1. add
    1. #
  2. all
    1. >
    2. C
  3. alter
    1. >
    2. C
  4. any
    1. >
    2. C
  5. append
    1. S
  6. appendAll
    1. >
    2. A
  7. appendOne
    1. A
  8. assignDefaults
    1. >
    2. K
  9. assignOverrides
    1. >
    2. K
  10. compareByPath
  11. compareByProp
  12. compose
    1. >
  13. containedIn
    1. @
  14. contains
    1. >
    2. &
  15. dateIsBetween
    1. D
  16. defaultFalseyValTo
    1. @
  17. defaultNullishValTo
    1. @
  18. discard
    1. >
    2. C
  19. discardFirst
    1. >
    2. Q
  20. discardFirstWhile
    1. >
    2. A
  21. discardLast
    1. >
    2. Q
  22. discardLastWhile
    1. >
    2. A
  23. discardRange
    1. A
  24. discardWhen
    1. >
    2. C
  25. divideBy
    1. #
  26. endsWith
    1. S
  27. expand
    1. >
    2. S
  28. expandEnd
    1. >
    2. S
  29. expandStart
    1. >
    2. S
  30. fillRangeWith
    1. A
  31. fillWith
    1. A
  32. find
    1. C
  33. findKey
    1. E
  34. findKeyWithVal
    1. >
    2. $
  35. findLast
    1. A
  36. findLastKey
    1. >
    2. A
  37. findLastKeyWithVal
    1. >
    2. Q
  38. first
    1. >
    2. Q
  39. flattenFully
    1. A
  40. flattenOnce
    1. A
  41. flattenToDepth
    1. A
  42. forEach
    1. C
  43. get
    1. @
  44. getAtPath
    1. @
  45. getAverageValue
  46. getCommonValues
    1. >
  47. getExclusiveValues
  48. getKeys
    1. E
  49. getMaxValue
    1. C
  50. getMinValue
    1. C
  51. getRandomValue
    1. C
  52. getSize
    1. &
  53. getValueAtMapKey
    1. P
  54. getValues
    1. E
  55. greaterThan
    1. #
  56. greaterThanOrEqualTo
    1. #
  57. groupBy
    1. C
  58. invert
    1. K
  59. invokeWith
    1. F
  60. isAfter
    1. D
  61. isAtOrAfter
    1. D
  62. isAtOrBefore
    1. D
  63. isBefore
    1. D
  64. isEmpty
    1. &
  65. isFalsey
    1. @
  66. isLaden
    1. &
  67. isTruthy
    1. @
  68. joinValues
    1. C
  69. keep
    1. C
  70. keepFirst
    1. >
    2. Q
  71. keepFirstWhile
    1. >
    2. A
  72. keepLast
    1. >
    2. Q
  73. keepLastWhile
    1. >
    2. A
  74. keepRange
    1. Q
  75. keepWhen
    1. C
  76. last
    1. Q
  77. lessThan
    1. #
  78. lessThanOrEqualTo
    1. #
  79. mAppendAll
    1. M
    2. A
  80. mAppendOne
    1. M
    2. A
  81. mAssignDefaults
    1. M
    2. K
  82. mAssignOverrides
    1. M
    2. K
  83. mDiscardFirst
    1. >
    2. M
    3. A
  84. mDiscardFirstWhile
    1. >
    2. M
    3. A
  85. mDiscardLast
    1. >
    2. M
    3. A
  86. mDiscardLastWhile
    1. >
    2. M
    3. A
  87. mDiscardRange
    1. M
    2. A
  88. mFillRangeWith
    1. M
    2. A
  89. mFillWith
    1. M
    2. E
  90. mKeepFirst
    1. >
    2. M
    3. A
  91. mKeepFirstWhile
    1. >
    2. M
    3. A
  92. mKeepLast
    1. >
    2. M
    3. A
  93. mKeepLastWhile
    1. >
    2. M
    3. A
  94. mKeepRange
    1. M
    2. A
  95. mMapValues
    1. M
    2. E
  96. mOmit
    1. M
    2. E
  97. mOrder
    1. M
    2. A
  98. mPick
    1. M
    2. E
  99. mPrependAll
    1. M
    2. A
  100. mPrependOne
    1. M
    2. A
  101. mReverse
    1. M
    2. A
  102. mSet
    1. M
  103. mSetAtPath
    1. M
  104. mShuffle
    1. M
    2. A
  105. mUpdate
    1. M
    2. E
  106. mapKeys
    1. K
  107. mapValues
    1. C
  108. multiplyBy
    1. #
  109. negate
  110. numberIsBetween
    1. #
  111. omit
    1. E
  112. order
    1. A
  113. pAll
    1. >
    2. ǁ
    3. C
  114. pAny
    1. >
    2. ǁ
    3. C
  115. pCompose
    1. >
    2. ǁ
  116. pDiscardWhen
    1. >
    2. ǁ
    3. C
  117. pFind
    1. >
    2. ǁ
    3. C
  118. pForEach
    1. >
    2. ǁ
    3. C
  119. pKeepWhen
    1. >
    2. ǁ
    3. C
  120. pMapValues
    1. >
    2. ǁ
    3. C
  121. pPassThrough
    1. ǁ
  122. pResolveValues
    1. >
    2. ǁ
    3. C
  123. pWaitMs
    1. ǁ
  124. passThrough
  125. peek
    1. >
    2. @
  126. pick
    1. E
  127. prepend
    1. S
  128. prependAll
    1. >
    2. A
  129. prependOne
    1. A
  130. prune
    1. >
    2. S
  131. pruneEnd
    1. >
    2. S
  132. pruneStart
    1. >
    2. S
  133. randomlyKeep
    1. C
  134. replaceAllMatches
    1. >
    2. S
  135. replaceFirstMatch
    1. >
    2. S
  136. returnFirstArg
    1. >
    2. @
  137. returnUndefined
    1. >
  138. reverse
    1. A
  139. roundToNearest
    1. #
  140. set
    1. E
  141. shuffle
    1. A
  142. split
    1. S
  143. splitEvery
    1. >
    2. Q
  144. startsWith
    1. S
  145. strictEquals
    1. @
  146. subtract
    1. #
  147. sumValues
    1. C
  148. swapFirstTwoArgs
    1. F
  149. transpose
    1. >
  150. truncateToNChars
    1. S
  151. truncateToNLines
    1. S
  152. update
    1. E
  153. withDatesAscending
  154. withDatesDescending
  155. withNumbersAscending
  156. withNumbersDescending
  157. withStringsAscending
  158. withStringsDescending

strictEquals

strictEquals

  • (item1: any) => (item2: any) => boolean

  1. Test whether something strictly equals another

    In other words, it returns the result of item1 === item2

    Try It
    const isKim = strictEquals('kim')
isKim('kim') // is true
isKim('grace') // is false

const sam = { name: 'sam' }
const isReferenceToSam = strictEquals(sam)
isReferenceToSam(sam) // is true
isReferenceToSam({ name: 'sam' }) // is false
const isKim = strictEquals('kim')
isKim('kim') // is true
isKim('grace') // is false

const sam = { name: 'sam' }
const isReferenceToSam = strictEquals(sam)
isReferenceToSam(sam) // is true
isReferenceToSam({ name: 'sam' }) // is false
    Try It
    const isKim = strictEquals('kim')
isKim('kim') // is true
isKim('grace') // is false

const sam = { name: 'sam' }
const isReferenceToSam = strictEquals(sam)
isReferenceToSam(sam) // is true
isReferenceToSam({ name: 'sam' }) // is false
const isKim = strictEquals('kim')
isKim('kim') // is true
isKim('grace') // is false

const sam = { name: 'sam' }
const isReferenceToSam = strictEquals(sam)
isReferenceToSam(sam) // is true
isReferenceToSam({ name: 'sam' }) // is false

  2. We often want to test for strict equality. Below, we have our basketball schedule for the season. Our rivals are the pandas, so let's see when we face them.

    Try It
    const schedule = {
  '2025 03 12': 'koalas',
  '2025 03 15': 'cats',
  '2025 03 17': 'pandas',
  '2025 03 18': 'koalas',
  '2025 03 20': 'cats',
  '2025 03 23': 'pandas',
}

const getRivalDates = compose([keepWhen(strictEquals('pandas')), Object.keys])

const dates = getRivalDates(schedule)
console.log(dates)
// is [
//   2025 03 17,
//   2025 03 23,
// ]
type Schedule = Record<string, string>
const schedule: Schedule = {
  '2025 03 12': 'koalas',
  '2025 03 15': 'cats',
  '2025 03 17': 'pandas',
  '2025 03 18': 'koalas',
  '2025 03 20': 'cats',
  '2025 03 23': 'pandas',
}
const getRivalDates = compose([
  keepWhen(strictEquals('pandas'))<Schedule>,
  Object.keys,
])

const dates = getRivalDates(schedule)
console.log(dates)
// is [
//   2025 03 17,
//   2025 03 23,
// ]
    Try It
    const schedule = {
  '2025 03 12': 'koalas',
  '2025 03 15': 'cats',
  '2025 03 17': 'pandas',
  '2025 03 18': 'koalas',
  '2025 03 20': 'cats',
  '2025 03 23': 'pandas',
}

const getRivalDates = compose([
  keepWhen(strictEquals('pandas')),
  Object.keys,
])

const dates = getRivalDates(schedule)
console.log(dates)
// is [
//   2025 03 17,
//   2025 03 23,
// ]
type Schedule = Record<string, string>
const schedule: Schedule = {
  '2025 03 12': 'koalas',
  '2025 03 15': 'cats',
  '2025 03 17': 'pandas',
  '2025 03 18': 'koalas',
  '2025 03 20': 'cats',
  '2025 03 23': 'pandas',
}
const getRivalDates = compose([
  keepWhen(strictEquals('pandas'))<Schedule>,
  Object.keys,
])

const dates = getRivalDates(schedule)
console.log(dates)
// is [
//   2025 03 17,
//   2025 03 23,
// ]