Parameters.ts.html
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">export interface CSVParseParam {
/**
* delimiter used for seperating columns. Use "auto" if delimiter is unknown in advance, in this case, delimiter will be auto-detected (by best attempt). Use an array to give a list of potential delimiters e.g. [",","|","$"]. default: ","
*/
delimiter: string | string[];
/**
* This parameter instructs the parser to ignore columns as specified by an array of column indexes or header names. Example: [1,3,5,"title","age"] will ignore columns 1, 3, 5, title column and age column and will not return them in the JSON output
*/
ignoreColumns?: RegExp;
/**
* This parameter instructs the parser to include only those columns as specified by an array of column indexes or header names. Example: [0,2,3,"name"] will parse and include only columns 0, 2, 3, and column with header "name" in the JSON output.
*/
includeColumns?: RegExp;
/**
* If a column contains delimiter, it is able to use quote character to surround the column content. e.g. "hello, world" wont be split into two columns while parsing. Set to "off" will ignore all quotes. default: " (double quote)
*/
quote: string;
/**
* Indicate if parser trim off spaces surrounding column content. e.g. " content " will be trimmed to "content". Default: true
*/
trim: boolean;
/**
* This parameter turns on and off whether check field type. Default is false.
*/
checkType: boolean;
/**
* Ignore the empty value in CSV columns. If a column value is not given, set this to true to skip them. Default: false.
*/
ignoreEmpty: boolean;
/**
* Delegate parsing work to another process.
*/
fork: boolean;
/**
* Indicating csv data has no header row and first row is data row. Default is false.
*/
noheader: boolean;
/**
* An array to specify the headers of CSV data. If --noheader is false, this value will override CSV header row. Default: null. Example: ["my field","name"].
*/
headers?: string[];
/**
* Don't interpret dots (.) and square brackets in header fields as nested object or array identifiers at all (treat them like regular characters for JSON field identifiers). Default: false.
*/
flatKeys: boolean;
/**
* the max character a csv row could have. 0 means infinite. If max number exceeded, parser will emit "error" of "row_exceed". if a possibly corrupted csv data provided, give it a number like 65535 so the parser wont consume memory. default: 0
*/
maxRowLength: number;
/**
* whether check column number of a row is the same as headers. If column number mismatched headers number, an error of "mismatched_column" will be emitted.. default: false
*/
checkColumn: boolean;
/**
* escape character used in quoted column. Default is double quote (") according to RFC4108. Change to back slash (\) or other chars for your own case.
*/
escape: string;
/**
* Allows override parsing logic for a specific column. It accepts a JSON object with fields like: headName: <String | Function> . e.g. {field1:'number'} will use built-in number parser to convert value of the field1 column to number. Another example {"name":nameProcessFunc} will use specified function to parse the value.
*/
colParser: {
[key: string]: string | CellParser | ColumnParam
};
/**
* End of line character. If omitted, parser will attempt to retrieve it from the first chunks of CSV data
*/
eol?: string;
/**
* Always interpret each line (as defined by eol) as a row. This will prevent eol characters from being used within a row (even inside a quoted field). This ensures that misplaced quotes only break on row, and not all ensuing rows.
*/
alwaysSplitAtEOL: boolean;
output: "json" | "csv" | "line";
}
export type CellParser = (item: string, head: string, resultRow: any, row: string[], columnIndex: number) => any;
export interface ColumnParam {
flat?: boolean;
cellParser?: string | CellParser;
}
export function mergeParams(params?: Partial<CSVParseParam>): CSVParseParam {
const defaultParam: CSVParseParam = {
delimiter: ',',
ignoreColumns: undefined,
includeColumns: undefined,
quote: '"',
trim: true,
checkType: false,
ignoreEmpty: false,
fork: false,
noheader: false,
headers: undefined,
flatKeys: false,
maxRowLength: 0,
checkColumn: false,
escape: '"',
colParser: {},
eol: undefined,
alwaysSplitAtEOL: false,
output: "json"
}
if (!params) {
params = {};
}
for (let key in params) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (params.hasOwnProperty(key)) {
if (Array.isArray(params[key])) {
defaultParam[key] = [].concat(params[key]);
} else {
defaultParam[key] = params[key];
}
}
}
return defaultParam;
}
</pre></td></tr>
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