Tutorial by Examples: b

Border-Based Buttons

This technique relies on adding thick borders to the link itself to build the button's CTA. Using borders is universally understood by email clients, but limit button appearance solid colors. <table width="100%" border="0" cellspacing="0" cellpadding="0"&g...

Padding + Border-Based Buttons

This technique uses a combination of border-based and padding-based buttons, styling the link with both padding and at least a solid 1px border. The background color needs to be applied to the instead of the in this instance because Outlook does recognize horizontal padding on the tag (since it's...

Bullet-proof button with spacers

This button derives from this example by Email on Acid. It is entirely code-based, so it will display without images downloaded, and the entire button is hoverable + clickable. Additionally, this example also includes spacers to help control how much vertical space appears before and after the butt...

Canny Edge Video from Webcam Capture - Python

import cv2 def canny_webcam(): "Live capture frames from webcam and show the canny edge image of the captured frames." cap = cv2.VideoCapture(0) while True: ret, frame = cap.read() # ret gets a boolean value. True if reading is successful (I think). frame ...

COMMENT on Table

COMMENT ON TABLE table_name IS 'this is student details table';

typedef enum declaration in Objective-C

A enum declares a set of ordered values - the typedef just adds a handy name to this. The 1st element is 0 etc. typedef enum { Monday=1, Tuesday, Wednesday } WORKDAYS; WORKDAYS today = Monday;//value 1

VectorDrawable Usage Example

Here’s an example vector asset which we’re actually using in AppCompat: res/drawable/ic_search.xml <vector xmlns:android="..." android:width="24dp" android:height="24dp" android:viewportWidth="24.0" android:viewportHeig...

VectorDrawable xml example

Here is a simple VectorDrawable in this vectordrawable.xml file. <vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="64dp" android:width="64dp" android:viewportHeight="600" android:viewportWidth=&quot...

unique and duplicated no longer works on keyed data.table

This is for those moving to data.table >= 1.9.8 You have a data set of pet owners and names, but you suspect some repeated data has been captured. library(data.table) DT <- data.table(pet = c("dog","dog","cat","dog"), owner = c(&quot...

SQL Server 2012/2014 using ORDER BY OFFSET and FETCH NEXT

For getting the next 10 rows just run this query: SELECT * FROM TableName ORDER BY id OFFSET 10 ROWS FETCH NEXT 10 ROWS ONLY; Key points to consider when using it: ORDER BY is mandatory to use OFFSET and FETCH clause. OFFSET clause is mandatory with FETCH. You can never use, ORDER BY … FETC...

How you create a tri-color attributed string.

NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:@"firstsecondthird"]; [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0,5)]; [string addAttribute:NSForegroundColorAttributeName value:[UIColor greenColo...

Create a view with schema binding

If a view is created WITH SCHEMABINDING, the underlying table(s) can't be dropped or modified in such a way that they would break the view. For example, a table column referenced in a view can't be removed. CREATE VIEW dbo.PersonsView WITH SCHEMABINDING AS SELECT name, address FROM d...

Send to the Browser

//create a new ExcelPackage using (ExcelPackage excelPackage = new ExcelPackage()) { //create the WorkSheet ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets.Add("Sheet 1"); //add some text to cell A1 worksheet.Cells["A1"].Value = "My second...

How to setup a nested form in Ruby on Rails

The first to thing to have: a model that contains a has_many relation with another model. class Project < ApplicationRecord has_many :todos end class Todo < ApplicationRecord belongs_to :project end In ProjectsController: class ProjectsController < ApplicationController d...

Blocking on async code can cause deadlocks

It is a bad practice to block on async calls as it can cause deadlocks in environments that have a synchronization context. The best practice is to use async/await "all the way down." For example, the following Windows Forms code causes a deadlock: private async Task<bool> TryThis()...

JSP out implicit object - simply displaying date and time.

<html> <body> <% out.print("Today is:"+java.util.Calendar.getInstance().getTime()); %> </body> </html>

Download an header chain with bitcore-p2p

IMPORTANT This is just an example code, do not use in production. In order to download an header chain we have to send a getHeaders message. In this example we will require as much as possible headers after the 40000th one.The peer will respond with batch of 2000 headers so, we have to take the la...

Decompile Database

This should always be your initial fix. A good policy is to decompile the database before each release. Create a decompile shortcut. This loads the database with a "/decompile" switch. Right Click your Database File. Select Copy Right Click in the explorer window and select &quot...

Remove Binary Data from Form

Sometimes the crashes occur constantly in a single form or report, or occur only when printing. It is possible that the binary data within the form / report has become corrupt. Save the Form / Report object as text There are two undocumented functions. Application.SaveAsText and Application.Load...

Remove "OLE Object" fields

If you have images or other data stored in Access itself as OLE Objects, then you should find a better approach. When the OLE data is stored, it is stored according to the software (and version of software) on the computer storing it. When another computer goes to display that OLE Object data on the...

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