21 lines
1.1 KiB
Markdown
21 lines
1.1 KiB
Markdown
[← Utils](../README.md)
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# Utils/TfI
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O(1) timeframe lookup tables — avoids scattered `switch(ENUM_TIMEFRAMES)` blocks across the codebase.
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## Main features
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- Timeframe → period in seconds, via a precomputed table (`g_mqlarticles_tfi_period_s`).
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- Timeframe → descriptive names (full enum name, short uppercase, short lowercase) (`g_mqlarticles_tfi_desc` / `MqlArticlesTfiDesc`).
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- A hash-based jump table (seeds + final table) for fast lookups instead of linear search (generated via SimPHash).
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## Basic usage
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```mql5
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// Example: Given a timeframe (in this case, the period current as an example; it could be a variable, etc.),
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// you want to quickly convert that variable to a short description "M1"
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// without using EnumToString and StringReplace + To Upper/ToLower. Instead,
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// you use a quick access method with an alg hash (perfect hash), a single click, a mul, a
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// nd a shift... and that's it! You now have an index with which you can query properties.
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const string decs = g_mqlarticles_tfi_desc[MqlArticlesTfiIdx(PERIOD_CURRENT)].full_name;
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Print(decs);
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```
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