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Showing content from https://github.com/StefH/Handlebars.Net.Helpers/wiki/Enumerable below:

Enumerable · Handlebars-Net/Handlebars.Net.Helpers Wiki · GitHub

Custom Enumerable Block Helpers

These block helpers allow for some simple selecting, querying, filtering on arrays, lists and collections.

Enumerable.Average
Enumerable.Count
Enumerable.Distinct
Enumerable.IsEmpty
Enumerable.IsFirst
Enumerable.IsLast
Enumerable.Max
Enumerable.Min
Enumerable.Page
Enumerable.Reverse
Enumerable.Select
Enumerable.Skip
Enumerable.Sum
Enumerable.Take

Summary Return a collection of distinct elements from an array Returns Updated collection of distinct elements Remarks If object is not an array, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) Parameters array Array of objects to make distinct

Context

{
    "array": [
        "one",
        "two",
        "two",
        "two",
        "three"
    ],
    "badInput": {
        "something": true
    }
}

Usage

<strong>result:</strong>
{{#Enumerable.Distinct array}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Distinct}}

{{#Enumerable.Distinct badInput}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Distinct}}

Returns

<strong>result:</strong>
<strong>True</strong>
<ul>
    <li>Value: one</li>
    <li>Value: two</li>
    <li>Value: three</li>
</ul>

<strong>False</strong>

Summary Determine whether or not the object passed in is the first element in the passed in array Returns Whether or not the object is the first element in the array Remarks Parameters array Array of objects to inspect object Object to match on

Context

{
    "array": [
        "one",
        "two",
        "three"
    ]
}

Usage

<strong>result:</strong>
{{#Enumerable.IsFirst array "one"}}
    <strong>True</strong>
{{else}}
    <strong>False</strong>
{{/IsFirst}}

{{#Enumerable.IsFirst array "two"}}
    <strong>True</strong>
{{else}}
    <strong>False</strong>
{{/IsFirst}}

Returns

<strong>result:</strong>
<strong>True</strong>

<strong>False</strong>

Summary Determine whether or not the object passed in is the last element in the passed in array Returns Whether or not the object is the last element in the array Remarks Parameters array Array of objects to inspect object Object to match on

Context

{
    "array": [
        "one",
        "two",
        "three"
    ]
}

Usage

<strong>result:</strong>
{{#Enumerable.IsLast array "one"}}
    <strong>True</strong>
{{else}}
    <strong>False</strong>
{{/IsLast}}

{{#Enumerable.IsLast array "three"}}
    <strong>True</strong>
{{else}}
    <strong>False</strong>
{{/IsLast}}

Returns

<strong>result:</strong>
<strong>False</strong>

<strong>True</strong>

Summary Return a collection of elements from an array, skipping N elements Returns A single page worth of elements Remarks If object is not an array, if page number is not passed in, or if page number or countPerPage are <= 0, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) Parameters array Array of objects to evaluate pageNumber Page number countPerPage Number of elements per page, default 0

Context

{
    "array": [
        "one",
        "two",
        "three",
        "four",
        "five"
    ],
    "badInput": {
        "something": true
    }
}

Usage

<strong>result:</strong>
{{#Enumerable.Page array 2 2}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Page}}

{{#Enumerable.Page badInput 1 3}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Page}}

{{#Enumerable.Page array 1 -1}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Page}}

{{#Enumerable.Page array 0 2}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Page}}

Returns

<strong>result:</strong>
<strong>True</strong>
<ul>
    <li>Value: three</li>
    <li>Value: four</li>
</ul>

<strong>False</strong>

<strong>False</strong>

<strong>False</strong>

Summary Reverses the order of an array Returns An array with the element order reversed Remarks If object is not an array, if page number is not passed in, or if page number or countPerPage are <= 0, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) Parameters input Array of elements to reverse

Context

{
    "array": [
        "one",
        "two",
        "three",
        "four",
        "five"
    ],
    "badInput": {
        "something": true
    }
}

Usage

<strong>Result:</strong>
{{#Enumerable.Reverse array}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Reverse}}

<strong>Input Not an Array Result:</strong>
{{#Enumerable.Reverse badInput}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Reverse}}

Returns

<strong>Result:</strong>
<strong>True</strong>
<ul>
    <li>Value: five</li>
    <li>Value: four</li>
    <li>Value: three</li>
    <li>Value: two</li>
    <li>Value: one</li>
</ul>

<strong>Input Not an Array Result:</strong>
<strong>False</strong>

Summary Return a collection of properties from an array Returns Updated collection of elements Remarks If input is not an array, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) If property is not found, this will return an empty array Parameters input Array of objects to search property Property to match on

Context

{
    "array": [
        {
            "id": 1,
            "name": "test1",
            "type": {
                "id": 5,
                "name": "type1"
            }
        },
        {
            "id": 2,
            "name": "test2",
            "type": {
                "id": 5,
                "name": "type1",
                "color": "blue"
            }
        },
        {
            "id": 3,
            "name": "test2",
            "type": {
                "id": 6,
                "name": "type2",
                "color": "red"
            }
        },
        {
            "id": 4,
            "name": "test3",
            "type": {
                "id": 7,
                "name": "type3",
                "color": "red"
            }
        }
    ],
    "notArray": {
        "id": 1
    }
}

Usage

<strong>Direct Property:</strong>
{{#Enumerable.Select array "name"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

<strong>Object Property:</strong>
{{#Enumerable.Select array "type"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this.id}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

<strong>Nested Property:</strong>
{{#Enumerable.Select array "type.name"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

<strong>Property Exists in Some Elements:</strong>
{{#Enumerable.Select array "type.color"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

<strong>Property Doesen't Exist:</strong>
{{#Enumerable.Select array "doesnotexist"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

<strong>Input Not an Array:</strong>
{{#Enumerable.Select notArray "id"}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Select}}

Returns

<strong>Direct Property:</strong>
<strong>True</strong>
<ul>
    <li>Value: test1</li>
    <li>Value: test2</li>
    <li>Value: test2</li>
    <li>Value: test3</li>
</ul>

<strong>Object Property:</strong>
<strong>True</strong>
<ul>
    <li>Value: 5</li>
    <li>Value: 5</li>
    <li>Value: 6</li>
    <li>Value: 7</li>
</ul>

<strong>Nested Property:</strong>
<strong>True</strong>
<ul>
    <li>Value: type1</li>
    <li>Value: type1</li>
    <li>Value: type2</li>
    <li>Value: type3</li>
</ul>

<strong>Property Exists in Some Elements:</strong>
<strong>True</strong>
<ul>
    <li>Value: blue</li>
    <li>Value: red</li>
    <li>Value: red</li>
</ul>

<strong>Property Doesen't Exist:</strong>
<strong>True</strong>
<ul>
</ul>

<strong>Input Not an Array:</strong>
<strong>False</strong>

Summary Return a collection of elements from an array, skipping N elements Returns Collection of elements, minus the ones that were skipped Remarks If object is not an array, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) Parameters array Array of objects to evaluate skipN Number of elements to skip

Context

{
    "array": [
        "one",
        "two",
        "three"
    ],
    "badInput": {
        "something": true
    }
}

Usage

<strong>result:</strong>
{{#Enumerable.Skip array 2}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Skip}}

{{#Enumerable.Skip badInput 1}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Skip}}

Returns

<strong>result:</strong>
<strong>True</strong>
<ul>
    <li>Value: three</li>
</ul>

<strong>False</strong>

Summary Return a collection of N elements from an array Returns Collection of N elements Remarks If object is not an array, this will drop into the else block. Note: this can be used with an array of maps/objects, it does not need to be an array of simple types(string, numeric, bool, etc..) Parameters array Array of objects to evaluate takeN Number of elements to return

Context

{
    "array": [
        "one",
        "two",
        "three"
    ],
    "badInput": {
        "something": true
    }
}

Usage

<strong>result:</strong>
{{#Enumerable.Take array 2}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Take}}

{{#Enumerable.Take badInput 1}}
    <strong>True</strong>
    <ul>
    {{#each this}}
        <li>Value: {{this}}</li>
    {{/each}}
    </ul>
{{else}}
    <strong>False</strong>
{{/Take}}

Returns

<strong>result:</strong>
<strong>True</strong>
<ul>
    <li>Value: one</li>
    <li>Value: two</li>
</ul>

<strong>False</strong>

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