triggers are fired in response to Data Definition Language (DDL) events. These events primarily correspond to Transact-SQL statements that start with the keywords CREATE, ALTER and DROP. DML Triggers are fired ...

In this example you will learn how to generate RSA-OAEP key pair and how to convert private key from this key pair to base64 so you can use it with OpenSSL etc. Please note that this process can also be used for public key you just have to use prefix and suffix below: -----BEGIN PUBLIC KEY----- --...

Apply the transformation to non-collection entries, delving into nested collections too and preserving the whole structure. def lst = ['foo', 'bar', ['inner_foo', 'inner_bar']] lst.collectNested { it.toUpperCase() } // [FOO, BAR, [INNER_FOO, INNER_BAR]]

This is relevant for apps that implement a BootListener. Test your app by killing your app and then test with: adb shell am broadcast -a android.intent.action.BOOT_COMPLETED -c android.intent.category.HOME -n your.app/your.app.BootListener (replace your.package/your.app.BootListener with proper ...

Sometimes it may be useful to have a specific asBoolean definition in your own program for some kind of objects. /** an oversimplified robot controller */ class RunController { def complexCondition int position = 0 def asBoolean() { return complexCondition(this...

Darken #demo { @refcolor: #f0b9b8; background: @refcolor; border: 1px solid darken(@refcolor, 25%); } The above code makes use of the darken() function to set the border color as a shade that is 25% darker than the reference color (which is also the background color). Less compiler ca...

IRandomAccessStreamReference bitmap = GetBitmap(); IRandomAccessStreamWithContentType stream = await bitmap.OpenReadAsync(); BitmapDecoder decoder = await BitmapDecoder.CreateAsync(stream); var pixels = await decoder.GetPixelDataAsync(); var outStream = new InMemoryRandomAccessStream(); // Cr...

A BroadcastReceiver is basically a mechanism to relay Intents through the OS to perform specific actions. A classic definition being "A Broadcast receiver is an Android component which allows you to register for system or application events." LocalBroadcastManager is a way to send ...

You can communicate two activities so that Activity A can be notified of an event happening in Activity B. Activity A final String eventName = "your.package.goes.here.EVENT"; @Override protected void onCreate(Bundle savedInstanceState) { registerEventReceiver(); super.onCre...

Input file Mary had a little lamb its fleece was white as snow and everywhere that Mary went the lamb was sure to go. Pig Word Count Code -- Load input from the file named Mary, and call the single -- field in the record 'line'. input = load 'mary' as (line); -- TOKENIZE splits the line...

$ mysqlimport --fields-optionally-enclosed-by='"' --fields-terminated-by=, --lines-terminated-by="\r\n" mycompany employee.csv

In the Adobe technical white paper Adobe Acrobat 9 Digital Signatures, Changes and Improvements, especially its section "Allowed and disallowed changes", Adobe clarifies the allowed changes (as seen by Acrobat 9 and up) that can be made to a certified or signed document without invalidatin...

The following code is taken from he official AutoHotkey documentation: Function implementation: #Persistent OnClipboardChange("ClipChanged") return ClipChanged(Type) { ToolTip Clipboard data type: %Type% Sleep 1000 ToolTip ; Turn off the tip. } Label implementati...

RxSwift provides not only the ways to control your data, but to represent user actions in a reactive way also. RxCocoa contains everything you need. It wraps most of the UI components' properties into Observables, but not really. There are some upgraded Observables called ControlEvents (which repre...