Tutorial by Examples: re

There is a signal WINCH ( WINdowCHange), which is fired when one resizes a terminal window. declare -x rows cols update_size(){ rows=$(tput lines) # get actual lines of term cols=$(tput cols) # get actual columns of term echo DEBUG terminal window has no $rows lines and is $cols chara...

Using a pipe makes the output of a command be the input of the next one. ls -1 | grep -c ".conf" In this case the ouput of the ls command is used as the input of the grep command. The result will be the number of files that include ".conf" in their name. This can be used to ...

This will get all the orders for all customers: SELECT c.CustomerName, o.OrderID FROM Customers AS c INNER JOIN Orders AS o ON c.CustomerID = o.CustomerID ORDER BY c.CustomerName, o.OrderID; This will count the number of orders for each customer: SELECT c.CustomerName, C...

element.style only reads CSS properties set inline, as an element attribute. However, styles are often set in an external stylesheet. The actual style of an element can be accessed with window.getComputedStyle(element). This function returns an object containing the actual computed value of all the ...

In this example, we are going to create an image picker that previews your picture before uploading. The previewer also supports drag and dropping files into the input. In this example, I am only going to cover uploading single files, but you can tinker a bit to get multi file upload working. image...

M-x magit-status s RET <file-to-stage> RET c c <commit message> C-c C-c q

nginx -s reload

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; NSURL *URL = [NSURL URLWithString:@"http://example.com/download.zip"]; NSURLReq...

This example will show how to make and use animation clips for game objects or players. Note, the models used in this example are downloaded from Unity Asset Store. The player was downloaded from the following link: https://www.assetstore.unity3d.com/en/#!/content/21874. To create animations, firs...

In order to make a RelativeSizeSpan align to the top, a custom class can be derived from the class SuperscriptSpan. In the following example, the derived class is named TopAlignSuperscriptSpan: activity_main.xml: <TextView android:id="@+id/txtView" android:layout_width=&quot...

Add the following method to check whether an email address is valid or not: private boolean isValidEmailId(String email){ return Pattern.compile("^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]{1}|[\\w-]{2,}))@" + "((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?" ...

Add code in your Activity. This would work for Fragment also, no need to add this code in Fragment. @Override public boolean dispatchTouchEvent(MotionEvent ev) { View view = getCurrentFocus(); if (view != null && (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == Moti...

Tags are typically applied via the editor; however, you can also apply tags via script. Any custom tag must be created via the Tags & Layers window before being applied to a game object. Setting Tags in the Editor With one or more game objects selected, you can select a tag from the inspecto...

Set High resolution programmatically. Camera mCamera = Camera.open(); Camera.Parameters params = mCamera.getParameters(); // Check what resolutions are supported by your camera List<Size> sizes = params.getSupportedPictureSizes(); // Iterate through all available resolutions and choos...

I have created GeoFenceObserversationService singleton class. GeoFenceObserversationService.java: public class GeoFenceObserversationService extends Service implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, ResultCallback<Status> { protected s...

preg_replace_callback works by sending every matched capturing group to the defined callback and replaces it with the return value of the callback. This allows us to replace strings based on any kind of logic. $subject = "He said 123abc, I said 456efg, then she said 789hij"; $regex = &q...

By default stored procedures and functions or not generated by mysqldump, you will need to add the parameter --routines (or -R): mysqldump -u username -p -R db_name > dump.sql When using --routines the creation and change time stamps are not maintained, instead you should dump and reload the ...

#include <stddef.h> /* for offsetof() */ #include <stdlib.h> /* for exit() */ #include <stdio.h> /* for perror() */ #include <string.h> /* for strcmp() */ #include <unistd.h> /* for close(), unlink() */ #include <fcntl.h> /* for open() */ #incl...

In [1]: import pandas as pd In order to run a query in BigQuery you need to have your own BigQuery project. We can request some public sample data: In [2]: data = pd.read_gbq('''SELECT title, id, num_characters ...: FROM [publicdata:samples.wikipedia] ...: ...

If you have created service account and have private key json file for it, you can use this file to authenticate with pandas In [5]: pd.read_gbq('''SELECT corpus, sum(word_count) words FROM [bigquery-public-data:samples.shakespeare] GROUP BY co...