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The easiest way to set up NumPy on Mac is with pip pip install numpy Installation using Conda. Conda available for Windows, Mac, and Linux Install Conda. There are two ways to install Conda, either with Anaconda (Full package, include numpy) or Miniconda (only Conda,Python, and the package...

Sometimes you want to iterate over a range of dates from a start date to some end date. You can do it using datetime library and timedelta object: import datetime # The size of each step in days day_delta = datetime.timedelta(days=1) start_date = datetime.date.today() end_date = start_date ...

The following examples show two main methods for installing Erlang/OTP on Ubuntu. Method 1 - Pre-built Binary Package Simply run this command and it will download and install the latest stable Erlang release from Erlang Solutions. $ sudo apt-get install erlang Method 2 - Build and Install from...

$float = 0.123; For historical reasons "double" is returned by gettype() in case of a float, and not simply "float" Floats are floating point numbers, which allow more output precision than plain integers. Floats and integers can be used together due to PHP's loose casti...

Option 1: Leiningen Requires JDK 6 or newer. The easiest way to get started with Clojure is to download and install Leiningen, the de facto standard tool to manage Clojure projects, then run lein repl to open a REPL. Linux curl https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/l...

Python 2.x2.7 In Python 2 there are two variants of string: those made of bytes with type (str) and those made of text with type (unicode). In Python 2, an object of type str is always a byte sequence, but is commonly used for both text and binary data. A string literal is interpreted as a byte s...

The standard division symbol (/) operates differently in Python 3 and Python 2 when applied to integers. When dividing an integer by another integer in Python 3, the division operation x / y represents a true division (uses __truediv__ method) and produces a floating point result. Meanwhile, the ...

While using scaffolding is a fast and easy if you are new to Rails or you are creating a new application, later it can be useful just to do it on your own ato avoid the need to go through the scaffold-generated code to slim it down (remove unused parts, etc.). Creating a model can be as simple as c...

Ruby on Rails provides a model generator you can use to create ActiveRecord models. Simply use rails generate model and provide the model name. $ rails g model user In addition to the model file in app/models, the generator will also create: the Test in test/models/user_test.rb the Fixtures ...

Step 1: Open a Workbook Step 2 Option A: Press Alt + F11 This is the standard shortcut to open the VBE. Step 2 Option B: Developer Tab --> View Code First, the Developer Tab must be added to the ribbon. Go to File -> Options -> Customize Ribbon, then check the box for developer. ...

In Python 2, reduce is available either as a built-in function or from the functools package (version 2.6 onwards), whereas in Python 3 reduce is available only from functools. However the syntax for reduce in both Python2 and Python3 is the same and is reduce(function_to_reduce, list_to_reduce). A...

Getting setup with Spring Boot for the first time is quite fast thanks to the hard work of the Spring Community. Prerequisites: Java installed Java IDE Recommended not required (Intellij, Eclipse, Netbeans, etc.) You don't need to have Maven and/or Gradle installed. The projects generate...

Sometimes you have to check for a condition and set the value of a variable. For ex. String name; if (A > B) { name = "Billy"; } else { name = "Jimmy"; } This can be easily written in one line as String name = A > B ? "Billy" : "Jimmy&quo...

Windows Verify that you have the correct JDK. You can check it by opening command prompt (press windows key and write cmd). In the command prompt type javac -version, this will show the current version of JDK installed on your matching or an error* if Java is missing. If the JDK is not availabl...

Suppose you have a UILabel on your storyboard and you have created an IBOutlet for it in ViewController.swift / ViewController.m and named it labelOne. To make the changes easily visible, change the backgroundColor and textColor of labelOne in the viewDidLoad method: The function sizeToFit is use...

Following is an implementation that demonstrates how an object can be serialized into its corresponding JSON string. class Test { private int idx; private String name; public int getIdx() { return idx; } public void setIdx(int idx) { this.idx = idx; ...

Errors thrown from promises are handled by the second parameter (reject) passed to then or by the handler passed to catch: throwErrorAsync() .then(null, error => { /* handle error here */ }); // or throwErrorAsync() .catch(error => { /* handle error here */ }); Chaining If you hav...

ALTER TABLE Employees DROP COLUMN salary; This will not only delete information from that column, but will drop the column salary from table employees(the column will no more exist).

A custom component that takes the type of a component as input and creates an instance of that component type inside itself. When the input is updated, the previously added dynamic component is removed and the new one added instead. @Component({ selector: 'dcl-wrapper', template: `<div #...

Simple: NSString *newString = @"My String"; From multiple strings: NSString *stringOne = @"Hello"; NSString *stringTwo = @"world"; NSString *newString = [NSString stringWithFormat:@"My message: %@ %@", stringOne, stringTwo]; Usi...