michaelkeevildown

Credit Card Regex

• Amex Card: ^3[47][0-9]{13}$
• BCGlobal: ^(6541|6556)[0-9]{12}$
• Carte Blanche Card: ^389[0-9]{11}$
• Diners Club Card: ^3(?:0[0-5]|[68][0-9])[0-9]{11}$
• Discover Card: ^65[4-9][0-9]{13}|64[4-9][0-9]{13}|6011[0-9]{12}|(622(?:12[6-9]|1[3-9][0-9]|[2-8][0-9][0-9]|9[01][0-9]|92[0-5])[0-9]{10})$
• Insta Payment Card: ^63[7-9][0-9]{13}$
• JCB Card: ^(?:2131|1800|35\d{3})\d{11}$
• KoreanLocalCard: ^9[0-9]{15}$

valyala

Optimizing postgresql table for more than 100K inserts per second

• Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
• Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
• Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
• Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
• Add synchronous_commit = off to postgresql.conf.
• Use table inheritance for fast removal of old data:

gtomek

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeWidth(50);
        // Setting the color of the circle
        mPaint.setColor(Color.BLUE);

        // Draw the circle at (x,y) with radius 250

lopspower

Difference between -nodpi and -anydpi

Android Studio exposes developers to -nodpi and -anydpi in various places. For example, if you use the New Resource Directory wizard thing, and you choose to add a density qualifier to the directory, you will see "No Density" (-nodpi) and "Any Density" (-anydpi) options.

Some of you might expect these to be well-documented.

In a word, no.

However, courtesy of a fair amount of experimentation (largely done as part of work on this Stack Overflow question and this answer), their use becomes at least a bit clearer. Many thanks to Stack Overflow user rds for the help!

mbejda

jawinn

// FIT LAYER TO CANVAS
// via https://forums.adobe.com/message/5413957#5413957
var maintainAspectRatio;// set to true to keep aspect ratio  
if(app.documents.length>0){  
    app.activeDocument.suspendHistory ('Fit Layer to Canvas', 'FitLayerToCanvas('+maintainAspectRatio+')');  
}  
function FitLayerToCanvas( keepAspect ){// keepAspect:Boolean - optional. Default to false  
    var doc = app.activeDocument;  
    var layer = doc.activeLayer;  
    // do nothing if layer is background or locked  

Antarix

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

	<ProgressBar
              android:id="@+id/progress_limit"
                    style="?android:attr/progressBarStyleHorizontal"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"

marioplumbarius

<?php
  // openning connection	
	$link = mysqli_connect('host', 'user', 'password', 'database')
		or die('Could not connect to server'.'<br>');
	
	// uncomment next line to debug
	//print 'connection opened'.'<br>';
?>