Utils

Constructors

new Utils()

new Utils(): Utils

Returns

Utils

Methods

createResultsCsv()

static createResultsCsv(resultDF?): string

Parameters

Parameter	Type
resultDF?	DataFrame

Returns

string

Source

src/utils.ts:397

---

detectColumnHierarchy()

static detectColumnHierarchy(columns, maxDepth): string[]

Detects natural hierarchy in the list of categorical columns based on their values. Mind that the function can be n^2 in the worst case scenario, although in most cases, it is quite fast as it exits early if missmatch is found.

Parameters

Parameter	Type	Default value	Description
columns	Column<any, any>[]	undefined	List of columns to detect hierarchy in.
maxDepth	number	3	Maximum depth of the hierarchy to detect.

Returns

string[]

Source

src/utils.ts:393

---

download()

static download(filename, content, contentType?): void

Downloads the specified content locally

Parameters

Parameter	Type
filename	string
content	BlobPart
contentType?	string

Returns

void

Source

src/utils.ts:231

---

executeTests()

static executeTests(testsParams, stopOnFail?): Promise<any>

Parameters

Parameter	Type
testsParams	object[]
stopOnFail?	boolean

Returns

Promise<any>

Source

src/utils.ts:290

---

firstOrNull()

static firstOrNull<T>(iterable): null | T

Type parameters

Type parameter
T

Parameters

Parameter	Type	Description
iterable	Iterable<T>

Returns

null | T

Source

src/utils.ts:174

---

getJsonValueType()

static getJsonValueType(x): null | "string" | "bigint" | "object" | "int" | "double" | "bool" | "byte_array" | "datetime" | "qnum" | "dataframe"

Parameters

Parameter	Type
x	any

Returns

null | "string" | "bigint" | "object" | "int" | "double" | "bool" | "byte_array" | "datetime" | "qnum" | "dataframe"

Source

src/utils.ts:261

---

identity()

static identity(length): Uint32Array

Returns an 'identity' array where the element in idx-th position is equals to idx.

Parameters

Parameter	Type
length	number

Returns

Uint32Array

Source

src/utils.ts:180

---

isEmpty()

static isEmpty(s?): boolean

Parameters

Parameter	Type
s?	string

Returns

boolean

Source

src/utils.ts:196

---

jsonToColumns()

static jsonToColumns(column): void

Expands a column of JSON strings into multiple columns, one per unique key

Parameters

Parameter	Type
column	Column<string, string>

Returns

void

Source

src/utils.ts:275

---

loadJsCss()

static loadJsCss(files): Promise<null>

Loads the specified common libraries, if they were not loaded already. Use it in plugins when a big JS dependency is used infrequently, such as exporting to Excel, or showing a 3d structure. Example: loadJsCss(['common/exceljs.min.js', 'common/exceljs.min.css'])

Parameters

Parameter	Type
files	string[]

Returns

Promise<null>

Source

src/utils.ts:244

---

nullIfEmpty()

static nullIfEmpty(s?): undefined | null | string

Parameters

Parameter	Type
s?	string

Returns

undefined | null | string

Source

src/utils.ts:200

---

openFile()

static openFile(options): void

Shows "Open File" dialog, and lets you process the result.

Parameters

Parameter	Type
options	object
options.accept	string
options.open	(file) => void

Returns

void

Source

src/utils.ts:205

---

openFileBytes()

static openFileBytes(options): void

Shows "Open File" dialog, and lets you process the result.

Parameters

Parameter	Type
options	object
options.accept	string
options.open	(bytes) => void

Returns

void

Source

src/utils.ts:217

---

random()

static random<T>(items): T

Returns random element from the array. Useful for demo data, tests, etc.

Type parameters

Type parameter
T

Parameters

Parameter	Type
items	T[]

Returns

T

Source

src/utils.ts:188

---

randomString()

static randomString(length): string

Parameters

Parameter	Type
length	number

Returns

string

Source

src/utils.ts:412

---

replaceAll()

static replaceAll(string, search, replace): string

Parameters

Parameter	Type
string	string
search	string
replace	string

Returns

string

Source

src/utils.ts:192

---

streamToObservable()

static streamToObservable<T>(dartStream): Observable<T>

Type parameters

Type parameter	Value
T	any

Parameters

Parameter	Type
dartStream	any

Returns

Observable<T>

Source

src/utils.ts:248