70 lines
1.7 KiB
Markdown
70 lines
1.7 KiB
Markdown
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---
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title: Using Objects for Lookups
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localeTitle: استخدام كائنات لعمليات البحث
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---
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## استخدام كائنات لعمليات البحث
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هنا هو المثال:
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`// Setup
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function phoneticLookup(val) {
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var result = "";
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// Only change code below this line
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switch(val) {
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case "alpha":
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result = "Adams";
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break;
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case "bravo":
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result = "Boston";
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break;
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case "charlie":
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result = "Chicago";
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break;
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case "delta":
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result = "Denver";
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break;
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case "echo":
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result = "Easy";
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break;
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case "foxtrot":
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result = "Frank";
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}
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// Only change code above this line
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return result;
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}
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// Change this value to test
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phoneticLookup("charlie");
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`
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وإليك الحل: نحن لا نغير أي شيء هنا:
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`function phoneticLookup(val) {
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var result = "";
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`
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نحن بحاجة إلى تحويل بيان التبديل إلى كائن. نقل كل قيم `case` إلى خصائص الكائن:
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``function phoneticLookup(val) {
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var result = "";
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var lookup = {
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"alpha": "Adams",
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"bravo": "Boston",
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"charlie": "Chicago",
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"delta": "Denver",
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"echo": "Easy",
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"foxtrot": "Frank"
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};
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```
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After converting our case statements into object properties you can make use of the variable `result` to let the function return the correct value.
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``
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جافا سكريبت result = lookup \[val\]؛ \`\` \`
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تشغيل الكود في [repl.it.](https://repl.it/@AdrianSkar/Using-objects-for-lookups)
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### مصادر
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* ["أساسيات كائن جافا سكريبت" - _مرجع جافا سكريبت MDN_](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Basics)
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