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Cocoa is Apple's API to develop apps for macOS, formerly known as OS X. Cocoa is a container framework, and contains three sub-frameworks. Foundation AppKit CoreData Cocoa Touch is Apple's version of Cocoa to develop apps for iOS, watchOS and tvOS. Cocoa Touch contains the same sub-framewo...

If you want to download an object from GCS that is publicly viewable, the simplest way is to use a web browser or a command line tool to fetch a URL with this pattern: https://storage.googleapis.com/bucketName/objectName. Example: https://storage.googleapis.com/pub/someOfTheTeam.jpg

You can use git merge --squash to squash changes introduced by a branch into a single commit. No actual commit will be created. git merge --squash <branch> git commit This is more or less equivalent to using git reset, but is more convenient when changes being incorporated have a symbolic...

To apply the last stash and remove it from the stack - type: git stash pop To apply specific stash and remove it from the stack - type: git stash pop stash@{n}

Applies the last stash without removing it from the stack git stash apply Or a specific stash git stash apply stash@{n}

The background-attachment property sets whether a background image is fixed or scrolls with the rest of the page. body { background-image: url('img.jpg'); background-attachment: fixed; } ValueDescriptionscrollThe background scrolls along with the element. This is default.fixedThe backgro...

The background-repeat property sets if/how a background image will be repeated. By default, a background-image is repeated both vertically and horizontally. div { background-image: url("img.jpg"); background-repeat: repeat-y; } Here's how a background-repeat: repeat-y looks lik...

Math.random(); produces an evenly distributed random number between 0 (inclusive) and 1 (exclusive) Example output: 0.22282187035307288 0.3948539895936847 0.9987191134132445

function randomMinMax(min:Number, max:Number):Number { return (min + (Math.random() * Math.abs(max - min))); } This function is called by passing a range of minimum and maximum values. Example: randomMinMax(1, 10); Example outputs: 1.661770915146917 2.5521070677787066 9.4362709657...

function randomAngle():Number { return (Math.random() * 360); } Example outputs: 31.554428357630968 230.4078639484942 312.7964010089636

More complicated tests sometimes need to have things set up before you run the code you want to test. It is possible to do this in the test function itself, but then you end up with large test functions doing so much that it is difficult to tell where the setup stops and the test begins. You can als...

To ignore a file foo.txt in any directory you should just write its name: foo.txt # matches all files 'foo.txt' in any directory If you want to ignore the file only in part of the tree, you can specify the subdirectories of a specific directory with ** pattern: bar/**/foo.txt # matches all file...

Multiple rows can be inserted with a single insert command: INSERT INTO tbl_name (field1, field2, field3) VALUES (1,2,3), (4,5,6), (7,8,9); For inserting large quantities of data (bulk insert) at the same time, DBMS-specific features and recommendations exist. MySQL - LOAD DATA INFILE MSSQL - B...

Travis CI has CMake 2.8.7 pre-installed. A minimal .travis.yml script for an out-of source build language: cpp compiler: - gcc before_script: # create a build folder for the out-of-source build - mkdir build # switch to build directory - cd build # run cmake; here we assume...

The CMake version preinstalled on Travis is very old. You can use the official Linux binaries to build with a newer version. Here is an example .travis.yml: language: cpp compiler: - gcc # the install step will take care of deploying a newer cmake version install: # first we creat...

int a = 1; int *a_pointer = &a; To dereference a_pointer and change the value of a, we use the following operation *a_pointer = 2; This can be verified using the following print statements. printf("%d\n", a); /* Prints 2 */ printf("%d\n", *a_pointer); /* Also prints...

If you need a completely customized view, you'll need to subclass View (the superclass of all Android views) and provide your custom sizing (onMeasure(...)) and drawing (onDraw(...)) methods: Create your custom view skeleton: this is basically the same for every custom view. Here we create the...

Custom views can also take custom attributes which can be used in Android layout resource files. To add attributes to your custom view you need to do the following: Define the name and type of your attributes: this is done inside res/values/attrs.xml (create it if necessary). The following file...

Destructuring allows us to refer to one key in an object, but declare it as a variable with a different name. The syntax looks like the key-value syntax for a normal JavaScript object. let user = { name: 'John Smith', id: 10, email: '[email protected]', }; let {user: userName, id: us...

One way to create a macro is to record it. Start recording a macro and save it to a register (in this example, we'll use a, but it can be any register you could normally yank text to): qa Then run the commands you want to record in the macro (here, we'll surround the contents of a line with &lt...