Tutorial by Examples: u

Analyze functions in a python script

This analyzes a python script and, for each defined function, reports the line number where the function began, where the signature ends, where the docstring ends, and where the function definition ends. #!/usr/local/bin/python3 import ast import sys """ The data we collect. ...

How to Debug nativescript-android App over WiFi (without Root)

1-You need to connect your device to your computer via USB cable. Make sure USB debugging is working. You can check if it shows up when running adb devices(or tns device). 2-Run adb tcpip 5555 3-Disconnect your device (remove the USB cable). 4-Go to the Settings -> About phone -> Status...

Extract fasta sequences from a nucl blastdb

You can extract fasta sequence from a blastdb constructed from a fasta file using blastdbcmd which should be installed when you install makeblastdb. blastdbcmd -entry all -db <database label> -out <outfile> If you had a database called my_database which contained the files my_databas...

Install blast on ubuntu

apt-get install ncbi-blast+ You can check the version that will be installed in advance here: http://packages.ubuntu.com/xenial/ncbi-blast+

[[maybe_unused]]

The [[maybe_unused]] attribute is created for indicating in code that certain logic might not be used. This if often linked to preprocessor conditions where this might be used or might not be used. As compilers can give warnings on unused variables, this is a way of suppressing them by indicating in...

Using ES2017 async/await

The same example above, Image loading, can be written using async functions. This also allows using the common try/catch method for exception handling. Note: as of April 2017, the current releases of all browsers but Internet Explorer supports async functions. function loadImage(url) { return...

Installation or Setup

Detailed instructions on getting qlikview set up or installed.

Performing name lookups in C

The getaddrinfo() function is the recommended POSIX function for interfacing with the system resolver. Depending on system configuration it will perform name lookups in the DNS, /etc/hosts, mDNS, etc. It is preferred over the deprecated gethostbyname() family of functions because it supports both ...

Union operator

The UNION operator is used to combine the result-set (only distinct values) of two or more SELECT statements. Query: (To selects all the different cities (only distinct values) from the "Customers" and the "Suppliers" tables) SELECT City FROM Customers UNION SELECT City FROM ...

Union ALL

UNION ALL to select all (duplicate values also) cities from the "Customers" and "Suppliers" tables. Query: SELECT City FROM Customers UNION ALL SELECT City FROM Suppliers ORDER BY City; Result: Number of Records: 12 City ------- Aachen Albuquerque Anchorage Ann A...

UNION ALL With WHERE

UNION ALL to select all(duplicate values also) German cities from the "Customers" and "Suppliers" tables. Here Country="Germany" is to be specified in the where clause. Query: SELECT City, Country FROM Customers WHERE Country='Germany' UNION ALL SELECT City, Count...

Background images

Full width table cell background images <html xmlns:v="urn:schemas-microsoft-com:vml"> <head> <style> v:* { behavior: url(#default#VML); display: inline-block; } </style> </head> <body> <center> <...

Installation or Setup

Detailed instructions on getting text set up or installed.

Create and Update Patches

Create new patches with hg qnew patch-name and then update them with new changes with hg qrefresh: hg qnew myFirstPatch // Creates a new patch called "myFirstPatch" ... // Edit some files hg qrefresh // Updates "myFirstPatch" with changes hg qnew ...

Push and Pop Patches

Pushing a patch applies the patch to the repository while poping a patch unapplies the patch from the repository. Pop the current patch off the queue with hg qpop and push it back onto the queue with hg qpush: hg qpop hg qpush Pop all patches: hg qpop -a PUsh all patches: hg qpush -a ...

Multiples Queues

More than one queue may be created. Each queue can be thought of as a separate branch. hg qqueue --create foo // Create a new queue called "foo" hg qqueue --list // List all queues hg qqueue --active // Print name of active queue hg qqueue --rename bar // Rename active queue ...

Functional testing as user stories

Functional tests are best described as tests for your user stories. If you've dealt with user stories before they normally follow the following pattern: As a [role], I want to [desire], so that [benefit/desired outcome] For the following examples we'll use this user story as an example: As a Du...

Testing JavaScript with Mink and Selenium

If we want to test JavaScript on a website, we'll need to use something a bit more powerful than Goutte (which is just cURL via Guzzle). There are a couple of options such as ZombieJS, Selenium and Sahi. For this example I'll use Selenium. First you'll need to install the drivers for Mink: $ compo...

Pass data through the middleware chain

From documentation: The HttpContext.Items collection is the best location to store data that is only needed while processing a given request. Its contents are discarded after each request. It is best used as a means of communicating between components or middleware that operate at different poi...

Understanding Django 1.10 middleware's new style

Django 1.10 introduced a new middleware style where process_request and process_response are merged together. In this new style, a middleware is a callable that returns another callable. Well, actually the former is a middleware factory and the latter is the actual middleware. The middleware facto...

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