asp.net barcode scanning Figure 9-14. In this script, you try to coerce a list value into a record. in Objective-C

Paint QR Code in Objective-C Figure 9-14. In this script, you try to coerce a list value into a record.

Figure 9-14. In this script, you try to coerce a list value into a record.
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Figure 9-15. The result of the script shown in Figure 9-14 is an error, telling you that you can t coerce a list into a record. This is not to say, though, that the reverse wouldn t work; in this case, it would have done just fine.
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CHAPTER 9 INTRODUCING OPERATIONS AND COERCION
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The second condition for a successful coercion is that the values themselves fit well with the new value class. For instance, here is what may happen when converting a string into an integer: "3" as integer --> 3 This example worked, but what about this next one "Hello" as integer --> error number 1700 This didn t work because, although the string-to-integer coercion is supported, the actual value you tried to coerce can t be represented as a number. So which classes can be coerced to which The following sections describe most of the common value classes and the coercions supported between them, with some notes and exceptions. The class and constant value classes can be each coerced into a single-item list and into a string. Some constants, such as weekdays and months, can be also coerced into an integer. Here are some examples: Class of {1, 2, 3} as string --> "list" weekday of (current date) as string --> "Monday" weekday of (current date) as integer --> 2
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Boolean Values
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Boolean values can be coerced into a string or an integer (but not into a real): true as string Result: "true" false as string Result: "false" true as integer Result: 1 false as integer Result: 0 A Boolean value can also be coerced to a single-item list: true as list Result: {true}
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Integer
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An integer can be coerced into a string without any restrictions. In addition, an integer can also be coerced into a real, which will be the integer with a decimal point and a zero behind it: 3 as string Result: "3" 3 as real Result: 3.0
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CHAPTER 9 INTRODUCING OPERATIONS AND COERCION
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An integer can also be coerced to a Boolean: 0 coerces to false, and any other number coerces to true. 1 as boolean Result: true And as with most other value classes, you can coerce an integer into a single-item list.
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Real
A real value can be coerced into a string and a single-item list without any trouble. If the real value has no fractional part, such as 10.0 or 2.0, then it can be coerced into an integer as well without changing the numerical value. A nonwhole real value gets rounded automatically in OS X 10.3 and later; in pre OS X 10.3 AppleScript, coercing a nonwhole real into an integer would raise an error.
String
Strings that match the required format can be coerced into integers or real values. Strings can also become a single-item list. Strings can also be coerced to Booleans: "true" and "yes" coerce to true, and all other strings coerce to false.
Date
Dates can be coerced into strings and into a single-item list: (current date) as string Result: "Tuesday, October 28, 2003 5:06:29 PM" The exact format of the resulting date string is determined by the Date and Time tabs in the International panel in System Preferences.
Single-Item List
A single-item list can be coerced to any other class as long as the item in the list can be coerced into that class: {3} as integer Result: 3 {3} as string Result: "3" {"lalala"} as real error 1700
Multi-Item List
A list with multiple items can be coerced into a string only as long as all the items themselves are cool with the notion of turning into strings: {1, 2, {"a", "b"}, (current date), "bumbum", 33.33} as string Result: "12abTuesday, October 28, 2003 5:22:03 PMbumbum33.33" {"garage", "band"} as string Result: "garageband"
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