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Copy a template section into a test-page edit-window, for debug. Copy a template section to the top of the template, for debug. Restructure a template so that each section is more separated. The basic strategy: isolate the code section to be debugged. Next, the testing, of each section of code, is crucial. There are some age-old adages to heed:
Navigation templates are particularly useful for a small, well-defined group of articles; templates with a large number of links are not forbidden, but can appear overly busy and be hard to read and use. Good navboxes generally follow most or all of these guidelines: All articles within a template relate to a single, coherent subject.
Stage 1: the bootstrap compiler is produced. This compiler is enough to translate its own source into a program which can be executed on the target machine. At this point, all further development is done using the language defined by the bootstrap compiler, and stage 2 begins. Stage 2: a full compiler is produced by the bootstrap compiler.
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The difference appears when a template is transcluded instead of substituted; in such a case, subst: templates will print text as-is, without evaluating, while safesubst: templates will transclude. Substitution will reevaluate when the resulting template is included, unlike transclusion. This makes it useful for macro templating.
The term "meta-templates", as used in this article, refers to nested templates which are created and used to add functions or formatting to other templates. While they can be extremely useful and convenient, it is proposed that they be avoided due to concerns that may not be immediately obvious: Meta-template schemes can be fragile and hard for ...
This essay covers issues about the MediaWiki version 1.16 "expansion depth limit" for the nesting of templates and if-logic. All during 2009-2016, the nesting limit has been only a mere 40 levels of nested if-then-else (or nested templates) invoked inside other templates (it was later set to 100 levels in 2021).
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