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author | Mikhail Rakhmanov <[email protected]> | 2020-06-13 07:42:15 +0100 |
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committer | Mikhail Rakhmanov <[email protected]> | 2020-06-13 07:42:15 +0100 |
commit | 16bbf4ab7f132e6e5e5318dccdef9a5d71afdd7f (patch) | |
tree | 4b79fa8c046be56b02427ba843e70cdf3ac05767 /editors/code/src/util.ts | |
parent | eeb8b9e236796da8734ba81a49164864497f7226 (diff) | |
parent | b56ad148db0c69eb279c225f45d324b4e80e7367 (diff) |
Merge branch 'master' into keyword_completion
# Conflicts:
# docs/user/generated_features.adoc
Diffstat (limited to 'editors/code/src/util.ts')
-rw-r--r-- | editors/code/src/util.ts | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/editors/code/src/util.ts b/editors/code/src/util.ts index 352ef9162..fe3fb71cd 100644 --- a/editors/code/src/util.ts +++ b/editors/code/src/util.ts | |||
@@ -99,3 +99,21 @@ export function isValidExecutable(path: string): boolean { | |||
99 | export function setContextValue(key: string, value: any): Thenable<void> { | 99 | export function setContextValue(key: string, value: any): Thenable<void> { |
100 | return vscode.commands.executeCommand('setContext', key, value); | 100 | return vscode.commands.executeCommand('setContext', key, value); |
101 | } | 101 | } |
102 | |||
103 | /** | ||
104 | * Returns a higher-order function that caches the results of invoking the | ||
105 | * underlying function. | ||
106 | */ | ||
107 | export function memoize<Ret, TThis, Param extends string>(func: (this: TThis, arg: Param) => Ret) { | ||
108 | const cache = new Map<string, Ret>(); | ||
109 | |||
110 | return function(this: TThis, arg: Param) { | ||
111 | const cached = cache.get(arg); | ||
112 | if (cached) return cached; | ||
113 | |||
114 | const result = func.call(this, arg); | ||
115 | cache.set(arg, result); | ||
116 | |||
117 | return result; | ||
118 | }; | ||
119 | } | ||