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https://github.com/gohugoio/hugo.git
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parent
558c09305e
commit
991934497e
4 changed files with 60 additions and 1 deletions
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@ -38,4 +38,4 @@ aliases: []
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| `math.Round` | Returns the nearest integer, rounding half away from zero. | `{{math.Round 1.5}}` → `2` |
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| `math.Log` | Returns the natural logarithm of the given number. | `{{math.Log 42}}` → `3.737` |
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| `math.Sqrt` | Returns the square root of the given number. | `{{math.Sqrt 81}}` → `9` |
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| `math.Pow` | Returns the first number raised to the power of the second number. | `{{math.Pow 2 3}}` → `8` |
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@ -92,6 +92,13 @@ func init() {
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},
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)
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ns.AddMethodMapping(ctx.Pow,
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[]string{"pow"},
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[][2]string{
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{"{{math.Pow 2 3}}", "8"},
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},
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)
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ns.AddMethodMapping(ctx.Round,
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nil,
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[][2]string{
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@ -115,6 +115,18 @@ func (ns *Namespace) Mul(a, b interface{}) (interface{}, error) {
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return _math.DoArithmetic(a, b, '*')
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}
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// Pow returns a raised to the power of b.
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func (ns *Namespace) Pow(a, b interface{}) (float64, error) {
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af, erra := cast.ToFloat64E(a)
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bf, errb := cast.ToFloat64E(b)
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if erra != nil || errb != nil {
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return 0, errors.New("Pow operator can't be used with non-float value")
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}
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return math.Pow(af, bf), nil
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}
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// Round returns the nearest integer, rounding half away from zero.
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func (ns *Namespace) Round(x interface{}) (float64, error) {
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xf, err := cast.ToFloat64E(x)
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@ -318,3 +318,43 @@ func TestRound(t *testing.T) {
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c.Assert(result, qt.Equals, test.expect)
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}
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}
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func TestPow(t *testing.T) {
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t.Parallel()
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c := qt.New(t)
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ns := New()
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for _, test := range []struct {
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a interface{}
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b interface{}
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expect interface{}
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}{
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{0, 0, float64(1)},
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{2, 0, float64(1)},
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{2, 3, float64(8)},
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{-2, 3, float64(-8)},
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{2, -3, float64(0.125)},
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{-2, -3, float64(-0.125)},
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{0.2, 3, float64(0.008)},
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{2, 0.3, float64(1.2311)},
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{0.2, 0.3, float64(0.617)},
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{"aaa", "3", false},
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{"2", "aaa", false},
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} {
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result, err := ns.Pow(test.a, test.b)
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if b, ok := test.expect.(bool); ok && !b {
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c.Assert(err, qt.Not(qt.IsNil))
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continue
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}
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// we compare only 4 digits behind point if its a real float
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// otherwise we usually get different float values on the last positions
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result = float64(int(result*10000)) / 10000
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c.Assert(err, qt.IsNil)
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c.Assert(result, qt.Equals, test.expect)
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}
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}
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