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Editorial: Early return & throw in Number.prototype.to* methods #1938

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May 21, 2020
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Editorial: Early return & throw in Number.prototype.to* methods #1938

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14 changes: 5 additions & 9 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -27210,14 +27210,12 @@ <h1>Number.prototype.toExponential ( _fractionDigits_ )</h1>
1. Let _x_ be ? thisNumberValue(*this* value).
1. Let _f_ be ? ToInteger(_fractionDigits_).
1. Assert: If _fractionDigits_ is *undefined*, then _f_ is 0.
1. If _x_ is *NaN*, return the String *"NaN"*.
1. If _x_ is not finite, return ! Number::toString(_x_).
1. If _f_ &lt; 0 or _f_ &gt; 100, throw a *RangeError* exception.
1. Let _s_ be the empty String.
1. If _x_ &lt; 0, then
1. Set _s_ to *"-"*.
1. Set _x_ to -_x_.
1. If _x_ = *+&infin;*, then
1. Return the string-concatenation of _s_ and *"Infinity"*.
1. If _f_ &lt; 0 or _f_ &gt; 100, throw a *RangeError* exception.
1. If _x_ = 0, then
1. Let _m_ be the String value consisting of _f_ + 1 occurrences of the code unit 0x0030 (DIGIT ZERO).
1. Let _e_ be 0.
Expand Down Expand Up @@ -27262,7 +27260,7 @@ <h1>Number.prototype.toFixed ( _fractionDigits_ )</h1>
1. Let _f_ be ? ToInteger(_fractionDigits_).
1. Assert: If _fractionDigits_ is *undefined*, then _f_ is 0.
1. If _f_ &lt; 0 or _f_ &gt; 100, throw a *RangeError* exception.
1. If _x_ is *NaN*, return the String *"NaN"*.
1. If _x_ is not finite, return ! Number::toString(_x_).
1. Let _s_ be the empty String.
1. If _x_ &lt; 0, then
1. Set _s_ to *"-"*.
Expand Down Expand Up @@ -27304,14 +27302,12 @@ <h1>Number.prototype.toPrecision ( _precision_ )</h1>
1. Let _x_ be ? thisNumberValue(*this* value).
1. If _precision_ is *undefined*, return ! ToString(_x_).
1. Let _p_ be ? ToInteger(_precision_).
1. If _x_ is *NaN*, return the String *"NaN"*.
1. If _x_ is not finite, return ! Number::toString(_x_).
1. If _p_ &lt; 1 or _p_ &gt; 100, throw a *RangeError* exception.
1. Let _s_ be the empty String.
1. If _x_ &lt; 0, then
1. Set _s_ to the code unit 0x002D (HYPHEN-MINUS).
1. Set _x_ to -_x_.
1. If _x_ = *+&infin;*, then
1. Return the string-concatenation of _s_ and *"Infinity"*.
1. If _p_ &lt; 1 or _p_ &gt; 100, throw a *RangeError* exception.
1. If _x_ = 0, then
1. Let _m_ be the String value consisting of _p_ occurrences of the code unit 0x0030 (DIGIT ZERO).
1. Let _e_ be 0.
Expand Down