Dplvar

Manual

dplvar

Syntax

• Sets one symbolic variable name and assign a value:

{{#dplvar:set|varname|valueofvar}}

• Sets multiple symbolic variable names and assigns values to them (one after the other):

{{#dplvar:set|name1|value1|name2|value2|..|..}}

• Assigns a value only if the variable is empty / has not been used so far:

{{#dplvar:default|name|value}}

• Returns the current value of the variable:

{{#dplvar:name}}

Note: Variables can be set and retrieved from an article, or from templates used in that article.

Example 1

Part 1:

This sets a variable, names it "varName", and then assigns the value "My Value" to it.
Note: The result is empty because setting a variable simply assigns a value, it doesn't also display that variable.

{{#dplvar:set|varName|My Value}}

Part 1 Result:

---

Part 2:

This displays the (already set above) value of the variable called "varName".

{{#dplvar:varName}}

Test in sandbox

View Result

Part 2 Result:

My Value

Example 2

Example:

This invokes the {{dplvarUpdate}} template, which initially sets a variable called varName and assigns it the value My Value using:{{#dplvar:set|varName|My Value}}. It later evaluates whether the first parameter is empty or not and if empty returns n/a. If not empty, it gives the revised value My Value2.

{{dplvarUpdate|true}}

Test in sandbox

View Result

Result:

• The initial value of {{#dplvar:varName}} is: My Value
• If the first param is not empty {{#dplvar:varName}} is: My Value2

Example 3

Example:

The first line's statements set the variables initially as: a to x, b to y, and c to <!--empty-->; then the following variables also have a default set: a to aaaa, c to cccc, and d to dddd.

The last four lines display the value of each corresponding variable in a bulleted list format.

{{#dplvar:set|a|x|b|y|c|<!--empty-->}} {{#dplvar:default|a|aaaa}} {{#dplvar:default|c|cccc}} {{#dplvar:default|d|dddd}}
* a: {{#dplvar:a}}
* b: {{#dplvar:b}}
* c: {{#dplvar:c}}
* d: {{#dplvar:d}}

Test in sandbox

View Result

Result:

• a: x
• b: y
• c: cccc
• d: dddd

Notes:

• Variable "c" was set to "cccc" because although it was already set, its note is equivalent to an empty value.
• Variable "d" was set to "dddd" because it was not already set.