Tutorial by Examples: d

A settings variable Default_Base is set on the instance of Ada.Text_IO.Integer_IO; also, Default_Width is set so that output cannot have leading space. with Ada.Text_IO; use Ada.Text_IO; procedure Print_Hex is subtype Count is Integer range -1_000_000 .. 1_000_000; package Count_IO...

Ada.Text_IO.Editing offers formatting decimal fixed point values using “picture strings”. These describe output using “magical” characters for separators, currency signs, etc. with Ada.Text_IO.Editing; use Ada.Text_IO; procedure Print_Value is Max_Count : constant := 1_000_000; ...

A simple sports2000 example: FIND FIRST Customer NO-LOCK WHERE CustNum = 1 NO-ERROR. IF AVAILABLE Customer THEN DO: DISPLAY Customer.NAME. END. ELSE DO: MESSAGE "No record available". END. FIRST - find the first record that matches the query NO-LOCK - don't lock the r...

Paste this snippet somewhere in the http {} Block; or place it in it's own file in the /etc/nginx/conf.d/ folder. Also see the official docs for logging to syslog. # # Access Log # log_format fmt_syslog '[$time_local] $status $remote_addr $http_host "$request" $body_bytes_sent $reque...

A usual Website just needs 3 HTTP Methods: GET, HEAD and POST. Block all other Methods by using limit_except: location / { [...] # Note: GET includes HEAD limit_except GET POST { deny all; } [...] }

Coding method used: Hybrid/Spongy It has been forever a myth that div's can not be used in emails. There are email clients (unlike outlook) that can render div's properly. The example below will illustrate how an email can be coded that will work on Gmail app (with updates not rolled out yet), Sams...

To include an icon font in your CSS, you can include the following code : @font-face { font-family: 'myfont'; src:url('fonts/myfont.eot?-td2xif'); src:url('fonts/myfont.eot?#iefix-td2xif') format('embedded-opentype'), url('fonts/myfont.woff?-td2xif') format('woff'), ...

Consider a down-pointing triangle. There are several correct ways to display this symbol on a web page. Method 1 : use decimal HTML entity HTML : ▼ Method 2 : use hexidecimal HTML entity HTML : ▼ Method 3 : use character directly HTML : ▼ Method 4 : use CS...

To include a webfont in your CSS, you can include the following code: @font-face { font-family: 'myfont'; src:url('fonts/myfont.eot?-td2xif'); src:url('fonts/myfont.eot?#iefix-td2xif') format('embedded-opentype'), url('fonts/myfont.woff?-td2xif') format('woff'), url...

Overall you have two ways to monitor processes at linux host Static monitoring Most widely used command is ps (i.e., process status) command is used to provide information about the currently running processes, including their process identification numbers (PIDs). Here few useful options to gath...

To get general statistics about main components of Linux family of stat commands are extremely useful CPU To get processors related statistics you can use mpstat command but with some options it will provide better visibility: $ mpstat 2 10 Memory We all know command free to show amount of (r...

One can describe a line in arbitrary dimensions as X = A + t*D where A and D are both vectors of suitably many dimensions. So in 2d this would be x = Ax + t*Dx y = Ay + t*Dy Now as t assumes any real value, this equation will produce all points along the line. The representation is not uniq...

A DTD is referred to as an internal DTD if elements are declared within the XML files. To reference it as internal DTD, standalone attribute in XML declaration must be set to yes. An XML that describes a note that contains property to, from and message along with internal DTD will look like: <...

In external DTD elements are declared outside the XML file. They are accessed by specifying the system attributes which may be either the legal .dtd file or a valid URL. To reference it as external DTD, the standalone attribute in the XML declaration must be set as no. An XML that describes a note ...

The latest find is always the one the availability check will work against - a unsuccesful find will make AVAILABLE return false: DEFINE TEMP-TABLE tt NO-UNDO FIELD nr AS INTEGER. CREATE tt. tt.nr = 1. CREATE tt. tt.nr = 2. CREATE tt. tt.nr = 3. DISPLAY AVAILABL tt. // yes (tt w...

Recommended way of production deployment calls for using Apache/Nginx for serving the static content. Thus, when DEBUG is false static and media contents fail to load. However, we can load the static content in deployment without having to setup Apache/Nginx server for our app using: python manage....

SSL Certificates use something called public key cryptography.We need to use Https instead of Http because of keeping data secure between servers and improving customer trust. To enable this option in grails, we have to run our app differently. The command below: grails run-app -https

var alertResult = await DisplayAlert("Alert Title", Alert Message, null, "OK"); if(!alertResult) { //do your stuff. } Here we will get Ok click action.

Sometimes it is required to implement Enum on your own. E.g. there is no clear way to extend other enums. Custom implementation allows this: class Enum { constructor(protected value: string) {} public toString() { return String(this.value); } public is(value: Enum | string) { ...

enum SourceEnum { value1 = <any>'value1', value2 = <any>'value2' } enum AdditionToSourceEnum { value3 = <any>'value3', value4 = <any>'value4' } // we need this type for TypeScript to resolve the types correctly type TestEnumType = SourceEnum | AdditionToS...