refactor: simplify code of removeDuplicateNodes method (#461)

lusarz · eddyerburgh · commit a0edc22d74fc · 2018-03-10T09:53:46.000Z
diff --git a/packages/test-utils/src/find-vnodes.js b/packages/test-utils/src/find-vnodes.js
@@ -24,14 +24,7 @@ function findAllVNodes (vnode: VNode, nodes: Array<VNode> = []): Array<VNode> {
 }
 
 function removeDuplicateNodes (vNodes: Array<VNode>): Array<VNode> {
-  const uniqueNodes = []
-  vNodes.forEach((vNode) => {
-    const exists = uniqueNodes.some(node => vNode.elm === node.elm)
-    if (!exists) {
-      uniqueNodes.push(vNode)
-    }
-  })
-  return uniqueNodes
+  return vNodes.filter((vNode, index) => index === vNodes.findIndex(node => vNode.elm === node.elm))
 }
 
 function nodeMatchesRef (node: VNode, refName: string): boolean {

Original file line number	Diff line number	Diff line change
`@@ -24,14 +24,7 @@ function findAllVNodes (vnode: VNode, nodes: Array<VNode> = []): Array<VNode> {`
`24`	`24`	`}`
`25`	`25`
`26`	`26`	`function removeDuplicateNodes (vNodes: Array<VNode>): Array<VNode> {`
`27`		`- const uniqueNodes = []`
`28`		`- vNodes.forEach((vNode) => {`
`29`		`- const exists = uniqueNodes.some(node => vNode.elm === node.elm)`
`30`		`- if (!exists) {`
`31`		`- uniqueNodes.push(vNode)`
`32`		`- }`
`33`		`- })`
`34`		`- return uniqueNodes`
	`27`	`+ return vNodes.filter((vNode, index) => index === vNodes.findIndex(node => vNode.elm === node.elm))`
`35`	`28`	`}`
`36`	`29`
`37`	`30`	`function nodeMatchesRef (node: VNode, refName: string): boolean {`