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Simplify isType methods.

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This commit is contained in:
John-David Dalton
2017-02-09 23:14:09 -08:00
parent d460c42230
commit d931d6e8e8
7 changed files with 15 additions and 24 deletions
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8
isArguments.js
View File

@@ -1,5 +1,4 @@
import baseGetTag from './.internal/baseGetTag.js'
import isObjectLike from './isObjectLike.js'
import getTag from './.internal/getTag.js'
/**
* Checks if `value` is likely an `arguments` object.
@@ -7,8 +6,7 @@ import isObjectLike from './isObjectLike.js'
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
* else `false`.
* @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
* @example
*
* isArguments(function() { return arguments }())
@@ -18,7 +16,7 @@ import isObjectLike from './isObjectLike.js'
* // => false
*/
function isArguments(value) {
return isObjectLike(value) && baseGetTag(value) == '[object Arguments]'
return typeof value == 'object' && value != null && getTag(value) == '[object Arguments]'
}
export default isArguments

3
isSet.js
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@@ -1,5 +1,4 @@
import getTag from './.internal/getTag.js'
import isObjectLike from './isObjectLike.js'
import nodeUtil from './.internal/nodeUtil.js'
/* Node.js helper references. */
@@ -22,6 +21,6 @@ const nodeIsSet = nodeUtil && nodeUtil.isSet
*/
const isSet = nodeIsSet
? value => nodeIsSet(value)
: value => isObjectLike(value) && getTag(value) == '[object Set]'
: value => typeof value == 'object' && value != null && getTag(value) == '[object Set]'
export default isSet

7
isString.js
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@@ -1,5 +1,4 @@
import baseGetTag from './.internal/baseGetTag.js'
import isObjectLike from './isObjectLike.js'
import getTag from './.internal/getTag.js'
/**
* Checks if `value` is classified as a `String` primitive or object.
@@ -17,8 +16,8 @@ import isObjectLike from './isObjectLike.js'
* // => false
*/
function isString(value) {
return typeof value == 'string' ||
(!Array.isArray(value) && isObjectLike(value) && baseGetTag(value) == '[object String]')
const type = typeof value
return type == 'string' || (type == 'object' && value != null && !Array.isArray(value) && getTag(value) == '[object String]')
}
export default isString

7
isSymbol.js
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@@ -1,5 +1,4 @@
import baseGetTag from './.internal/baseGetTag.js'
import isObjectLike from './isObjectLike.js'
import getTag from './.internal/getTag.js'
/**
* Checks if `value` is classified as a `Symbol` primitive or object.
@@ -17,8 +16,8 @@ import isObjectLike from './isObjectLike.js'
* // => false
*/
function isSymbol(value) {
return typeof value == 'symbol' ||
(isObjectLike(value) && baseGetTag(value) == '[object Symbol]')
const type = typeof value
return type == 'symbol' || (type == 'object' && value != null && getTag(value) == '[object Symbol]')
}
export default isSymbol

6
isTypedArray.js
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@@ -1,6 +1,4 @@
import baseGetTag from './.internal/baseGetTag.js'
import isLength from './isLength.js'
import isObjectLike from './isObjectLike.js'
import getTag from './.internal/getTag.js'
import nodeUtil from './.internal/nodeUtil.js'
/** Used to match `toStringTag` values of typed arrays. */
@@ -26,6 +24,6 @@ const nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray
*/
const isTypedArray = nodeIsTypedArray
? value => nodeIsTypedArray(value)
: value => isObjectLike(value) && isLength(value.length) && reTypedTag.test(baseGetTag(value))
: value => typeof value == 'object' && value != null && reTypedTag.test(getTag(value))
export default isTypedArray

3
isWeakMap.js
View File

@@ -1,5 +1,4 @@
import getTag from './.internal/getTag.js'
import isObjectLike from './isObjectLike.js'
/**
* Checks if `value` is classified as a `WeakMap` object.
@@ -17,7 +16,7 @@ import isObjectLike from './isObjectLike.js'
* // => false
*/
function isWeakMap(value) {
return isObjectLike(value) && getTag(value) == '[object WeakMap]'
return typeof value == 'object' && value != null && getTag(value) == '[object WeakMap]'
}
export default isWeakMap

5
isWeakSet.js
View File

@@ -1,5 +1,4 @@
import baseGetTag from './.internal/baseGetTag.js'
import isObjectLike from './isObjectLike.js'
import getTag from './.internal/getTag.js'
/**
* Checks if `value` is classified as a `WeakSet` object.
@@ -17,7 +16,7 @@ import isObjectLike from './isObjectLike.js'
* // => false
*/
function isWeakSet(value) {
return isObjectLike(value) && baseGetTag(value) == '[object WeakSet]'
return typeof value == 'object' && value != null && getTag(value) == '[object WeakSet]'
}
export default isWeakSet