Open main menu
Home
Random
Donate
Recent changes
Special pages
Community portal
Preferences
About Stockhub
Disclaimers
Search
User menu
Talk
Contributions
Create account
Log in
Editing
Module:Road data/strings/doc
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
===Existence testing=== Another use for tables is existence testing. If a table has the <code>ifexists</code> field set to <code>true</code>, the parser will perform existence testing on the result of parsing the <code>default</code> field. If the test fails, the result of parsing the <code>otherwise</code> field is returned. Existence testing may be chained by using a second ifexists table as the value of the first table's <code>otherwise</code> field, and so on. Here's an example of nested existence testing (from [[Module:Road data/strings/GBR]]): <syntaxhighlight lang="lua"> GBR.B = { shield = { ifexists = true, default = "UK road B%route%.svg", otherwise = { ifexists = true, default = "UK road B%route%.png" } }, link = "", abbr = "B%route%" } </syntaxhighlight>
Summary:
Please note that all contributions to Stockhub may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Stockhub:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)