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bindKey.html
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<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var _speedMark = new Date();
</script>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="keyworkds" content="lodash文档,lodash中文,lodash中文文档,Lodash,Lodashjs,underscore,underscorejs,javascript,lib,module">
<meta name="description" content="lodash 是一个 JavaScript 的实用工具库, 表现一致性, 模块化, 高性能, 以及 可扩展"/>
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<title>lodash中文文档 bindKey</title>
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<a href="./" title="lodash"><img src="./images/logo.png" alt="lodash">v4.5.0正式版</a>
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<div id="search">
<form id="search-form" action="./" method="GET">
<input type="search" name="q" id="q" placeholder="搜索内容.." autocomplete="off">
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<div id="toc">
<div id="tochead"><a href="./">主页</a></div>
<ul>
<li id="page-tree" class="folder">
<ul>
<li><a href="./getting-started" title="Getting Started">Getting Started</a></li>
<li><a href="./custom-builds" title="Custom Builds">Custom Builds</a></li>
<li><a href="./all" title="All-in-one Doc">All-in-one Doc</a></li>
</ul></li>
<li id="page-tree-array" class="folder"><span class="folderPage">Array</span>
<ul>
<li><a href="./chunk" title="_.chunk(array, [size=0])">chunk</a></li>
<li><a href="./compact" title="_.compact(array)">compact</a></li>
<li><a href="./concat" title="_.concat(array, [values])">concat</a></li>
<li><a href="./difference" title="_.difference(array, [values])">difference</a></li>
<li><a href="./differenceBy" title="_.differenceBy(array, [values], [iteratee=_.identity])">differenceBy</a></li>
<li><a href="./differenceWith" title="_.differenceWith(array, [values], [comparator])">differenceWith</a></li>
<li><a href="./drop" title="_.drop(array, [n=1])">drop</a></li>
<li><a href="./dropRight" title="_.dropRight(array, [n=1])">dropRight</a></li>
<li><a href="./dropRightWhile" title="_.dropRightWhile(array, [predicate=_.identity])">dropRightWhile</a></li>
<li><a href="./dropWhile" title="_.dropWhile(array, [predicate=_.identity])">dropWhile</a></li>
<li><a href="./fill" title="_.fill(array, value, [start=0], [end=array.length])">fill</a></li>
<li><a href="./findIndex" title="_.findIndex(array, [predicate=_.identity])">findIndex</a></li>
<li><a href="./findLastIndex" title="_.findLastIndex(array, [predicate=_.identity])">findLastIndex</a></li>
<li><a href="./flatten" title="_.flatten(array)">flatten</a></li>
<li><a href="./flattenDeep" title="_.flattenDeep(array)">flattenDeep</a></li>
<li><a href="./flattenDepth" title="_.flattenDepth(array, [depth=1])">flattenDepth</a></li>
<li><a href="./fromPairs" title="_.fromPairs(pairs)">fromPairs</a></li>
<li><a href="./head" title="_.head(array)">head <span class="aliases">first</span></a></li>
<li><a href="./indexOf" title="_.indexOf(array, value, [fromIndex=0])">indexOf</a></li>
<li><a href="./initial" title="_.initial()">initial</a></li>
<li><a href="./intersection" title="_.intersection([arrays])">intersection</a></li>
<li><a href="./intersectionBy" title="_.intersectionBy([arrays], [iteratee=_.identity])">intersectionBy</a></li>
<li><a href="./intersectionWith" title="_.intersectionWith([arrays], [comparator])">intersectionWith</a></li>
<li><a href="./join" title="_.join(array, [separator=','])">join</a></li>
<li><a href="./last" title="_.last(array)">last</a></li>
<li><a href="./lastIndexOf" title="_.lastIndexOf(array, value, [fromIndex=array.length-1])">lastIndexOf</a></li>
<li><a href="./prototype-reverse" title="_.prototype.reverse()">prototype.reverse</a></li>
<li><a href="./pull" title="_.pull(array, [values])">pull</a></li>
<li><a href="./pullAll" title="_.pullAll(array, values)">pullAll</a></li>
<li><a href="./pullAllBy" title="_.pullAllBy(array, values, [iteratee=_.identity])">pullAllBy</a></li>
<li><a href="./pullAt" title="_.pullAt(array, [indexes])">pullAt</a></li>
<li><a href="./remove" title="_.remove(array, [predicate=_.identity])">remove</a></li>
<li><a href="./slice" title="_.slice(array, [start=0], [end=array.length])">slice</a></li>
<li><a href="./sortedIndex" title="_.sortedIndex(array, value)">sortedIndex</a></li>
<li><a href="./sortedIndexBy" title="_.sortedIndexBy(array, value, [iteratee=_.identity])">sortedIndexBy</a></li>
<li><a href="./sortedIndexOf" title="_.sortedIndexOf(array, value)">sortedIndexOf</a></li>
<li><a href="./sortedLastIndex" title="_.sortedLastIndex(array, value)">sortedLastIndex</a></li>
<li><a href="./sortedLastIndexBy" title="_.sortedLastIndexBy(array, value, [iteratee=_.identity])">sortedLastIndexBy</a></li>
<li><a href="./sortedLastIndexOf" title="_.sortedLastIndexOf(array, value)">sortedLastIndexOf</a></li>
<li><a href="./sortedUniq" title="_.sortedUniq(array)">sortedUniq</a></li>
<li><a href="./sortedUniqBy" title="_.sortedUniqBy(array, [iteratee])">sortedUniqBy</a></li>
<li><a href="./tail" title="_.tail(array)">tail</a></li>
<li><a href="./take" title="_.take(array, [n=1])">take</a></li>
<li><a href="./takeRight" title="_.takeRight(array, [n=1])">takeRight</a></li>
<li><a href="./takeRightWhile" title="_.takeRightWhile(array, [predicate=_.identity])">takeRightWhile</a></li>
<li><a href="./takeWhile" title="_.takeWhile(array, [predicate=_.identity])">takeWhile</a></li>
<li><a href="./union" title="_.union([arrays])">union</a></li>
<li><a href="./unionBy" title="_.unionBy([arrays], [iteratee=_.identity])">unionBy</a></li>
<li><a href="./unionWith" title="_.unionWith([arrays], [comparator])">unionWith</a></li>
<li><a href="./uniq" title="_.uniq(array)">uniq</a></li>
<li><a href="./uniqBy" title="_.uniqBy(array, [iteratee=_.identity])">uniqBy</a></li>
<li><a href="./uniqWith" title="_.uniqWith(array, [comparator])">uniqWith</a></li>
<li><a href="./unzip" title="_.unzip(array)">unzip</a></li>
<li><a href="./unzipWith" title="_.unzipWith(array, [iteratee=_.identity])">unzipWith</a></li>
<li><a href="./without" title="_.without(array, [values])">without</a></li>
<li><a href="./xor" title="_.xor([arrays])">xor</a></li>
<li><a href="./xorBy" title="_.xorBy([arrays], [iteratee=_.identity])">xorBy</a></li>
<li><a href="./xorWith" title="_.xorWith([arrays], [comparator])">xorWith</a></li>
<li><a href="./zip" title="_.zip([arrays])">zip</a></li>
<li><a href="./zipObject" title="_.zipObject([props=[]], [values=[]])">zipObject</a></li>
<li><a href="./zipObjectDeep" title="_.zipObjectDeep([props=[]], [values=[]])">zipObjectDeep</a></li>
<li><a href="./zipWith" title="_.zipWith([arrays])">zipWith</a></li>
</ul></li>
<li id="page-tree-collection" class="folder"><span class="folderPage">Collection</span>
<ul>
<li><a href="./countBy" title="_.countBy(collection, [iteratee=_.identity])">countBy</a></li>
<li><a href="./every" title="_.every(collection, [predicate=_.identity])">every</a></li>
<li><a href="./filter" title="_.filter(collection, [predicate=_.identity])">filter</a></li>
<li><a href="./find" title="_.find(collection, [predicate=_.identity])">find</a></li>
<li><a href="./findLast" title="_.findLast(collection, [predicate=_.identity])">findLast</a></li>
<li><a href="./flatMap" title="_.flatMap(collection, [iteratee=_.identity])">flatMap</a></li>
<li><a href="./forEach" title="_.forEach(collection, [iteratee=_.identity])">forEach <span class="aliases">each</span></a></li>
<li><a href="./forEachRight" title="_.forEachRight(collection, [iteratee=_.identity])">forEachRight <span class="aliases">eachRight</span></a></li>
<li><a href="./groupBy" title="_.groupBy(collection, [iteratee=_.identity])">groupBy</a></li>
<li><a href="./includes" title="_.includes(collection, value, [fromIndex=0])">includes</a></li>
<li><a href="./invokeMap" title="_.invokeMap(collection, path, [args])">invokeMap</a></li>
<li><a href="./keyBy" title="_.keyBy(collection, [iteratee=_.identity])">keyBy</a></li>
<li><a href="./map" title="_.map(collection, [iteratee=_.identity])">map</a></li>
<li><a href="./orderBy" title="_.orderBy(collection, [iteratees=[_.identity]], [orders])">orderBy</a></li>
<li><a href="./partition" title="_.partition(collection, [predicate=_.identity])">partition</a></li>
<li><a href="./reduce" title="_.reduce(collection, [iteratee=_.identity], [accumulator])">reduce</a></li>
<li><a href="./reduceRight" title="_.reduceRight(collection, [iteratee=_.identity], [accumulator])">reduceRight</a></li>
<li><a href="./reject" title="_.reject(collection, [predicate=_.identity])">reject</a></li>
<li><a href="./sample" title="_.sample(collection)">sample</a></li>
<li><a href="./sampleSize" title="_.sampleSize(collection, [n=0])">sampleSize</a></li>
<li><a href="./shuffle" title="_.shuffle(collection)">shuffle</a></li>
<li><a href="./size" title="_.size(collection)">size</a></li>
<li><a href="./some" title="_.some(collection, [predicate=_.identity])">some</a></li>
<li><a href="./sortBy" title="_.sortBy(collection, [iteratees=[_.identity]])">sortBy</a></li>
</ul></li>
<li id="page-tree-date" class="folder"><span class="folderPage">Date</span>
<ul>
<li><a href="./now" title="_.now()">now</a></li>
</ul></li>
<li id="page-tree-function" class="folder"><span class="folderPage">Function</span>
<ul>
<li><a href="./after" title="_.after(n, func)">after</a></li>
<li><a href="./ary" title="_.ary(func, [n=func.length])">ary</a></li>
<li><a href="./before" title="_.before(n, func)">before</a></li>
<li><a href="./bind" title="_.bind(func, thisArg, [partials])">bind</a></li>
<li><a href="./bindKey" title="_.bindKey(object, key, [partials])" class = "open">bindKey</a></li>
<li><a href="./curry" title="_.curry(func, [arity=func.length])">curry</a></li>
<li><a href="./curryRight" title="_.curryRight(func, [arity=func.length])">curryRight</a></li>
<li><a href="./debounce" title="_.debounce(func, [wait=0], [options])">debounce</a></li>
<li><a href="./defer" title="_.defer(func, [args])">defer</a></li>
<li><a href="./delay" title="_.delay(func, wait, [args])">delay</a></li>
<li><a href="./flip" title="_.flip(func)">flip</a></li>
<li><a href="./memoize" title="_.memoize(func, [resolver])">memoize</a></li>
<li><a href="./negate" title="_.negate(predicate)">negate</a></li>
<li><a href="./once" title="_.once(func)">once</a></li>
<li><a href="./overArgs" title="_.overArgs(func, [transforms])">overArgs</a></li>
<li><a href="./partial" title="_.partial(func, [partials])">partial</a></li>
<li><a href="./partialRight" title="_.partialRight(func, [partials])">partialRight</a></li>
<li><a href="./rearg" title="_.rearg(func, indexes)">rearg</a></li>
<li><a href="./rest" title="_.rest(func, [start=func.length-1])">rest</a></li>
<li><a href="./spread" title="_.spread(func)">spread</a></li>
<li><a href="./throttle" title="_.throttle(func, [wait=0], [options])">throttle</a></li>
<li><a href="./unary" title="_.unary(func)">unary</a></li>
<li><a href="./wrap" title="_.wrap(value, wrapper)">wrap</a></li>
</ul></li>
<li id="page-tree-lang" class="folder"><span class="folderPage">Lang</span>
<ul>
<li><a href="./castArray" title="_.castArray(value)">castArray</a></li>
<li><a href="./clone" title="_.clone(value)">clone</a></li>
<li><a href="./cloneDeep" title="_.cloneDeep(value)">cloneDeep</a></li>
<li><a href="./cloneDeepWith" title="_.cloneDeepWith(value, [customizer])">cloneDeepWith</a></li>
<li><a href="./cloneWith" title="_.cloneWith(value, [customizer])">cloneWith</a></li>
<li><a href="./eq" title="_.eq(value, other)">eq</a></li>
<li><a href="./gt" title="_.gt(value, other)">gt</a></li>
<li><a href="./gte" title="_.gte(value, other)">gte</a></li>
<li><a href="./isArguments" title="_.isArguments(value)">isArguments</a></li>
<li><a href="./isArray" title="_.isArray(value)">isArray</a></li>
<li><a href="./isArrayBuffer" title="_.isArrayBuffer(value)">isArrayBuffer</a></li>
<li><a href="./isArrayLike" title="_.isArrayLike(value)">isArrayLike</a></li>
<li><a href="./isArrayLikeObject" title="_.isArrayLikeObject(value)">isArrayLikeObject</a></li>
<li><a href="./isBoolean" title="_.isBoolean(value)">isBoolean</a></li>
<li><a href="./isBuffer" title="_.isBuffer(value)">isBuffer</a></li>
<li><a href="./isDate" title="_.isDate(value)">isDate</a></li>
<li><a href="./isElement" title="_.isElement(value)">isElement</a></li>
<li><a href="./isEmpty" title="_.isEmpty(value)">isEmpty</a></li>
<li><a href="./isEqual" title="_.isEqual(value, other)">isEqual</a></li>
<li><a href="./isEqualWith" title="_.isEqualWith(value, other, [customizer])">isEqualWith</a></li>
<li><a href="./isError" title="_.isError(value)">isError</a></li>
<li><a href="./isFinite" title="_.isFinite(value)">isFinite</a></li>
<li><a href="./isFunction" title="_.isFunction(value)">isFunction</a></li>
<li><a href="./isInteger" title="_.isInteger(value)">isInteger</a></li>
<li><a href="./isLength" title="_.isLength(value)">isLength</a></li>
<li><a href="./isMap" title="_.isMap(value)">isMap</a></li>
<li><a href="./isMatch" title="_.isMatch(object, source)">isMatch</a></li>
<li><a href="./isMatchWith" title="_.isMatchWith(object, source, [customizer])">isMatchWith</a></li>
<li><a href="./isNaN" title="_.isNaN(value)">isNaN</a></li>
<li><a href="./isNative" title="_.isNative(value)">isNative</a></li>
<li><a href="./isNil" title="_.isNil(value)">isNil</a></li>
<li><a href="./isNull" title="_.isNull(value)">isNull</a></li>
<li><a href="./isNumber" title="_.isNumber(value)">isNumber</a></li>
<li><a href="./isObject" title="_.isObject(value)">isObject</a></li>
<li><a href="./isObjectLike" title="_.isObjectLike(value)">isObjectLike</a></li>
<li><a href="./isPlainObject" title="_.isPlainObject(value)">isPlainObject</a></li>
<li><a href="./isRegExp" title="_.isRegExp(value)">isRegExp</a></li>
<li><a href="./isSafeInteger" title="_.isSafeInteger(value)">isSafeInteger</a></li>
<li><a href="./isSet" title="_.isSet(value)">isSet</a></li>
<li><a href="./isString" title="_.isString(value)">isString</a></li>
<li><a href="./isSymbol" title="_.isSymbol(value)">isSymbol</a></li>
<li><a href="./isTypedArray" title="_.isTypedArray(value)">isTypedArray</a></li>
<li><a href="./isUndefined" title="_.isUndefined(value)">isUndefined</a></li>
<li><a href="./isWeakMap" title="_.isWeakMap(value)">isWeakMap</a></li>
<li><a href="./isWeakSet" title="_.isWeakSet(value)">isWeakSet</a></li>
<li><a href="./lt" title="_.lt(value, other)">lt</a></li>
<li><a href="./lte" title="_.lte(value, other)">lte</a></li>
<li><a href="./toArray" title="_.toArray(value)">toArray</a></li>
<li><a href="./toInteger" title="_.toInteger(value)">toInteger</a></li>
<li><a href="./toLength" title="_.toLength(value)">toLength</a></li>
<li><a href="./toNumber" title="_.toNumber(value)">toNumber</a></li>
<li><a href="./toPlainObject" title="_.toPlainObject(value)">toPlainObject</a></li>
<li><a href="./toSafeInteger" title="_.toSafeInteger(value)">toSafeInteger</a></li>
<li><a href="./toString" title="_.toString(value)">toString</a></li>
</ul></li>
<li id="page-tree-math" class="folder"><span class="folderPage">Math</span>
<ul>
<li><a href="./add" title="_.add(augend, addend)">add</a></li>
<li><a href="./ceil" title="_.ceil(number, [precision=0])">ceil</a></li>
<li><a href="./floor" title="_.floor(number, [precision=0])">floor</a></li>
<li><a href="./max" title="_.max(array)">max</a></li>
<li><a href="./maxBy" title="_.maxBy(array, [iteratee=_.identity])">maxBy</a></li>
<li><a href="./mean" title="_.mean(array)">mean</a></li>
<li><a href="./min" title="_.min(array)">min</a></li>
<li><a href="./minBy" title="_.minBy(array, [iteratee=_.identity])">minBy</a></li>
<li><a href="./round" title="_.round(number, [precision=0])">round</a></li>
<li><a href="./subtract" title="_.subtract(minuend, subtrahend)">subtract</a></li>
<li><a href="./sum" title="_.sum(array)">sum</a></li>
<li><a href="./sumBy" title="_.sumBy(array, [iteratee=_.identity])">sumBy</a></li>
</ul></li>
<li id="page-tree-methods" class="folder"><span class="folderPage">Methods</span>
<ul>
<li><a href="./templateSettings-imports-_" title="_.templateSettings.imports._">templateSettings.imports._</a></li>
</ul></li>
<li id="page-tree-number" class="folder"><span class="folderPage">Number</span>
<ul>
<li><a href="./clamp" title="_.clamp(number, [min], max)">clamp</a></li>
<li><a href="./inRange" title="_.inRange(number, [start=0], end)">inRange</a></li>
<li><a href="./random" title="_.random([min=0], [max=1], [floating])">random</a></li>
</ul></li>
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<ul>
<li><a href="./assign" title="_.assign(object, [sources])">assign</a></li>
<li><a href="./assignIn" title="_.assignIn(object, [sources])">assignIn <span class="aliases">extend</span></a></li>
<li><a href="./assignInWith" title="_.assignInWith(object, sources, [customizer])">assignInWith <span class="aliases">extendWith</span></a></li>
<li><a href="./assignWith" title="_.assignWith(object, sources, [customizer])">assignWith</a></li>
<li><a href="./at" title="_.at(object, [paths])">at</a></li>
<li><a href="./create" title="_.create(prototype, [properties])">create</a></li>
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<li><a href="./defaultsDeep" title="_.defaultsDeep(object, [sources])">defaultsDeep</a></li>
<li><a href="./findKey" title="_.findKey(object, [predicate=_.identity])">findKey</a></li>
<li><a href="./findLastKey" title="_.findLastKey(object, [predicate=_.identity])">findLastKey</a></li>
<li><a href="./forIn" title="_.forIn(object, [iteratee=_.identity])">forIn</a></li>
<li><a href="./forInRight" title="_.forInRight(object, [iteratee=_.identity])">forInRight</a></li>
<li><a href="./forOwn" title="_.forOwn(object, [iteratee=_.identity])">forOwn</a></li>
<li><a href="./forOwnRight" title="_.forOwnRight(object, [iteratee=_.identity])">forOwnRight</a></li>
<li><a href="./functions" title="_.functions(object)">functions</a></li>
<li><a href="./functionsIn" title="_.functionsIn(object)">functionsIn</a></li>
<li><a href="./get" title="_.get(object, path, [defaultValue])">get</a></li>
<li><a href="./has" title="_.has(object, path)">has</a></li>
<li><a href="./hasIn" title="_.hasIn(object, path)">hasIn</a></li>
<li><a href="./invert" title="_.invert(object, [multiVal])">invert</a></li>
<li><a href="./invertBy" title="_.invertBy(object, [iteratee=_.identity])">invertBy</a></li>
<li><a href="./invoke" title="_.invoke(object, path, [args])">invoke</a></li>
<li><a href="./keys" title="_.keys(object)">keys</a></li>
<li><a href="./keysIn" title="_.keysIn(object)">keysIn</a></li>
<li><a href="./mapKeys" title="_.mapKeys(object, [iteratee=_.identity])">mapKeys</a></li>
<li><a href="./mapValues" title="_.mapValues(object, [iteratee=_.identity])">mapValues</a></li>
<li><a href="./merge" title="_.merge(object, [sources])">merge</a></li>
<li><a href="./mergeWith" title="_.mergeWith(object, sources, customizer)">mergeWith</a></li>
<li><a href="./omit" title="_.omit(object, [props])">omit</a></li>
<li><a href="./omitBy" title="_.omitBy(object, [predicate=_.identity])">omitBy</a></li>
<li><a href="./pick" title="_.pick(object, [props])">pick</a></li>
<li><a href="./pickBy" title="_.pickBy(object, [predicate=_.identity])">pickBy</a></li>
<li><a href="./result" title="_.result(object, path, [defaultValue])">result</a></li>
<li><a href="./set" title="_.set(object, path, value)">set</a></li>
<li><a href="./setWith" title="_.setWith(object, path, value, [customizer])">setWith</a></li>
<li><a href="./toPairs" title="_.toPairs(object)">toPairs</a></li>
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<li><a href="./transform" title="_.transform(object, [iteratee=_.identity], [accumulator])">transform</a></li>
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</ul></li>
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<ul>
<li><a href="./templateSettings" title="_.templateSettings">templateSettings</a></li>
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<li><a href="./deburr" title="_.deburr([string=''])">deburr</a></li>
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<li><a href="./escape" title="_.escape([string=''])">escape</a></li>
<li><a href="./escapeRegExp" title="_.escapeRegExp([string=''])">escapeRegExp</a></li>
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<li><a href="./pad" title="_.pad([string=''], [length=0], [chars=' '])">pad</a></li>
<li><a href="./padEnd" title="_.padEnd([string=''], [length=0], [chars=' '])">padEnd</a></li>
<li><a href="./padStart" title="_.padStart([string=''], [length=0], [chars=' '])">padStart</a></li>
<li><a href="./parseInt" title="_.parseInt(string, [radix])">parseInt</a></li>
<li><a href="./repeat" title="_.repeat([string=''], [n=0])">repeat</a></li>
<li><a href="./replace" title="_.replace([string=''], pattern)">replace</a></li>
<li><a href="./snakeCase" title="_.snakeCase([string=''])">snakeCase</a></li>
<li><a href="./split" title="_.split([string=''], [separator], [limit])">split</a></li>
<li><a href="./startCase" title="_.startCase([string=''])">startCase</a></li>
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<li><a href="./template" title="_.template([string=''], [options])">template</a></li>
<li><a href="./toLower" title="_.toLower([string=''])">toLower</a></li>
<li><a href="./toUpper" title="_.toUpper([string=''])">toUpper</a></li>
<li><a href="./trim" title="_.trim([string=''], [chars=whitespace])">trim</a></li>
<li><a href="./trimEnd" title="_.trimEnd([string=''], [chars=whitespace])">trimEnd</a></li>
<li><a href="./trimStart" title="_.trimStart([string=''], [chars=whitespace])">trimStart</a></li>
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<li><a href="./attempt" title="_.attempt(func)">attempt</a></li>
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<li><a href="./noConflict" title="_.noConflict()">noConflict</a></li>
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<li><a href="./overSome" title="_.overSome(predicates)">overSome</a></li>
<li><a href="./property" title="_.property(path)">property</a></li>
<li><a href="./propertyOf" title="_.propertyOf(object)">propertyOf</a></li>
<li><a href="./range" title="_.range([start=0], end, [step=1])">range</a></li>
<li><a href="./rangeRight" title="_.rangeRight([start=0], end, [step=1])">rangeRight</a></li>
<li><a href="./runInContext" title="_.runInContext([context=root])">runInContext</a></li>
<li><a href="./times" title="_.times(n, [iteratee=_.identity])">times</a></li>
<li><a href="./toPath" title="_.toPath(value)">toPath</a></li>
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<div id="content" class="markdown-body">
<div data-render-page="entry"><h2>bindKey <a class="fa-link" href="./bindKey" title="Link to this entry."></a> <a href="https://github.com/lodash/lodash/blob/4.5.0正式版/lodash.src.js#L8475" title="View in source." target="github">source</a> <a href="https://www.npmjs.com/package/lodash.bindkey" title="See the npm package." target="npm">npm</a></h2>
<div class="signature">_.bindKey(object, key, [partials])</div>
<div data-render-html="/bindKey"><p>创建一个函数。
该方法绑定 <code>object[key]</code> 的方法。
任何附加在 <code>_.bindKey</code> 的参数会预设到该绑定函数上。
<br>
<br>
这个方法与 <code>_.bind</code> 的不同之处在于允许重写绑定函数即使它还不存在。
浏览 <a href="http://peter.michaux.ca/articles/lazy-function-definition-pattern" target="_blank">Peter Michaux's article</a>
了解更多详情。
<br>
<br>
这个 <code>_.bindKey.placeholder</code> 的值，默认是以 <code>_</code> 作为附加部分参数的占位符。</p>
</div>
<h3>参数</h3>
<ol>
<li><span class="param-name">object</span> <span class="param-type">(Object)</span> <div data-render-html="/#synthetic"><p>需要绑定函数的对象 </p>
</div></li>
<li><span class="param-name">key</span> <span class="param-type">(string)</span> <div data-render-html="/#synthetic"><p>需要绑定函数对象的键 </p>
</div></li>
<li><span class="param-name">[partials]</span> <span class="param-type">(...*)</span> <div data-render-html="/#synthetic"><p>附加的部分参数 </p>
</div></li>
</ol>
<h3>返回值 <span class="return-type">(Function)</span></h3>
<div class="returns"> <div data-render-html="/#synthetic"><p> 返回新的绑定函数</p>
</div></div>
<h3>示例</h3>
<div data-render-html="/#synthetic"><pre><code class="lang-js"><span class="token keyword" >var</span> object <span class="token operator" >=</span> <span class="token punctuation" >{</span>
<span class="token string" >'user'</span><span class="token punctuation" >:</span> <span class="token string" >'fred'</span><span class="token punctuation" >,</span>
<span class="token string" >'greet'</span><span class="token punctuation" >:</span> <span class="token keyword" >function</span><span class="token punctuation" >(</span>greeting<span class="token punctuation" >,</span> punctuation<span class="token punctuation" >)</span> <span class="token punctuation" >{</span>
<span class="token keyword" >return</span> greeting <span class="token operator" >+</span> <span class="token string" >' '</span> <span class="token operator" >+</span> <span class="token keyword" >this</span><span class="token punctuation" >.</span>user <span class="token operator" >+</span> punctuation<span class="token punctuation" >;</span>
<span class="token punctuation" >}</span>
<span class="token punctuation" >}</span><span class="token punctuation" >;</span>
<span class="token keyword" >var</span> bound <span class="token operator" >=</span> _<span class="token punctuation" >.</span><span class="token function" >bindKey</span><span class="token punctuation" >(</span>object<span class="token punctuation" >,</span> <span class="token string" >'greet'</span><span class="token punctuation" >,</span> <span class="token string" >'hi'</span><span class="token punctuation" >)</span><span class="token punctuation" >;</span>
<span class="token function" >bound</span><span class="token punctuation" >(</span><span class="token string" >'!'</span><span class="token punctuation" >)</span><span class="token punctuation" >;</span>
<span class="token comment" spellcheck="true">// => 'hi fred!'</span>
object<span class="token punctuation" >.</span>greet <span class="token operator" >=</span> <span class="token keyword" >function</span><span class="token punctuation" >(</span>greeting<span class="token punctuation" >,</span> punctuation<span class="token punctuation" >)</span> <span class="token punctuation" >{</span>
<span class="token keyword" >return</span> greeting <span class="token operator" >+</span> <span class="token string" >'ya '</span> <span class="token operator" >+</span> <span class="token keyword" >this</span><span class="token punctuation" >.</span>user <span class="token operator" >+</span> punctuation<span class="token punctuation" >;</span>
<span class="token punctuation" >}</span><span class="token punctuation" >;</span>
<span class="token function" >bound</span><span class="token punctuation" >(</span><span class="token string" >'!'</span><span class="token punctuation" >)</span><span class="token punctuation" >;</span>
<span class="token comment" spellcheck="true">// => 'hiya fred!'</span>
<span class="token comment" spellcheck="true">// 使用了占位符</span>
<span class="token keyword" >var</span> bound <span class="token operator" >=</span> _<span class="token punctuation" >.</span><span class="token function" >bindKey</span><span class="token punctuation" >(</span>object<span class="token punctuation" >,</span> <span class="token string" >'greet'</span><span class="token punctuation" >,</span> _<span class="token punctuation" >,</span> <span class="token string" >'!'</span><span class="token punctuation" >)</span><span class="token punctuation" >;</span>
<span class="token function" >bound</span><span class="token punctuation" >(</span><span class="token string" >'hi'</span><span class="token punctuation" >)</span><span class="token punctuation" >;</span>
<span class="token comment" spellcheck="true">// => 'hiya fred!'</span>
</code></pre>
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