add toPrecision() about break_infinity.js HOT 5 CLOSED

Looks like toPrecision() is like toFixed() while sigFigs is greater than the exponent, and like toExponent() otherwise?

new Decimal(1e11).toPrecision(11)

"1.0000000000e+11"

new Decimal(1e10).toPrecision(11)

"10000000000"

Lemme try that...

from break_infinity.js.

Added, should work the same as decimal.js

from break_infinity.js.

Found a weirdness with toPrecision() on very small numbers.

decimal.js:

new Decimal(1e-6).toPrecision(1)
"0.000001"
new Decimal(1e-7).toPrecision(1)
"1e-7"
new Decimal(1e-300).toPrecision(1)
"1e-300"
new Decimal(1e-300).toPrecision(2)
"1.0e-300"
new Decimal(1e-300).toPrecision(3)
"1.00e-300"
new Decimal(1e-999).toPrecision(1)
"0"
new Decimal(1e-999).toPrecision(2)
"0.0"
new Decimal(1e-999).toPrecision(3)
"0.00"

break_infinity.js:

Everything 'bigger' than 1e-100 is using toFixed, and there is no swap to exponential notation...

new Decimal(1e-100).toPrecision(1)
"0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"

Until...

new Decimal(1e-101).toPrecision(1)
break_infinity.html:312 Uncaught RangeError: toFixed() digits argument must be between 0 and 100
    at Number.toFixed (<anonymous>)
    at Decimal.toFixed (break_infinity.html:312)
    at Decimal.toPrecision (break_infinity.html:319)
    at <anonymous>:1:21

Everything 'smaller' than 1e-101 also throws the RangeError.

Not sure about the change in Decimal.js from 1e-300 to 1e-999 suddenly not being exponential anymore, but I'll add the swap to exponential notation, which also fixes the RangeError being thrown.

from break_infinity.js.

My tests pass with this, thanks!

No idea about the small number behavior - swarmsim never gets that small, and swarm-numberformat's not really tested for it either. Unsure if you're done with that part, so I'll let you close this.

from break_infinity.js.

I think it's just a weird thing in decimal.js and the behaviour in break_infinity.js is fine so I'll close

from break_infinity.js.