Tutorial by Examples: bi

Observable.combineLatest(firstName.rx_text, lastName.rx_text) { $0 + " " + $1 } .map { "Greetings, \($0)" } .bindTo(greetingLabel.rx_text) Using the combineLatest operator every time an item is emitted by either of two Observables, combine the latest item emitted by each Obs...

You can define a method to accept an arbitrary number of keyword arguments using the double splat (**) operator: def say(**args) puts args end say foo: "1", bar: "2" # {:foo=>"1", :bar=>"2"} The arguments are captured in a Hash. You can manip...

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This example finds an array of approximately evenly spaced points along a cubic Bezier curve. It decomposes Path segments created with context.bezierCurveTo into points along that curve. // Return: an array of approximately evenly spaced points along a cubic Bezier curve // // Attribution: Stack...

Use the uncurry function (from Prelude or Data.Tuple) to convert a binary function to a function on tuples. uncurry (+) (1, 2) -- computes 3 uncurry map (negate, [1, 2, 3]) -- computes [-1, -2, -3] uncurry uncurry ((+), (1, 2)) -- computes 3 map (uncurry (+)) [(1, 2), (3, 4), (5, 6)] -- co...

If you'd like to quickly test if an ability class is giving the correct permissions, you can initialize an ability in the console or on another context with the rails environment loaded, just pass an user instance to test against: test_ability = Ability.new(User.first) test_ability.can?(:show, Pos...

Given the 4 points of a cubic Bezier curve the following function returns its length. Method: The length of a cubic Bezier curve does not have a direct mathematical calculation. This "brute force" method finds a sampling of points along the curve and calculates the total distance spanne...

In addition to image classification datasets, Caffe also have "HDF5Data" layer for arbitrary inputs. This layer requires all training/validation data to be stored in hdf5 format files. This example shows how to use python h5py module to construct such hdf5 file and how to setup caffe &quo...

To fold (combine) two patches: hg qnew firstPatch // Create first patch hg qnew secondPatch // Create second patch hg qpop // Pop secondPatch hg qfold secondPatch // Fold secondPatch with firstPatch

To use opacity in all versions of IE, the order is: .transparent-element { /* for IE 8 & 9 */ -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=60)"; // IE8 /* works in IE 8 & 9 too, but also 5, 6, 7 */ filter: alpha(opacity=60); // IE 5-7 /* Modern Browse...

Newtonsoft's Json.NET allows you to bind json dynamically (using ExpandoObject / Dynamic objects) without the need to create the type explicitly. Serialization dynamic jsonObject = new ExpandoObject(); jsonObject.Title = "Merchent of Venice"; jsonObject.Author = "William Shakes...

textOnCurve(text,offset,x1,y1,x2,y2,x3,y3,x4,y4) Renders text on quadratic and cubic curves. text is the text to render offset distance from start of curve to text >= 0 x1,y1 - x3,y3 points of quadratic curve or x1,y1 - x4,y4 points of cubic curve or Example usage: textOnCurve("...

Sometimes we need to perform basic operations like hide/show view based on single value, for that single variable we cannot create model or it is not good practice to create model for that. DataBinding supports basic datatypes to perform those oprations. <layout xmlns:android="http://schema...

When making a bind of something, for example a date you may want to show it in a specific format without messing around with it in the code. To do this we can use the StringFormat property. Here are some examples: Text="{Binding Path=ReleaseDate, StringFormat=dddd dd MMMM yyyy}" This...

SVG Patterns behave significantly differently than CSS background images when filling equivalent shapes. This can lead to significant surprises for new-comers to SVG. Below are examples of a pattern defined in all possible combinations of patternUnits and patternContentUnits - showing how these sett...

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...

Bit-fields give an ability to declare structure fields that are smaller than the character width. Bit-fields are implemented with byte-level or word-level mask. The following example results in a structure of 8 bytes. struct C { short s; /* 2 bytes */ char c; /* 1 ...

Emacs' documentation uses a consistent notation for all key bindings, which is explained here: Key chords A "key chord" is obtained by pressing two or more keys simultaneously. Key chords are denoted by separating all keys by dashes (-). They usually involve modifier keys, which are put ...

Capabilities of the Canvas Canvas lets you programmatically draw onto your webpage: Images, Texts, Lines and Curves. Canvas drawings can be extensively styled: stroke width, stroke color, shape fill color, opacity, shadowing, linear gradients and radial gradients, font face, font ...