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Add Head and Tail operations

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This commit is contained in:
toby 2017-04-21 23:06:59 -04:00
parent 07bb095e73
commit dea214bd2e
3 changed files with 338 additions and 1 deletions
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64
src/core/config/OperationConfig.js
View File

@ -3196,7 +3196,69 @@ const OperationConfig = {
outputType: "html",
args: [
]
}
},
"Head": {
description: [
"Like the UNIX head utility.",
"<br>",
"Gets the first $Number of lines.",
"<br>",
"Optionally you can select all but the last $Number of lines.",
"<br>",
"The delimiter can be changed so that instead of lines, fields (i.e. commas) are selected instead.",
].join("\n"),
run: StrUtils.runHead,
inputType: "string",
outputType: "string",
args: [
{
name: "Delimiter",
type: "option",
value: StrUtils.DELIMITER_OPTIONS
},
{
name: "Number",
type: "number",
value: 10,
},
{
name: "All but last $Number of lines",
type: "boolean",
value: false,
},
]
},
"Tail": {
description: [
"Like the UNIX tail utility.",
"<br>",
"Gets the last $Number of lines.",
"<br>",
"Optionally you can select all lines after line $Number.",
"<br>",
"The delimiter can be changed so that instead of lines, fields (i.e. commas) are selected instead.",
].join("\n"),
run: StrUtils.runTail,
inputType: "string",
outputType: "string",
args: [
{
name: "Delimiter",
type: "option",
value: StrUtils.DELIMITER_OPTIONS
},
{
name: "Number",
type: "number",
value: 10,
},
{
name: "Start from line $Number",
type: "boolean",
value: false,
},
]
},
};
export default OperationConfig;

55
src/core/operations/StrUtils.js
View File

@ -537,6 +537,61 @@ const StrUtils = {
return output;
},
/**
* Head lines operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
runHead: function(input, args) {
let delimiter = args[0],
number = args[1],
allBut = args[2];
delimiter = Utils.charRep[delimiter];
let splitInput = input.split(delimiter);
return splitInput
.filter((line, lineIndex) => {
lineIndex += 1;
if (allBut) {
return lineIndex <= splitInput.length - number;
} else {
return lineIndex <= number;
}
})
.join(delimiter);
},
/**
* Tail lines operation.
*
* @param {string} input
* @param {Object[]} args
* @returns {string}
*/
runTail: function(input, args) {
let delimiter = args[0],
number = args[1],
allBut = args[2];
delimiter = Utils.charRep[delimiter];
let splitInput = input.split(delimiter);
return splitInput
.filter((line, lineIndex) => {
lineIndex += 1;
if (allBut) {
return lineIndex >= number;
} else {
return lineIndex > splitInput.length - number;
}
})
.join(delimiter);
},
};
export default StrUtils;

220
test/tests/operations/StrUtils.js
View File

@ -34,4 +34,224 @@ TestRegister.addTests([
}
],
},
{
name: "Head 0",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 0, false]
}
],
},
{
name: "Head 1",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 1, false]
}
],
},
{
name: "Head 2",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 2, false]
}
],
},
{
name: "Head 6",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 6, false]
}
],
},
{
name: "Head big",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 100, false]
}
],
},
{
name: "Head all but 0",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 0, true]
}
],
},
{
name: "Head all but 1",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 1, true]
}
],
},
{
name: "Head all but 2",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 2, true]
}
],
},
{
name: "Head all but 6",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 6, true]
}
],
},
{
name: "Head all but big",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [].join("\n"),
recipeConfig: [
{
"op": "Head",
"args": ["Line feed", 100, true]
}
],
},
{
name: "Tail 0",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 0, false]
}
],
},
{
name: "Tail 1",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 1, false]
}
],
},
{
name: "Tail 2",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 2, false]
}
],
},
{
name: "Tail 6",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 6, false]
}
],
},
{
name: "Tail big",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 100, false]
}
],
},
{
name: "Tail all but 0",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 0, true]
}
],
},
{
name: "Tail all but 1",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [1, 2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 1, true]
}
],
},
{
name: "Tail all but 2",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [2, 3, 4, 5, 6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 2, true]
}
],
},
{
name: "Tail all but 6",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [6].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 6, true]
}
],
},
{
name: "Tail all but big",
input: [1, 2, 3, 4, 5, 6].join("\n"),
expectedOutput: [].join("\n"),
recipeConfig: [
{
"op": "Tail",
"args": ["Line feed", 100, true]
}
],
},
]);