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author | fragosti <francesco.agosti93@gmail.com> | 2018-10-27 02:41:09 +0800 |
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committer | fragosti <francesco.agosti93@gmail.com> | 2018-10-27 02:41:09 +0800 |
commit | a414dc9b83c14b277af90ce8397db3736a51a4d3 (patch) | |
tree | e9814de850892932b539c88e1798d44b00db563a /packages/instant/src/util/big_number_input.ts | |
parent | 951a5271e15cebb010281de3b8cbfb3972ecec83 (diff) | |
parent | 0f6307169604f36b0316f236eb96d6001b788f50 (diff) | |
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Merge branch 'development' of https://github.com/0xProject/0x-monorepo into feature/instant/fixed-orders-in-render-method
Diffstat (limited to 'packages/instant/src/util/big_number_input.ts')
-rw-r--r-- | packages/instant/src/util/big_number_input.ts | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/packages/instant/src/util/big_number_input.ts b/packages/instant/src/util/big_number_input.ts new file mode 100644 index 000000000..d2a9a8dc5 --- /dev/null +++ b/packages/instant/src/util/big_number_input.ts @@ -0,0 +1,29 @@ +import { BigNumber } from '@0x/utils'; +import * as _ from 'lodash'; + +/** + * A BigNumber extension that is more flexible about decimal strings. + * Such as allowing: + * new BigNumberInput('0.') => 0 + * new BigNumberInput('1.') => 1 + * new BigNumberInput('1..') => still throws + */ +export class BigNumberInput extends BigNumber { + private readonly _isEndingWithDecimal: boolean; + constructor(bigNumberString: string) { + const hasDecimalPeriod = _.endsWith(bigNumberString, '.'); + let internalString = bigNumberString; + if (hasDecimalPeriod) { + internalString = bigNumberString.slice(0, -1); + } + super(internalString); + this._isEndingWithDecimal = hasDecimalPeriod; + } + public toDisplayString(): string { + const internalString = super.toString(); + if (this._isEndingWithDecimal) { + return `${internalString}.`; + } + return internalString; + } +} |