41 lines
882 B
Objective-C
41 lines
882 B
Objective-C
//
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// MPProductTerm.m
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// MathKit
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//
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// Created by Kim Wittenburg on 15.11.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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#import "MPProductTerm.h"
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@implementation MPProductTerm
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- (instancetype)initWithFactors:(NSArray *)factors
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{
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self = [super init];
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if (self) {
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NSAssert(factors != nil, @"factors must not be nil.");
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NSAssert(factors.count > 0, @"factors must not be empty.");
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_factors = factors.copy;
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}
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return self;
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}
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- (NSDecimalNumber *)doEvaluation:(NSError *__autoreleasing *)error
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{
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NSDecimalNumber *value = [NSDecimalNumber one];
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for (MPTerm *factor in self.factors) {
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NSDecimalNumber *currentValue = [factor evaluate:error];
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if (!currentValue) {
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return nil;
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}
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value = [value decimalNumberByMultiplyingBy:currentValue];
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}
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return value;
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}
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@end
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