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Update docs/example for lambda function.

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John McNamara 2022-12-28 12:33:50 +00:00
parent 7f5745c1a3
commit b3059c805d
5 changed files with 6 additions and 13 deletions
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docs/src/examples.dox
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@ -778,8 +778,7 @@ Example of hiding worksheet errors and warnings.
Example of using the new Excel `LAMBDA()` function. It demonstrates how to
create a lambda function in Excel and also how to assign a name to it so that
it can be called as a user defined function. This particular example converts
from Fahrenheit to Celsius. Note, this function is only currently available if
you are subscribed to the Microsoft Office Beta Channel program.
from Fahrenheit to Celsius.
@image html lambda01.png

3
docs/src/examples.txt
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@ -355,8 +355,7 @@ Example of hiding worksheet errors and warnings.
Example of using the new Excel `LAMBDA()` function. It demonstrates how to
create a lambda function in Excel and also how to assign a name to it so that
it can be called as a user defined function. This particular example converts
from Fahrenheit to Celsius. Note, this function is only currently available if
you are subscribed to the Microsoft Office Beta Channel program.
from Fahrenheit to Celsius.
@image html lambda01.png

2
docs/src/working_with_formulas.dox
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@ -268,7 +268,7 @@ following:
@note At the time of writing the `LAMBDA()` function in Excel is only
available to Excel 365 users subscribed to the Beta Channel updates.
Beta Channel versions of Excel 365 have introduced a powerful new
Recent versions of Excel 365 have introduced a powerful new
function/feature called `LAMBDA()`. This is similar to
[lambda expressions]
(https://docs.microsoft.com/en-us/cpp/cpp/lambda-expressions-in-cpp?view=msvc-160)

11
examples/lambda.c
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@ -1,7 +1,6 @@
/*
* An example of using the new Excel LAMBDA() function with the libxlsxwriter
* library. Note, this function is only currently available if you are
* subscribed to the Microsoft Office Beta Channel program.
* library.
*
* Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
*
@ -14,15 +13,11 @@ int main() {
lxw_workbook *workbook = workbook_new("lambda.xlsx");
lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
worksheet_write_string(worksheet, 0, 0,
"Note: Lambda functions currently only work with "
"the Beta Channel versions of Excel 365", NULL);
/* Note that the formula name is prefixed with "_xlfn." and that the
* lambda function parameters are prefixed with "_xlpm.". These prefixes
* won't show up in Excel.
*/
worksheet_write_dynamic_formula(worksheet, CELL("A2"),
worksheet_write_dynamic_formula(worksheet, CELL("A1"),
"=_xlfn.LAMBDA(_xlpm.temp, (5/9) * (_xlpm.temp-32))(32)",
NULL);
@ -31,7 +26,7 @@ int main() {
"ToCelsius",
"=_xlfn.LAMBDA(_xlpm.temp, (5/9) * (_xlpm.temp-32))");
worksheet_write_dynamic_formula(worksheet, CELL("A3"), "=ToCelsius(212)", NULL);
worksheet_write_dynamic_formula(worksheet, CELL("A2"), "=ToCelsius(212)", NULL);
workbook_close(workbook);