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--- | ||
title: images.AutoOrient | ||
description: Returns an image filter that rotates and flips an image as needed per its EXIF orientation tag. | ||
categories: [] | ||
keywords: [] | ||
action: | ||
aliases: [] | ||
related: | ||
- functions/images/Filter | ||
- methods/resource/Filter | ||
returnType: images.filter | ||
signatures: [images.AutoOrient] | ||
toc: true | ||
--- | ||
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{{< new-in 0.122.0 >}} | ||
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## Usage | ||
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Create the filter: | ||
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```go-html-template | ||
{{ $filter := images.AutoOrient }} | ||
``` | ||
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{{% include "functions/images/_common/apply-image-filter.md" %}} | ||
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{{% note %}} | ||
When using with other filters, specify `images.AutoOrient` first. | ||
{{% /note %}} | ||
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```go-html-template | ||
{{ $filters := slice | ||
images.AutoOrient | ||
(images.Process "resize 200x") | ||
}} | ||
{{ with resources.Get "images/original.jpg" }} | ||
{{ with images.Filter $filters . }} | ||
<img src="{{ .RelPermalink }}" width="{{ .Width }}" height="{{ .Height }}" alt=""> | ||
{{ end }} | ||
{{ end }} | ||
``` | ||
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## Example | ||
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{{< img | ||
src="images/examples/landscape-exif-orientation-5.jpg" | ||
alt="Zion National Park" | ||
filter="AutoOrient" | ||
filterArgs="" | ||
example=true | ||
>}} |
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--- | ||
title: math.Rand | ||
description: Returns a pseudo-random number in the half-open interval [0.0, 1.0). | ||
categories: [] | ||
keywords: [] | ||
action: | ||
aliases: [] | ||
related: [] | ||
returnType: float64 | ||
signatures: [math.Rand] | ||
--- | ||
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The `math.Rand` function returns a pseudo-random number in the [half-open interval] [0.0, 1.0). | ||
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```go-html-template | ||
{{ math.Rand }} → 0.6312770459590062 | ||
``` | ||
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To generate a random integer in the [closed interval] [0, 5]: | ||
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```go-html-template | ||
{{ math.Rand | mul 6 | math.Floor }} | ||
``` | ||
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To generate a random integer in the closed interval [1, 6]: | ||
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```go-html-template | ||
{{ math.Rand | mul 6 | math.Ceil }} | ||
``` | ||
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To generate a random float, with one digit after the decimal point, in the closed interval [0, 4.9]: | ||
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```go-html-template | ||
{{ div (math.Rand | mul 50 | math.Floor) 10 }} | ||
``` | ||
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To generate a random float, with one digit after the decimal point, in the closed interval [0.1, 5.0]: | ||
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```go-html-template | ||
{{ div (math.Rand | mul 50 | math.Ceil) 10 }} | ||
``` | ||
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[closed interval]: /getting-started/glossary/#interval | ||
[half-open interval]: /getting-started/glossary/#interval |