- _-chunk
- _-compact
- _-concat
- _-difference
- _-differenceBy
- _-differenceWith
- _-drop
- _-dropRight
- _-dropRightWhile
- _-dropWhile
- _-fill
- _-findIndex
- _-findLastIndex
- _-flatten
- _-flattenDeep
- _-flattenDepth
- _-fromPairs
- _-head
- _-indexOf
- _-initial
- _-intersection
- _-intersectionBy
- _-intersectionWith
- _-join
- _-last
- _-lastIndexOf
- _-nth
- _-pull
- _-pullAll
- _-pullAllBy
- _-pullAllWith
- _-pullAt
- _-remove
- _-reverse
- _-slice
- _-sortedIndex
- _-sortedIndexBy
- _-sortedIndexOf
- _-sortedLastIndex
- _-sortedLastIndexBy
- _-sortedLastIndexOf
- _-sortedUniq
- _-sortedUniqBy
- _-tail
- _-take
- _-takeRight
- _-takeRightWhile
- _-takeWhile
- _-union
- _-unionBy
- _-unionWith
- _-uniq
- _-uniqBy
- _-uniqWith
- _-unzip
- _-unzipWith
- _-without
- _-xor
- _-xorBy
- _-xorWith
- _-zip
- _-zipObject
- _-zipObjectDeep
- _-zipWith
- _-countBy
- _-every
- _-filter
- _-find
- _-findLast
- _-flatMap
- _-flatMapDeep
- _-flatMapDepth
- _-forEach
- _-forEachRight
- _-groupBy
- _-includes
- _-invokeMap
- _-keyBy
- _-map
- _-orderBy
- _-partition
- _-reduce
- _-reduceRight
- _-reject
- _-sample
- _-sampleSize
- _-shuffle
- _-size
- _-some
- _-sortBy
- _-now
- _-after
- _-ary
- _-before
- _-bind
- _-bindKey
- _-curry
- _-curryRight
- _-debounce
- _-defer
- _-delay
- _-flip
- _-memoize
- _-negate
- _-once
- _-overArgs
- _-partial
- _-partialRight
- _-rearg
- _-rest
- _-spread
- _-throttle
- _-unary
- _-wrap
- _-castArray
- _-clone
- _-cloneDeep
- _-cloneDeepWith
- _-cloneWith
- _-conformsTo
- _-eq
- _-gt
- _-gte
- _-isArguments
- _-isArray
- _-isArrayBuffer
- _-isArrayLike
- _-isArrayLikeObject
- _-isBoolean
- _-isBuffer
- _-isDate
- _-isElement
- _-isEmpty
- _-isEqual
- _-isEqualWith
- _-isError
- _-isFinite
- _-isFunction
- _-isInteger
- _-isLength
- _-isMap
- _-isMatch
- _-isMatchWith
- _-isNaN
- _-isNative
- _-isNil
- _-isNull
- _-isNumber
- _-isObject
- _-isObjectLike
- _-isPlainObject
- _-isRegExp
- _-isSafeInteger
- _-isSet
- _-isString
- _-isSymbol
- _-isTypedArray
- _-isUndefined
- _-isWeakMap
- _-isWeakSet
- _-lt
- _-lte
- _-toArray
- _-toFinite
- _-toInteger
- _-toLength
- _-toNumber
- _-toPlainObject
- _-toSafeInteger
- _-toString
- _-add
- _-ceil
- _-divide
- _-floor
- _-max
- _-maxBy
- _-mean
- _-meanBy
- _-min
- _-minBy
- _-multiply
- _-round
- _-subtract
- _-sum
- _-sumBy
- _-clamp
- _-inRange
- _-random
- _-assign
- _-assignIn
- _-assignInWith
- _-assignWith
- _-at
- _-create
- _-defaults
- _-defaultsDeep
- _-findKey
- _-findLastKey
- _-forIn
- _-forInRight
- _-forOwn
- _-forOwnRight
- _-functions
- _-functionsIn
- _-get
- _-has
- _-hasIn
- _-invert
- _-invertBy
- _-invoke
- _-keys
- _-keysIn
- _-mapKeys
- _-mapValues
- _-merge
- _-mergeWith
- _-omit
- _-omitBy
- _-pick
- _-pickBy
- _-result
- _-set
- _-setWith
- _-toPairs
- _-toPairsIn
- _-transform
- _-unset
- _-update
- _-updateWith
- _-values
- _-valuesIn
- _
- _-chain
- _-tap
- _-thru
- _-prototypeSymbol-iterator
- _-prototype-at
- _-prototype-chain
- _-prototype-commit
- _-prototype-next
- _-prototype-plant
- _-prototype-reverse
- _-prototype-value
- _-camelCase
- _-capitalize
- _-deburr
- _-endsWith
- _-escape
- _-escapeRegExp
- _-kebabCase
- _-lowerCase
- _-lowerFirst
- _-pad
- _-padEnd
- _-padStart
- _-parseInt
- _-repeat
- _-replace
- _-snakeCase
- _-split
- _-startCase
- _-startsWith
- _-template
- _-toLower
- _-toUpper
- _-trim
- _-trimEnd
- _-trimStart
- _-truncate
- _-unescape
- _-upperCase
- _-upperFirst
- _-words
- _-attempt
- _-bindAll
- _-cond
- _-conforms
- _-constant
- _-defaultTo
- _-flow
- _-flowRight
- _-identity
- _-iteratee
- _-matches
- _-matchesProperty
- _-method
- _-methodOf
- _-mixin
- _-noConflict
- _-noop
- _-nthArg
- _-over
- _-overEvery
- _-overSome
- _-property
- _-propertyOf
- _-range
- _-rangeRight
- _-runInContext
- _-stubArray
- _-stubFalse
- _-stubObject
- _-stubString
- _-stubTrue
- _-times
- _-toPath
- _-uniqueId
- _-VERSION
- _-templateSettings
- _-templateSettings-escape
- _-templateSettings-evaluate
- _-templateSettings-imports
- _-templateSettings-interpolate
- _-templateSettings-variable
- _-templateSettings-imports-_
- 索引
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_-find
_.find(collection, [predicate=_.identity], [fromIndex=0])
View in source See the npm package
遍历 collection
(集合)元素,返回 predicate
(断言函数)第一个返回真值的第一个元素。predicate(断言函数)调用3个参数: (value, index|key, collection)。
添加版本
0.1.0
参数
collection
(Array|Object): 一个用来迭代的集合。[predicate=_.identity]
(Array|Function|Object|string): 每次迭代调用的函数。[fromIndex=0]
(number): 开始搜索的索引位置。
返回
(*): 返回匹配元素,否则返回 undefined
。
例子
var users = [ { 'user': 'barney', 'age': 36, 'active': true }, { 'user': 'fred', 'age': 40, 'active': false }, { 'user': 'pebbles', 'age': 1, 'active': true }]; _.find(users, function(o) { return o.age < 40; });// => object for 'barney' // The `_.matches` iteratee shorthand._.find(users, { 'age': 1, 'active': true });// => object for 'pebbles' // The `_.matchesProperty` iteratee shorthand._.find(users, ['active', false]);// => object for 'fred' // The `_.property` iteratee shorthand._.find(users, 'active');// => object for 'barney'
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