Tutorial by Examples: re

import gzip import os outfilename = 'example.txt.gz' output = gzip.open(outfilename, 'wb') try: output.write('Contents of the example file go here.\n') finally: output.close() print outfilename, 'contains', os.stat(outfilename).st_size, 'bytes of compressed data' os.system('file...

A very common use-case in web applications is performing multiple asynchronous (eg. HTTP) requests and gathering their results as they arrive or all of them at once (eg. in Angular2 with the HTTP service). 1. Gathering async responses one by one as they arrive This is typically done with mergeMap(...

class GuestsCleanupJob < ApplicationJob queue_as :default def perform(*guests) # Do something later end end

After installing Visual studio code configure .net core and C#. Configure C# based on market-place. Reference Url: C# market place .net core Launch Visual studio code. Press [ctrl + P] paste "ext install csharp" this and hit. Once done above steps , C# extension available i...

Create your new project folder and open in windows-command prompt with the location of project folder. Type "dotnet new -t web" and hit. This is for creating new mvc template. Once complete. GO to the project location and see basic mvc project has been created. The...

In our AppServiceProvider.php public function boot() { HasMany::macro('toHasOne', function() { return new HasOne( $this->query, $this->parent, $this->foreignKey, $this->localKey ); }); } Suppose we have shop modal and ...

Finding documentation for a feature is often as simple as a search using a good search engine. If that fails, or if unsure about specific terms, the Windows API Index can help locate specific features. Documentation for methods, interfaces, enumerations and constants can usually be found by searchin...

FlinkKafkaConsumer let's you consume data from one or more kafka topics. versions The consumer to use depends on your kafka distribution. FlinkKafkaConsumer08: uses the old SimpleConsumer API of Kafka. Offsets are handled by Flink and committed to zookeeper. FlinkKafkaConsumer09: uses the new ...

/** * requestdata - the data packet expected to be passed in by external system * JSON - data format exchange * stringify() convert javascript object into a string with JSON.stringify() * nlobjError - add in catch block to log exceptions */ function GetCustomerData(requestdata) { ...

Create an F# console application. Change the Output type of the application to Windows Application. Add the FsXaml NuGet package. Add these four source files, in the order listed here. MainWindow.xaml <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ...

import numpy as np import matplotlib.pyplot as plt # create some data x = np.arange(-2, 20, 0.5) # values of x y1 = map(lambda x: -4.0/3.0*x + 16, x) # values of y1(x) y2 = map(lambda x: 0.2*x**2 -5*x + 32, x) # svalues of y2(x) fig = plt.figure() ax1 = fig.add_subplo...

REPEAT, will repeat itself forever unless you explicitly exit the loop: //Runs forever REPEAT: // Do stuff END. To exit the loop you can use the LEAVE keyword. With or without a label. Without a label LEAVE will always effect the current loop. With a name you can specify what loop to LEAV...

Recoding missing values Regularly, missing data isn't coded as NA in datasets. In SPSS for example, missing values are often represented by the value 99. num.vec <- c(1, 2, 3, 99, 5) num.vec ## [1] 1 2 3 99 5 It is possible to directly assign NA using subsetting num.vec[num.vec == 99]...

See Missing values for details. > TRUE & NA [1] NA > FALSE & NA [1] FALSE > TRUE || NA [1] TRUE > FALSE || NA [1] NA

const Schema = mongoose.Schema; const ObjectId = Schema.Types.ObjectId; const Article = new Schema({ title: { type: String, unique: true, required: [true, 'Article must have title'] }, author: { type: ObjectId, ref: 'User' } }); module.exports = mongoose....

You can create custom dialogs which contains many component and perform many functionality on it. It behaves like second stage on owner stage. In the following example an application that shows person in the main stage tableview and creates a person in a dialog (AddingPersonDialog) prepared. GUIs c...

/** * data - passed in object * switch - get file extension if there is one * nlapiCreateFile - create file in File Cabinet * nlapiAttachRecord - attach file to record */ function StoreAttachFile(data) { var record_type = data.recordType var record_id = data.recordId; ...

Making a sequence of HTTP requests has two primary reasons: Requests are depending on each other (the result from one requests is required for a consecutive request). We want to spread server load into multiple requests. 1. Making multiple dependent requests This can be performed usi...

The following code will attempt to execute loadFromHttp() up to 5 times (maxAttempts), with each attempt delayed by as many seconds. If maxAttempts is surpassed, the Observable gives up. // assume loadFromHttp() returns a Promise, which might fail. Rx.Observable.from(loadFromHttp()) ....

Safari To return the URL of the current tab in Safari, use URL of current tab: tell application "Safari" return URL of current tab of window 1 end tell Google Chrome To return the URL of the current tab in Google Chrome, use URL of active tab: tell application "Google Chr...