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• Swift Converter 3 8 75 Inches
• Swift Converter 3 8 75 Km
• Swift Converter 3 8 75 Cm
• Swift Converter 3 8 75 Inch

As we approach the release of Xcode 8 and Swift 3, we face the inevitable task of upgrading our old Swift 2.x code to the new syntax in Swift 3, including the major reworking of Foundation and UIKit names that has become known as the Grand Renaming.

Swift Converter 3 8 75 Inches

If you’ve been through a major Swift version change before, you know the drill: Xcode will offer to convert your source automatically to the new syntax which will usually get you 80% of the way to building successfully. The last 20% is made up of usage that Xcode couldn’t determine the correct fix for. It’s up to you to fix these items manually before your project will build again.

And yes, for the moment you can stick with Swift 2.3 in Xcode 8

First off, the automatic conversion by Xcode is a great place to start. It’ll handle most of the easy changes for you. You should, of course, review these changes to see what’s being changed an ensure none of the underlying logic is modified. But you should also want to know the state of your code!

Here are some common types of automatic conversions that Xcode will provide for you:

Underscores in method signatures

The biggest change you’ll probably see in your code is lots of method signatures gaining _ as their first external parameter. This is to counter the new syntax that requires using the first parameter name by default when calling a method. Rather than changing all your method calls, it’s easier for Xcode to behave as it did in Swift 2.x and keep those calls the same.

However, the thinking behind using the first parameter name is sound! You’ll still want to make those changes so you have first argument names, but that’s a change that can be done during your manual conversion phase or in a post-conversion cleanup.

Private becomes fileprivate

All your declarations that were formerly private will now be fileprivate which is the new keyword that behaves exactly as private did previously, restricting access to the current file. The new private allows access only within the current declaration, restricting access even further than before.

In many cases where you’re simply being safe by restricting access to an API, you can change this back to private as it was before without an issue. However, if you’re an avid extension user you might want to stick with fileprivate as these properties won’t be visible to extensions in the current file with private.

Grand Transition Renaming

There are a lot of items that fall into this bucket and are renamed automatically for you, here’s some common ones that you’ll likely run into:

The NS (NextStep!) prefix has been removed from the vast majority of APIs and many singleton-like patterns (sharedX, defaultY, etc) are no longer methods but properties. In addition, what used to be sharedManager or sharedApplication is now just shared.

• NSNotificationCenter.defaultCenter() is now NotificationCenter.default with additional renaming such as postNotificationName -> post
• Names for notifications are no longer strings but enums of the type Notification.Name
• NSBundle.mainBundle().pathForResource is now Bundle.main.path 🌟
• .respondsToSelector() is now .responds(to: #selector())
• componentsSeparatedByString('.') is now components(separatedBy: '.')
• NSUserDefaults.standardUserDefaults() is now UserDefaults.standard with additional renaming such as objectForKey() -> object(forKey:)
• NSProcessInfo.processInfo is now ProcessInfo.processInfo
• enumerate() on arrays and dictionaries is now enumerated()
• NSFileManager.defaultManager() is now FileManager.default
• NSDate is now just Date! 🌟
• NSDateFormatter is now just DateFormatter
• NSUTF8StringEncoding is now much more reasonably named with String.Encoding.utf8
• dispatch_queue_create and similar have been drastically simplified to names such as DispatchQueue 🌟

One note from an item that was not converted: Your Swift strings are still String and their Objective-C counterparts are still NSString because they’re distinct and removing the NS prefix would obviously cause some weird collisions.

Maybe you’ve been feeling the unswifty-ness of those old Objective-C naming conventions and using some better ones already. If not, now is a great time to get a handle on the better naming conventions for Swift and starting to adopt them in your code.

In addition to the naming conventions, many of these types get proper mutability handling when using let and var like you would see in a native Swift struct.

Multiple unwrapping conditionals

Previously you could trim additional lets from the inside of conditional unwraps but this is no longer the case:

The additional lets and vars must now be in place!

Conditions no longer contain where

Earlier syntax would let you insert where into conditionals, making your if let statements feel a bit more like natural English. No longer is this the case, they’ve been replaced with a simple comma 😢

These are just some of the big items you’ll run into when looking at your diffs after running the Xcode automatic migration. But even that probably won’t get you to a buildable state. Next, we’ll investigate the manual changes you might need to make before your app is completely converted to Swift 3.

Scale a measurement to a larger or smaller measurement, which is useful for architecture, modelling, and other projects. You can also add the real size and scaled size to find the scale factor.

Find the Scale Factor

Scaled Results:

Swift Converter 3 8 75 Km

Scale Factor

Scaled Size

Scale Factor

Scaled Size

On this page:

How to Scale a Measurement Larger or Smaller

Swift Converter 3 8 75 Cm

Making a measurement smaller or larger, known as scale conversion, requires a common scale factor, which can be used to multiply or divide all measurements by.

To scale a measurement to a smaller measurement, for instance when making a blueprint, simply divide the real measurement by the scale factor. The scale factor is commonly expressed as 1:n or 1/n, where n is the factor. For example, if the scale factor is 1:8 and the real measurement is 32, divide 32 ÷ 8 = 4 to convert.

To convert a measurement to a larger measurement simply multiply the real measurement by the scale factor. For example, if the scale factor is 1:8 and the measured length is 4, multiply 4 × 8 = 32 to convert.

Reducing the Scale Factor

The methods above to convert a measurement assume the scale factor is in the form of 1:n or 1/n, which means some additional work is needed if the ratio is 2:3, for example. When the scale factor is not in an even 1:n ratio it will need to be reduced to 1:n. Use our ratio calculator to reduce a ratio. A ratio can also be reduced by dividing both the numerator and the denominator by the numerator.

For example: 2/3 can be reduced by dividing both numbers by 2, which would be 1/1.5 or 1:1.5.

2 ÷ 2 = 1
3 ÷ 2 = 1.5
scale factor = 1:1.5

Commonly Used Architectural Scales

Commonly Used Model Scales

Swift Converter 3 8 75 Inch

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