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c4b142ea68
* Simplifies community banner and adds style property * Add animation for communities banner card * Moves value-in-range to `utils.number` and removes `bounded-val` * Moves animated values to view namespace * Make `community.banner` component themeable
32 lines
998 B
Clojure
32 lines
998 B
Clojure
(ns utils.number)
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(defn naive-round
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"Quickly and naively round number `n` up to `decimal-places`.
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Example usage: use it to avoid re-renders caused by floating-point number
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changes in Reagent atoms. Such numbers can be rounded up to a certain number
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of `decimal-places` in order to avoid re-rendering due to tiny fractional
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changes.
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Don't use this function for arbitrary-precision arithmetic."
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[n decimal-places]
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(let [scale (Math/pow 10 decimal-places)]
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(/ (Math/round (* n scale))
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scale)))
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(defn parse-int
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"Parses `n` as an integer. Defaults to zero or `default` instead of NaN."
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([n]
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(parse-int n 0))
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([n default]
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(let [maybe-int (js/parseInt n 10)]
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(if (integer? maybe-int)
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maybe-int
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default))))
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(defn value-in-range
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"Returns `num` if is in the range [`lower-bound` `upper-bound`]
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if `num` exceeds a given bound, then returns the bound exceeded."
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[number lower-bound upper-bound]
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(max lower-bound (min number upper-bound)))
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