Loogle!

Result

Found 5 declarations mentioning Std.DHashMap.Internal.AssocList.map.

• Std.DHashMap.Internal.AssocList.map 📋 Std.Data.DHashMap.Internal.AssocList.Basic
  {α : Type u} {β : α → Type v} {γ : α → Type w} (f : (a : α) → β a → γ a) : Std.DHashMap.Internal.AssocList α β → Std.DHashMap.Internal.AssocList α γ
• Std.DHashMap.Internal.AssocList.map.eq_1 📋 Std.Data.DHashMap.Internal.AssocList.Lemmas
  {α : Type u} {β : α → Type v} {γ : α → Type w} (f : (a : α) → β a → γ a) : Std.DHashMap.Internal.AssocList.map f = Std.DHashMap.Internal.AssocList.map.go f Std.DHashMap.Internal.AssocList.nil
• Std.DHashMap.Internal.AssocList.filterMap_eq_map 📋 Std.Data.DHashMap.Internal.AssocList.Lemmas
  {α : Type u} {β : α → Type v} {γ : α → Type w} {f : (a : α) → β a → γ a} {l : Std.DHashMap.Internal.AssocList α β} : Std.DHashMap.Internal.AssocList.filterMap (fun k v => some (f k v)) l = Std.DHashMap.Internal.AssocList.map f l
• Std.DHashMap.Internal.AssocList.toList_map 📋 Std.Data.DHashMap.Internal.AssocList.Lemmas
  {α : Type u} {β : α → Type v} {γ : α → Type w} {f : (a : α) → β a → γ a} {l : Std.DHashMap.Internal.AssocList α β} : (Std.DHashMap.Internal.AssocList.map f l).toList.Perm (List.map (fun p => ⟨p.fst, f p.fst p.snd⟩) l.toList)
• Std.DHashMap.Internal.Raw₀.mapₘ.eq_1 📋 Std.Data.DHashMap.Internal.WF
  {α : Type u} {β : α → Type v} {δ : α → Type w} (m : Std.DHashMap.Internal.Raw₀ α β) (f : (a : α) → β a → δ a) : m.mapₘ f = ⟨{ size := (↑m).size, buckets := Std.DHashMap.Internal.updateAllBuckets (↑m).buckets (Std.DHashMap.Internal.AssocList.map f) }, ⋯⟩

About

Loogle searches Lean and Mathlib definitions and theorems.

You can use Loogle from within the Lean4 VSCode language extension using (by default) Ctrl-K Ctrl-S. You can also try the #loogle command from LeanSearchClient, the CLI version, the Loogle VS Code extension, the lean.nvim integration or the Zulip bot.

Usage

Loogle finds definitions and lemmas in various ways:

1. By constant:
   🔍 Real.sin
   finds all lemmas whose statement somehow mentions the sine function.

2. By lemma name substring:
   🔍 "differ"
   finds all lemmas that have "differ" somewhere in their lemma name.

3. By subexpression:
   🔍 _ * (_ ^ _)
   finds all lemmas whose statements somewhere include a product where the second argument is raised to some power.

   The pattern can also be non-linear, as in
   🔍 Real.sqrt ?a * Real.sqrt ?a

   If the pattern has parameters, they are matched in any order. Both of these will find List.map:
   🔍 (?a -> ?b) -> List ?a -> List ?b
   🔍 List ?a -> (?a -> ?b) -> List ?b

4. By main conclusion:
   🔍 |- tsum _ = _ * tsum _
   finds all lemmas where the conclusion (the subexpression to the right of all → and ∀) has the given shape.

   As before, if the pattern has parameters, they are matched against the hypotheses of the lemma in any order; for example,
   🔍 |- _ < _ → tsum _ < tsum _
   will find tsum_lt_tsum even though the hypothesis f i < g i is not the last.

If you pass more than one such search filter, separated by commas Loogle will return lemmas which match all of them. The search
🔍 Real.sin, "two", tsum, _ * _, _ ^ _, |- _ < _ → _
would find all lemmas which mention the constants Real.sin and tsum, have "two" as a substring of the lemma name, include a product and a power somewhere in the type, and have a hypothesis of the form _ < _ (if there were any such lemmas). Metavariables (?a) are assigned independently in each filter.

The #lucky button will directly send you to the documentation of the first hit.

Source code

You can find the source code for this service at https://github.com/nomeata/loogle. The https://loogle.lean-lang.org/ service is provided by the Lean FRO.

This is Loogle revision 19971e9 serving mathlib revision bce1d65