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Diffstat (limited to 'lib/utils.coffee')
| -rw-r--r-- | lib/utils.coffee | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/utils.coffee b/lib/utils.coffee index 9969811a..31f4bec6 100644 --- a/lib/utils.coffee +++ b/lib/utils.coffee @@ -236,6 +236,10 @@ Utils = # Like Nodejs's nextTick. nextTick: (func) -> @setTimeout 0, func + # Make an idempotent function. + makeIdempotent: (func) -> + (args...) -> ([previousFunc, func] = [func, null])[0]? args... + # Utility for parsing and using the custom search-engine configuration. We re-use the previous parse if the # search-engine configuration is unchanged. SearchEngines = |