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20220330_Vote/Ewide.Web.Entry/wwwroot/lib/xe-utils/uniq.js

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+var each = require('./each')
+var includes = require('./includes')
+var isFunction = require('./isFunction')
+var property = require('./property')
+
+/**
+ * 数组去重
+ * 
+ * @param {*} array  数组
+ * @param {*} iterate 字段或回调
+ * @param {*} context 
+ * @returns 
+ */
+function uniq (array, iterate, context) {
+  var result = []
+  if (iterate) {
+    if (!isFunction(iterate)) {
+      iterate = property(iterate)
+    }
+    var val, valMap = {}
+    each(array, function (item, key) {
+      val = iterate.call(context, item, key, array)
+      if (!valMap[val]) {
+        valMap[val] = 1
+        result.push(item)
+      }
+    })
+  } else {
+    each(array, function (value) {
+      if (!includes(result, value)) {
+        result.push(value)
+      }
+    })
+  }
+  return result
+}
+
+module.exports = uniq