lua | The official version of Lua

Looks like there was a change in rmarkdown which adds a colon by default. Also the reason why the answer in the linked post does not work anymore. For more on this and a solution see https://community.rstudio.com/t/how-to-change-the-figure-table-caption-style-in-bookdown/110397.

Besides the solution offered there you could achieve your desired result by replacing the colon by a dot. Adapting the lua filter provided by https://stackoverflow.com/a/59301855/12993861 this could done like so:

You can use string.gmatch(s, pattern) / s:gmatch(pattern):

This returns a pattern finding iterator. The iterator will search through the string passed looking for instances of the pattern you passed.

See the online Lua demo:

In C++, the standard way to make an associative table is std::map:

I've been looking into this myself for the same reasons and from I can gather you need to use log4j-1.2-api-2.15.0.jar based on the following read:

Perhaps the simplest way to convert to using Log4j 2 is to replace the log4j 1.x jar file with Log4j 2's log4j-1.2-api.jar.

source

I would like to point out that this shouldn't be the accepted answer but I wanted to give an answer for those who are trying to grasp the situation.

[Edit]

It would seem that log4j-1.2-api-2.15.0.jar is not enough. It helps with migrating Geoserver to the newer log4j version whilst still using the previous main package but it fails to reference to the newer version. As such I also added log4j-api-2.15.0.jar to the mix to complete the pathing.

After this it seems to work again and the version has been updated. I could validate this by using the api of Geoserver (/geoserver/rest/about/manifest.xml) specifically. If you search for log4j before upgrading you'll see 1.2.17 and afterwards 2.15.

In your first attempt you are not adding new fields to the table chain so the method __newindex is never called, in your second attempt, I don't know what you did wrong because it worked to me, I did:

Depending on how you structure your code, you could simply return.

No, because "false" will also evaluate to true, so if you want "false" to evaluate to false, you will have to convert it manually.

When Lua calls your function it will check its return value to find out how many values it should fetch from the stack. In your case that's 1. How else would Lua know how many of the pushed values you want to return?

From Lua 5.4 Reference Manual 4.6 Functions and Types:

In order to communicate properly with Lua, a C function must use the following protocol, which defines the way parameters and results are passed: a C function receives its arguments from Lua in its stack in direct order (the first argument is pushed first). So, when the function starts, lua_gettop(L) returns the number of arguments received by the function. The first argument (if any) is at index 1 and its last argument is at index lua_gettop(L). To return values to Lua, a C function just pushes them onto the stack, in direct order (the first result is pushed first), and returns in C the number of results. Any other value in the stack below the results will be properly discarded by Lua. Like a Lua function, a C function called by Lua can also return many results.

As an example, the following function receives a variable number of numeric arguments and returns their average and their sum:

You can use luaparser (pip install luaparser) with recursion to traverse the ast: