[List.Item:]
Retrieves the Nth item from a list.
Macro Compatibility
The macro can be used in all input document types and in Report Studio.
Usage
Use the [List.Item:] macro to retrieve the Nth item from a list of items. In Legacy Mode, the items specified by the 'values' parameter are delimited by a single character (by default, a semicolon). The first item is at N = 0. If the list is empty or you ask for an item outside of the list, you will receive an error. Blank items ('whitespace') in lists are included. So a list of '1;2;;4;5' would have five items, with indexes 0, 1, 2, 3 and 4. If you want to ignore whitespace items, use includeWhitespaceItems=false.
Parameter | Type | Presence | Purpose | Options | Default |
---|---|---|---|---|---|
Int32 | Mandatory | Specifies the Nth item (the first is N=0) |
|
N/A | |
List<Object> | Mandatory | The list of input values. In Legacy Mode, they should be split by the delimiter character. | N/A | N/A | |
String | Optional | Post processing formula. Use {value} for the macro output, e.g. {value}/1024. | N/A | N/A | |
Boolean | Optional | Whether to color table cells if thresholds are breached, rather than color the text. |
|
true | |
String | Optional | Add a comment to make your document template more readable. The comment is discarded in the output document. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'critical' if the output is after this DateTime UTC. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'critical' if the output is before this DateTime UTC. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the output is equal to this value. | N/A | N/A | |
Color | Optional | The critical font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The critical font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the critical font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The macro is considered 'critical' if the output is greater than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the output is greater than this value. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the expression evaluates to true. Use 'value' as the macro output in the expression. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the output is less than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the output is less than this value. | N/A | N/A | |
String | Optional | The macro is considered 'critical' if the output is not equal to this value. | N/A | N/A | |
Color | Optional | The critical table cell background color to use. |
|
N/A | |
Char | Optional | The delimiter character to delimit text-based input lists (e.g. 1;2;3;4). When this parameter is set and 'listDelimiter' is NOT set, this acts as both the input and output list delimiter. | N/A | ; | |
DateTimeOffset | Optional | The macro is considered 'error' if the output is after this DateTime UTC. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'error' if the output is before this DateTime UTC. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the output is equal to this value. | N/A | N/A | |
Color | Optional | The error font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the error font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The error font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the error font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The macro is considered 'error' if the output is greater than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the output is greater than this value. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the expression evaluates to true. Use 'value' as the macro output in the expression. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the output is less than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the output is less than this value. | N/A | N/A | |
String | Optional | The macro is considered 'error' if the output is not equal to this value. | N/A | N/A | |
Boolean | Optional | Should NCalc expression evaluation throw error on Overflow |
|
true | |
Color | Optional | The error table cell background color to use. |
|
N/A | |
String | Optional | The text to display should the macro fail to execute. Note that a poorly-specified macro (e.g. omitting mandatory parameters) will still result in an error message. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'fatal' if the output is after this DateTime UTC. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'fatal' if the output is before this DateTime UTC. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the output is equal to this value. | N/A | N/A | |
Color | Optional | The fatal font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the fatal font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The fatal font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the fatal font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The macro is considered 'fatal' if the output is greater than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the output is greater than this value. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the expression evaluates to true. Use 'value' as the macro output in the expression. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the output is less than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the output is less than this value. | N/A | N/A | |
String | Optional | The macro is considered 'fatal' if the output is not equal to this value. | N/A | N/A | |
Color | Optional | The fatal table cell background color to use. |
|
N/A | |
Color | Optional | The font background color to use. |
|
N/A | |
Boolean | Optional | Change the font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The font color to use. |
|
N/A | |
Double | Optional | Change the font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The formatting to use for numbers. You can also specify 'format=string' to force numbers to be treated as strings. | N/A | N/A | |
Boolean | Optional | Whether to hide the macro output. |
|
false | |
String | Optional | The condition that must be true in order for the macro to be executed/evaluated. Must either evaluate to true or false, for example: "3+5=8" or "contains('abcd', 'z'). | N/A | true | |
Boolean | Optional | Whether to include whitespace items. |
|
true | |
DateTimeOffset | Optional | The macro is considered 'info' if the output is after this DateTime UTC. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'info' if the output is before this DateTime UTC. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the output is equal to this value. | N/A | N/A | |
Color | Optional | The info font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the info font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The info font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the info font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The macro is considered 'info' if the output is greater than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the output is greater than this value. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the expression evaluates to true. Use 'value' as the macro output in the expression. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the output is less than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the output is less than this value. | N/A | N/A | |
String | Optional | The macro is considered 'info' if the output is not equal to this value. | N/A | N/A | |
Color | Optional | The info table cell background color to use. |
|
N/A | |
Char | Optional | In Legacy Mode only, the delimiter character to delimit the output list, UNLESS only 'delimiter' is set, in which case 'delimiter' acts as both the input and output list delimiter. | N/A | ; | |
MacroMode | Optional | The mode in which variables are stored. In the legacy mode (default for Schedules), the variable created is a string and formatted. In the normal mode (default for Report Studio), the output variable is stored as a strongly-typed object, e.g. an Int32 or a List |
|
Legacy | |
Color | Optional | The normal font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the normal font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The normal font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the normal font size in points. If omitted, no change is made. |
|
N/A | |
Color | Optional | The normal table cell background color to use. If omitted, no change is made. |
|
N/A | |
ObfuscationType | Optional | Obfuscation type. Use obfuscation to write reports where sensitive data is hidden. When used, ReportMagic guarantees that the same input string will map to the same output string for the whole of the report (but the next time the report runs, it will most likely map to a different value). If you use obfuscation, the property in your macro will not show up and instead, you will see a fake item of the obfuscation type chosen. |
|
None | |
Normal mode |
Boolean | Optional | Any macros that output lists can optionally (in Normal mode) output a jArray instead. |
|
true |
Boolean | Optional | Whether substituted variables are hidden from macro results (and the word 'REDACTED' will appear in progress screens and elsewhere in the web UI). |
|
false | |
Boolean | Optional | Whether to exclude duplicates. |
|
false | |
Normal mode |
Boolean | Optional | In Normal Mode and for macros that output JArrays only, whether to convert a JArray of single-property jObjects into a flat JArray of values. |
|
false |
String | Optional | The variable to store the result as. | N/A | N/A | |
String | Optional | The variable to store the result as, while hiding the output. Equivalent to 'storeAs=ThisValue, hidden=true'. | N/A | N/A | |
Char | Optional | The delimiter used by storeAs to split the input (Legacy mode only), when there are multiple stored variables. For example, in this macro, we indicate that the value to be stored should be split by the asterisk when being stored: [String:value=a*b*c*d, storeAs=var1;var2;var3;var4, storeAsVariableDelimiter=*] | N/A | ; | |
String | Optional | The name of the STRING variable to store the result as and output (both will use the same format) into the report. Note that if you also use 'storeAsHidden' in the same macro, you should not expect the output to be hidden, as this parameter overrides that. | N/A | N/A | |
Boolean | Optional | Whether to trim leading and trailing whitespace on input items. The trim operation is done BEFORE other operators such as selecting distinct items or sorting. |
|
false | |
String | Optional | If specified, adds a warning message for this macro. This is processed as an NCalc, and the warning message will ALWAYS be present and will be the value of the evaluated NCalc expression. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'warning' if the output is after this DateTime UTC. | N/A | N/A | |
DateTimeOffset | Optional | The macro is considered 'warning' if the output is before this DateTime UTC. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the output is equal to this value. | N/A | N/A | |
Color | Optional | The warning font background color to use. If omitted, no change is made. |
|
N/A | |
Boolean | Optional | Change the warning font weight (true=strong, false=normal). If omitted, no change is made. |
|
N/A | |
Color | Optional | The warning font color to use. If omitted, no change is made. |
|
N/A | |
Double | Optional | Change the warning font size in points. If omitted, no change is made. |
|
N/A | |
String | Optional | The macro is considered 'warning' if the output is greater than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the output is greater than this value. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the expression evaluates to true. Use 'value' as the macro output in the expression. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the output is less than or equal to this value. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the output is less than this value. | N/A | N/A | |
String | Optional | The macro is considered 'warning' if the output is not equal to this value. | N/A | N/A | |
Color | Optional | The warning table cell background color to use. |
|
N/A |
Examples (11)
Example 1: Normal mode
This Normal Mode example demonstrates how to select the second item (index=1) from a JArray (a list of JObjects), followed by the [Calculate:] macro shorthand [.:] to choose a property from the JObject:
// Create a JArray (list of JObjects) [Array: value=`[ { "Name" : "Bruce Wayne", "Alias" : "Batman" }, { "Name" : "Clark Kent", "Alias" : "Superman" } ]`, =>Superheroes] // Choose the second item (index=1, because index=0 is the first item) and store as a variable called 'Superhero' [List.Item: values={=Superheroes}, index=1, mode=Normal, =>Superhero] // Use the Calculate macro shorthand to select the Alias property from the Superhero variable The second best superhero is [.:Superhero.Alias]
Outputs:
SupermanExample 2: Normal mode
This Normal Mode example demonstrates how to select the third (index=2) non-empty item (because 'includeWhitespaceItems' is set to false), from a JArray (a list of JObjects):
// Use the Calculate macro shorthand to create a list (a JArray of strings) that includes some empty items [=:`list('Apple', 'Banana', '', '', 'Canteloupe')`, =>Fruits] // Select the third (index=2) item in the list, ignoring the empty items (of which there are two) [List.Item: values={=Fruits}, index=2, includeWhitespaceItems=false, =>Fruity]
Outputs:
CanteloupeExample 3: Normal mode
This Normal Mode example demonstrates how the 'includeWhitespaceItems' parameter works when using a list as input. Notice how the first [List.Item:] macro outputs D while the second outputs E:
[=: `list('A','B','','D','E')`, =>List1] [List.Item: values={=List1}, index=3, includeWhitespaceItems=true, mode=Normal] [List.Item: values={=List1}, index=3, includeWhitespaceItems=false, mode=Normal]
Example 4: Normal mode
This Normal Mode example shows how to select an item from a 'table' (list of lists):
// Create a 'table' (a list of lists) [=: `list(list('A','B','C','D','E'), list('F','G','H','I','J'), list('K','L','M','N','O'))`, =>List1] // Find the second (index=1) 'row' in the table [List.Item: values={=List1}, index=1]
Outputs:
[ "F", "G", "H", "I", "J" ]Example 5: Normal mode
This Normal Mode example shows how to select an item from an array / list of JObjects (property name and value pairs):
// Create the array of JObjects [Array: value=`[ { "Pet" : "Dog" }, { "Pet" : "Cat" }, { "Pet" : "Fish" }, { "Pet" : "Rabbit" } ]`, =>Pets] // Find the fourth (index=3) item in the list and save as a JObject variable called 'Item' [List.Item: values={=Pets}, index=3, =>Item] // Use the Calculate macro shorthand to output the 'Pet' property in the 'Item' variable The pet is a [.:Item.Pet]
Outputs:
{ "Pet" : "Rabbit" }Example 6:
[List.Item:values=a;b;c, index=0, storeAs=Item]
Outputs:
aExample 7:
[List.Item:values=a;b;c, index=2]
Outputs:
cExample 8:
[List.Item:values=A;A, index=1]
Outputs:
AExample 9:
[List.Item:values=A;;B, index=1]
Example 10:
In this example, whitespace items are NOT included:
[List.Item:values=A;;B, index=1, includeWhitespaceItems=false]
Outputs:
BExample 11:
In this example, whitespace items are included, so a blank string ('') is returned:
[List.Item:values=A;;B, index=1, includeWhitespaceItems=true]