-
-
Notifications
You must be signed in to change notification settings - Fork 239
/
array.ts
203 lines (182 loc) · 7.17 KB
/
array.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
import { toArray, argumentsToValue, toValue, stringify, caseInsensitiveCompare, isArray, isNil, last as arrayLast } from '../util'
import { equals, evalToken, isTruthy } from '../render'
import { Value, FilterImpl } from '../template'
import { Tokenizer } from '../parser'
import type { Scope } from '../context'
export const join = argumentsToValue(function (this: FilterImpl, v: any[], arg: string) {
const array = toArray(v)
const sep = isNil(arg) ? ' ' : stringify(arg)
const complexity = array.length * (1 + sep.length)
this.context.memoryLimit.use(complexity)
return array.join(sep)
})
export const last = argumentsToValue((v: any) => isArray(v) ? arrayLast(v) : '')
export const first = argumentsToValue((v: any) => isArray(v) ? v[0] : '')
export const reverse = argumentsToValue(function (this: FilterImpl, v: any[]) {
const array = toArray(v)
this.context.memoryLimit.use(array.length)
return [...array].reverse()
})
export function * sort<T> (this: FilterImpl, arr: T[], property?: string): IterableIterator<unknown> {
const values: [T, string | number][] = []
const array = toArray(arr)
this.context.memoryLimit.use(array.length)
for (const item of array) {
values.push([
item,
property ? yield this.context._getFromScope(item, stringify(property).split('.'), false) : item
])
}
return values.sort((lhs, rhs) => {
const lvalue = lhs[1]
const rvalue = rhs[1]
return lvalue < rvalue ? -1 : (lvalue > rvalue ? 1 : 0)
}).map(tuple => tuple[0])
}
export function sort_natural<T> (this: FilterImpl, input: T[], property?: string) {
const propertyString = stringify(property)
const compare = property === undefined
? caseInsensitiveCompare
: (lhs: T, rhs: T) => caseInsensitiveCompare(lhs[propertyString], rhs[propertyString])
const array = toArray(input)
this.context.memoryLimit.use(array.length)
return [...array].sort(compare)
}
export const size = (v: string | any[]) => (v && v.length) || 0
export function * map (this: FilterImpl, arr: Scope[], property: string): IterableIterator<unknown> {
const results = []
const array = toArray(arr)
this.context.memoryLimit.use(array.length)
for (const item of array) {
results.push(yield this.context._getFromScope(item, stringify(property), false))
}
return results
}
export function * sum (this: FilterImpl, arr: Scope[], property?: string): IterableIterator<unknown> {
let sum = 0
const array = toArray(arr)
for (const item of array) {
const data = Number(property ? yield this.context._getFromScope(item, stringify(property), false) : item)
sum += Number.isNaN(data) ? 0 : data
}
return sum
}
export function compact<T> (this: FilterImpl, arr: T[]) {
const array = toArray(arr)
this.context.memoryLimit.use(array.length)
return array.filter(x => !isNil(toValue(x)))
}
export function concat<T1, T2> (this: FilterImpl, v: T1[], arg: T2[] = []): (T1 | T2)[] {
const lhs = toArray(v)
const rhs = toArray(arg)
this.context.memoryLimit.use(lhs.length + rhs.length)
return lhs.concat(rhs)
}
export function push<T> (this: FilterImpl, v: T[], arg: T): T[] {
return concat.call(this, v, [arg]) as T[]
}
export function unshift<T> (this: FilterImpl, v: T[], arg: T): T[] {
const array = toArray(v)
this.context.memoryLimit.use(array.length)
const clone = [...array]
clone.unshift(arg)
return clone
}
export function pop<T> (v: T[]): T[] {
const clone = [...toArray(v)]
clone.pop()
return clone
}
export function shift<T> (this: FilterImpl, v: T[]): T[] {
const array = toArray(v)
this.context.memoryLimit.use(array.length)
const clone = [...array]
clone.shift()
return clone
}
export function slice<T> (this: FilterImpl, v: T[] | string, begin: number, length = 1): T[] | string {
v = toValue(v)
if (isNil(v)) return []
if (!isArray(v)) v = stringify(v)
begin = begin < 0 ? v.length + begin : begin
this.context.memoryLimit.use(length)
return v.slice(begin, begin + length)
}
export function * where<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
const values: unknown[] = []
arr = toArray(arr)
this.context.memoryLimit.use(arr.length)
const token = new Tokenizer(stringify(property)).readScopeValue()
for (const item of arr) {
values.push(yield evalToken(token, this.context.spawn(item)))
}
return arr.filter((_, i) => {
if (expected === undefined) return isTruthy(values[i], this.context)
return equals(values[i], expected)
})
}
export function * where_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
const filtered: unknown[] = []
const keyTemplate = new Value(stringify(exp), this.liquid)
const array = toArray(arr)
this.context.memoryLimit.use(array.length)
for (const item of array) {
const value = yield keyTemplate.value(this.context.spawn({ [itemName]: item }))
if (value) filtered.push(item)
}
return filtered
}
export function * group_by<T extends object> (this: FilterImpl, arr: T[], property: string): IterableIterator<unknown> {
const map = new Map()
arr = toArray(arr)
const token = new Tokenizer(stringify(property)).readScopeValue()
this.context.memoryLimit.use(arr.length)
for (const item of arr) {
const key = yield evalToken(token, this.context.spawn(item))
if (!map.has(key)) map.set(key, [])
map.get(key).push(item)
}
return [...map.entries()].map(([name, items]) => ({ name, items }))
}
export function * group_by_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
const map = new Map()
const keyTemplate = new Value(stringify(exp), this.liquid)
arr = toArray(arr)
this.context.memoryLimit.use(arr.length)
for (const item of arr) {
const key = yield keyTemplate.value(this.context.spawn({ [itemName]: item }))
if (!map.has(key)) map.set(key, [])
map.get(key).push(item)
}
return [...map.entries()].map(([name, items]) => ({ name, items }))
}
export function * find<T extends object> (this: FilterImpl, arr: T[], property: string, expected: string): IterableIterator<unknown> {
const token = new Tokenizer(stringify(property)).readScopeValue()
const array = toArray(arr)
for (const item of array) {
const value = yield evalToken(token, this.context.spawn(item))
if (equals(value, expected)) return item
}
}
export function * find_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
const predicate = new Value(stringify(exp), this.liquid)
const array = toArray(arr)
for (const item of array) {
const value = yield predicate.value(this.context.spawn({ [itemName]: item }))
if (value) return item
}
}
export function uniq<T> (this: FilterImpl, arr: T[]): T[] {
arr = toArray(arr)
this.context.memoryLimit.use(arr.length)
return [...new Set(arr)]
}
export function sample<T> (this: FilterImpl, v: T[] | string, count = 1): T | string | (T | string)[] {
v = toValue(v)
if (isNil(v)) return []
if (!isArray(v)) v = stringify(v)
this.context.memoryLimit.use(count)
const shuffled = [...v].sort(() => Math.random() - 0.5)
if (count === 1) return shuffled[0]
return shuffled.slice(0, count)
}