I need apply a variable sequence of templates to an argument. The template secuence is determined in runtime in the controller layer, and these templates are applied to only one argument like:
arg:tpl1():tpl2():...:tplN()
In resume, I need apply a serie of templates to an argument, but this sequence calculated in runtime and in the controller layer.
Thank you!!
You need to iterate over the template name and the parameter lists at the same time. From the documentation, http://www.antlr.org/wiki/display/ST4/Templates, you will find this example:
<names,phones:{ n,p | <n>: <p>}>
In your case, you need something like
<names,values:{ n,v | <(n)(v)>}>
Oh, per your comment, to apply a list of templates to another list requires a nested map-apply I think.
<values:{v | <names:{n | <(n)(v)>}}>
That applies each template named in names to each value in values.
Related
As far as I understand, it is not possible in Appian to dynamically construct (process) variable names, just like you would do e.g. with bash using backticks like MY_OBJECT=pv!MY_CONS_`extract(valueOfPulldown)`. Is that correct? Is there a workaround?
I have set of Appian constants, let's call them MY_CONS_FOO, MY_CONS_BAR, MY_CONS_LALA, all of which are e.g. refering to an Appian data store entity. I would like to write an Appian expression rule which populates another variable MY_OBJECT of the same type (here: data store entity), depending e.g. of the options of a pull-down menu having the possible options stored in an array MY_CONS_OPTIONS looking as follows
FOO
BAR
LALA
I could of course build a lengthy case-structure which I have to maintain in addition to MY_CONS_OPTIONS, so I am searching for a more dynanmic approach using the extract() function depending on valueOfPulldown as the chosen value of the pulldown-menu.
Edit: Here the expression-rule (in pseudo-code) I want to avoid:
if (valueOfPulldown = 'FOO') then MY_OBJECT=pv!MY_CONS_FOO
if (valueOfPulldown = 'BAR') then MY_OBJECT=pv!MY_CONS_BAR
if (valueOfPulldown = 'LALA') then MY_OBJECT=pv!MY_CONS_LALA
The goal is to be able to change the data store entity via pulldown-menu.
This can help you find what is behind your constant.
fn!typeName(fn!typeOf(cons!YOUR_CONSTANT)).
Having in mind additional details I would do as follows:
Create separate expression that will combine details into list of Dictionary like below:
Expression results (er):
{
{dd_label: "label1", dd_value: 1, cons: "cons!YOUR_CONSTANT1" }
,{dd_label: "label2", dd_value: 2, cons: "cons!YOUR_CONSTANT2" }
}
on UI for your dropdown control use er.dd_label as choiceLabels and er.dd_value as choiceValues
when user selects value on Dropdown save dropdown value to some local variable and then use it to find your const by doing:
property( index(er, wherecontains(local!dropdownselectedvalue, tointeger(er.dd_value))), "cons")
returned value of step 3 is your constant
This might not be perfect as you still have to maintain your dictionary but you can avoid long if...else statements.
As a alternative have a look on Decisions Tables in Appian https://docs.appian.com/suite/help/21.1/Appian_Decisions.html
There exist any way in Vue.js to make a sum between two interpolation values inside an html tag?
ex:
value1= 5
value2= 3
<span> {{value1}} + {{value2}}</span>
So I would like to know if its posible to obtain a third value rendered on the span tag adding the two values.
<span>{{value1 + value2}}</span>
I see no reason to manipulate data with operations on the template in this case.
The best (and simple) way, probably is to sum that values in your js code and render the result at template as another data property.
Although there is a Vue magic trick that allows you to made that.
It is called Computed Properties. Where you will be 'listening' some dependent data to create another data.
I totally recomend that you read Computed Properties documentation and see how it works
Here is the link:
https://v2.vuejs.org/v2/guide/computed.html
:)
Inside the {{}} you can run any JS really, so you should make a method that handles adding the 2 variables and inside that method it can check that both are numbers and handle converting strings if needed. Or you could try to turn this logic into a computed property.
We had the following code to retrieve data of type TYPE through a model, which is a custom proxy model. This is required by the next QSortFilterProxyModel to make the decision about filtering of elements. The code is actually combined from 2 functions: in the project we usually have some arbitrary index related to some ROW and use it to retrive the data from another predefined column which contains TYPE data.
QModelIndex index = sourceModel()->index(row, COLUMN1, sourceParent); /* sourceParent is always'invalid' - retrieving data from top-level items*/
ModelIndex sibling = index.sibling(row, COLUMN2);
return sibling.data(Qt::EditRole).value<TYPE>();
This worked fine with Qt4 but when moved to Qt5 sibling became 'invalid'. I wonder what has happened, taking into account that the data is actually there, which I see, by changing the code to the following
return sourceModel()->index(sourceRow, COLUMN2, sourceParent).data(Qt::EditRole).value<TYPE>();
-works fine
Looking at the implementation of sibling(), I cannot tell what makes it return an invalid index in your case. Comparing with the Qt4 implementation, maybe it's around the IndexMap use.
But why don't you simply use your solution with sourceModel()->index(sourceRow, COLUMN2, sourceParent), since it already seems to be what you actually want to do?
Did someone know what have I to do, to make a possible search products by price range? I know, that Block Layered can filter by it, but it only works in specified category.
You would have to:
1) Add extra input fields next to search box: from and to. The fields must be inside the form element. You can do this by overriding blocksearch.tpl in your theme.
2) Next, you should make override for classes/Search.php, method find(). You should modify SQL queries at line 252 (PS 1.6.0.11). Use Tools::getValue('from') to add extra SQL WHERE statement.
In LaTeX, how can I define a string variable whose content is used instead of the variable in the compiled PDF?
Let's say I'm writing a tech doc on a software and I want to define the package name in the preamble or somewhere so that if its name changes, I don't have to replace it in a lot of places but only in one place.
add the following to you preamble:
\newcommand{\newCommandName}{text to insert}
Then you can just use \newCommandName{} in the text
For more info on \newcommand, see e.g. wikibooks
Example:
\documentclass{article}
\newcommand\x{30}
\begin{document}
\x
\end{document}
Output:
30
Use \def command:
\def \variable {Something that's better to use as a variable}
Be aware that \def overrides preexisting macros without any warnings and therefore can cause various subtle errors. To overcome this either use namespaced variables like my_var or fall back to \newcommand, \renewcommand commands instead.
For variables describing distances, you would use \newlength (and manipulate the values with \setlength, \addlength, \settoheight, \settolength and \settodepth).
Similarly you have access to \newcounter for things like section and figure numbers which should increment throughout the document. I've used this one in the past to provide code samples that were numbered separatly of other figures...
Also of note is \makebox which allows you to store a bit of laid-out document for later re-use (and for use with \settolength...).
If you want to use \newcommand, you can also include \usepackage{xspace} and define command by \newcommand{\newCommandName}{text to insert\xspace}.
This can allow you to just use \newCommandName rather than \newCommandName{}.
For more detail, http://www.math.tamu.edu/~harold.boas/courses/math696/why-macros.html
I think you probably want to use a token list for this purpose:
to set up the token list
\newtoks\packagename
to assign the name:
\packagename={New Name for the package}
to put the name into your output:
\the\packagename.