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Variable scope, closure #150
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| The answer is: **Pete**. | ||
| جواب: **Pete**. | ||
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| A function gets outer variables as they are now, it uses the most recent values. | ||
| یک تابع متغیرهای بیرونی را همانطور که هستند دریافت میکند و از آخرین مقدارها استفاده میکند. | ||
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| Old variable values are not saved anywhere. When a function wants a variable, it takes the current value from its own Lexical Environment or the outer one. | ||
| مقدارهای قدیمی متغیر جایی ذخیره نمیشوند. زمانی که تابعی یک متغیر را میخواهد، مقدار کنونی آن را از محیط لغوی خودش یا محیط بیرونی دریافت میکند. |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,9 @@ | ||
| The answer is: **Pete**. | ||
| جواب: **Pete**. | ||
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| The `work()` function in the code below gets `name` from the place of its origin through the outer lexical environment reference: | ||
| تابع `work()` در کد زیر `name` را از طریق مرجع محیط لغوی بیرونی، از جایی که منشا گرفته است دریافت میکند: | ||
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| So, the result is `"Pete"` here. | ||
| پس اینجا نتیجه `"Pete"` است. | ||
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| But if there were no `let name` in `makeWorker()`, then the search would go outside and take the global variable as we can see from the chain above. In that case the result would be `"John"`. | ||
| اما اگر `let name` در `makeWorker()` وجود نداشت، همانطور که در زنجیره بالا هم میبینیم، سپس جستجو به بیرون میرفت و متغیر گلوبال را دریافت میکرد. در این صورت نتیجه `"John"` میشد. | ||
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| The answer: **0,1.** | ||
| جواب: **0,1.** | ||
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| Functions `counter` and `counter2` are created by different invocations of `makeCounter`. | ||
| تابعهای `counter` و `counter2` با فراخوانیهای متفاوتِ `makeCounter` ساخته شدهاند. | ||
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| So they have independent outer Lexical Environments, each one has its own `count`. | ||
| پس آنها محیطهای لغوی بیرونی مستقل دارند که هر کدام آنها `count` خودش را دارد. |
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,3 @@ | ||
| The result is **an error**. | ||
| نتیجه **یک ارور** است. | ||
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| The function `sayHi` is declared inside the `if`, so it only lives inside it. There is no `sayHi` outside. | ||
| تابع `sayHi` درون `if` تعریف شده است پس فقط درون آن وجود دارد. بیرون از آن `sayHi` نداریم. |
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