6 examples of 'convert float to int' in Go

78
func convertToIntFloat(v float64, curMaxMult uint8) (float64, uint8, bool, error) {
79
	if curMaxMult == 0 && v < maxInt {
80
		// Quick check for vals that are already ints
81
		i, r := math.Modf(v)
82
		if r == 0 {
83
			return i, 0, false, nil
84
		}
85
	}
86
87
	if curMaxMult > maxMult {
88
		return 0.0, 0, false, errInvalidMultiplier
89
	}
90
91
	val := v * multipliers[int(curMaxMult)]
92
	sign := 1.0
93
	if v < 0 {
94
		sign = -1.0
95
		val = val * -1.0
96
	}
97
98
	for mult := curMaxMult; mult <= maxMult && val < maxOptInt; mult++ {
99
		i, r := math.Modf(val)
100
		if r == 0 {
101
			return sign * i, mult, false, nil
102
		} else if r < 0.1 {
103
			// Round down and check
104
			if math.Nextafter(val, 0) <= i {
105
				return sign * i, mult, false, nil
106
			}
107
		} else if r > 0.9 {
108
			// Round up and check
109
			next := i + 1
110
			if math.Nextafter(val, next) >= next {
111
				return sign * next, mult, false, nil
112
			}
113
		}
114
		val = val * 10.0
115
	}
116
117
	return v, 0, true, nil
118
}

68
func (stdRecipes) float64ToInt32(c Converter, in float64, out *int32) error {
69
	*out = int32(in)
70
	return nil
71
}

8
func StrToFloat(val string) float64 {
9
	if i, err := strconv.ParseFloat(val, 64); err == nil {
10
		return i
11
	}
12
	return 0
13
}

85
func i2int(i interface{}) int {
86
	switch i.(type) {
87
	case string:
88
		val, _ := strconv.ParseFloat(i.(string), 32)
89
		return int(val)
90
	case int:
91
		return i.(int)
92
	case float64:
93
		return int(i.(float64))
94
	}
95
	panic(i)
96
}

40
func ConverFloat(str string) (float64, error) {
41
	args := strings.Split(str, ".")
42
	var newStr string
43
	for k, v := range args {
44
		if k == 0 {
45
			newStr = string(v) + "."
46
		} else {
47
			newStr = newStr + string(v)
48
		}
49
	}
50
	version, err := strconv.ParseFloat(newStr, 64)
51
	return version, err
52
}

60
func IntAsFloat(i *big.Int, decimals int) *big.Float {
61
	f := new(big.Float)
62
	f.SetPrec(100)
63
	f.SetInt(i)
64
	f.Quo(f, big.NewFloat(math.Pow10(decimals)))
65
	return f
66
}