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185 lines (185 loc) · 5.31 KB
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{
"id": "neq",
"summary": "Not equal to comparison",
"description": "Compares whether `x` is **not** strictly equal to `y`.\n\n**Remarks:**\n\n* Data types MUST be checked strictly. For example, a string with the content *1* is not equal to the number *1*. Nevertheless, an integer *1* is equal to a floating-point number *1.0* as `integer` is a sub-type of `number`.\n* If any operand is a no-data value, the result will be the no-data value (or `null`).\n* The comparison of `NaN` (not a number) follows [IEEE Standard 754](https://ieeexplore.ieee.org/document/8766229).\n* Temporal strings are normal strings. To compare temporal strings as dates/times, use ``date_difference()``.",
"categories": [
"texts",
"comparison"
],
"parameters": [
{
"name": "x",
"description": "First operand.",
"schema": {
"type": [
"number",
"boolean",
"string",
"null"
]
}
},
{
"name": "y",
"description": "Second operand.",
"schema": {
"type": [
"number",
"boolean",
"string",
"null"
]
}
},
{
"name": "delta",
"description": "Only applicable for comparing two numbers. If this optional parameter is set to a positive non-zero number the non-equality of two numbers is checked against a delta value. This is especially useful to circumvent problems with floating-point inaccuracy in machine-based computation.\n\nThis option is basically an alias for the following computation: `gt(abs(minus([x, y]), delta)`",
"schema": {
"type": [
"number",
"null"
],
"minimumExclusive": 0
},
"default": null,
"optional": true
},
{
"name": "case_sensitive",
"description": "Only applicable for comparing two strings. Case sensitive comparison can be disabled by setting this parameter to `false`.",
"schema": {
"type": "boolean"
},
"default": true,
"optional": true
}
],
"returns": {
"description": "`true` if `x` is *not* equal to `y`, the no-data value (or `null`) if any operand is a no-data value, otherwise `false`.",
"schema": {
"type": [
"boolean",
"null"
]
}
},
"examples": [
{
"arguments": {
"x": 1,
"y": null
},
"returns": null
},
{
"arguments": {
"x": 1,
"y": 1
},
"returns": false
},
{
"arguments": {
"x": 1,
"y": "1"
},
"returns": true
},
{
"arguments": {
"x": 0,
"y": false
},
"returns": true
},
{
"arguments": {
"x": 1.02,
"y": 1,
"delta": 0.01
},
"returns": true
},
{
"arguments": {
"x": -1,
"y": -1.001,
"delta": 0.01
},
"returns": false
},
{
"arguments": {
"x": 115,
"y": 110,
"delta": 10
},
"returns": false
},
{
"arguments": {
"x": "Test",
"y": "test"
},
"returns": true
},
{
"arguments": {
"x": "Test",
"y": "test",
"case_sensitive": false
},
"returns": false
},
{
"arguments": {
"x": "Ä",
"y": "ä",
"case_sensitive": false
},
"returns": false
},
{
"arguments": {
"x": "2018-01-01T00:00:00Z",
"y": "2018-01-01T00:00:00+00:00"
},
"returns": true
}
],
"links": [
{
"rel": "about",
"href": "https://ieeexplore.ieee.org/document/4610935",
"title": "IEEE Standard 754-2008 for Floating-Point Arithmetic"
}
],
"process_graph": {
"eq": {
"process_id": "eq",
"arguments": {
"x": {
"from_parameter": "x"
},
"y": {
"from_parameter": "y"
},
"delta": {
"from_parameter": "delta"
},
"case_sensitive": {
"from_parameter": "case_sensitive"
}
}
},
"not": {
"process_id": "not",
"arguments": {
"x": {
"from_node": "eq"
}
},
"result": true
}
}
}