Shadowing Practice: TypeScript in 100 Seconds - Learn English Speaking with Video
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TypeScript.
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Validate your JavaScript ahead of time with static type checking.
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JavaScript is a dynamic language where we can do all kinds of crazy things, like reference variables that don't exist or work with objects of an unknown shape.
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The code is interpreted by a browser, but if your code is broken, you won't catch it until runtime when the browser throws an error.
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TypeScript prevents errors like this from ever happening by extending JavaScript with types.
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The language is a strict superset of JavaScript, which means when you open up a TS file, you can write plain JavaScript with all of its extra features being completely optional.
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But notice in the code here how the IDE is providing feedback about using a variable that doesn't exist.
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Instead of fixing this issue weeks later in a stack trace after the company has lost millions of dollars, we can fix it right here, right now.
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The reason we get this instant feedback is because TypeScript behaves like a compiled language, where JavaScript is the compilation target.
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You can run the TypeScript compiler using the tsc command.
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It will take the ts file and and transpile it into vanilla JavaScript.
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And you can choose any flavor of JavaScript you want if you need to target ancient browsers.
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And that means you can use the latest
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and greatest syntax features of JavaScript without having to worry if they'll be supported in an older environment.
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Your TypeScript project will likely have a tsconfig file, which provides an infinite number of ways to customize the behavior of the compiler.
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But the primary goal of TypeScript is to enable static typing.
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One way it achieves that is by allowing you to annotate your code with types.
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We can strongly type a variable using a colon followed by its type, like a string, boolean, or number.
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That's known as an explicit type.
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If we then try to assign its value as the wrong type, we get an error.
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Alternatively, if we set an initial value, it will implicitly infer the type.
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However, there may be cases where you want to opt out of this behavior, in which case you can annotate with the any type.
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That allows you to loosely type or opt out of type checking.
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When working with an array, use brackets to strongly type a list.
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In addition, you can define your own custom types and interfaces, which is especially powerful when working with objects.
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The car interface here defines various types of the properties on an object.
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We can then apply the interface to a plain JavaScript object.
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The beauty of having strongly typed code is that we get autocomplete everywhere in our IDE.
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We don't have to jump back and forth to documentation
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or dig through stack traces to figure out why our code's not working.
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If you like TypeScript as much as I do, consider becoming a pro member at Fireship.io.
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For the next few days, everything will be 40% off, including lifetime memberships.
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Thanks for watching, and I will see you in the next one.
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Bu dersin kelimeleri ve konuşma notları
Bu C1 seviyesindeki konuşma dersi “TypeScript in 100 Seconds” videosuna dayanıyor. En çok tekrarlanan kelimeler: type, Javascript, Typescript, code, object. Bu videoda gölgeleme çalışması için 33 cümle ve 515 kelime var. Konuşma bölümü 2:24 sürüyor. Konuşmacı hızlı konuşuyor, dakikada yaklaşık 215 kelime; bu yüzden birbirine bağlanan ve zayıflayan sesler duyacaksınız. Kelimelerin yalnızca %77’i İngilizcede en sık kullanılan 3.000 kelime arasında, bu yüzden kelime dağarcığı zorlayıcı.
Bu videodaki önemli kelimeler
Videodaki en ileri düzey 13 kelime, telaffuzu ve anlamıyla:
| Kelime | Telaffuz | Anlam |
|---|---|---|
| compiler isim | /kəmˈpaɪlɚ/ | derleyici |
| stack isim | /stæk/ | yığın |
| compile fiil | /kəmˈpaɪl/ | derlemek |
| superset isim | kapsayan küme, kapsayan | |
| syntax isim | /ˈsɪn.tæks/ | sözdizimi, sentaks |
| colon isim | /ˈkoʊ.lən/ | iki nokta üst üste, iki nokta |
| alternatively zarf | /ɔlˈtɝ.nə.tɪv.li/ | alternativ olarak, ya da |
| vanilla isim | /vəˈnɪl.ə/ | vanilya |
| bracket isim | /ˈbɹækɪt/ | ayraç, parantez |
| compilation isim | /ˌkɑm.pɪˈleɪ.ʃən/ | derleme |
| optional sıfat | /ˈɑp.ʃə.nəl/ | ihtiyari, isteğe bağlı |
| behave fiil | /bɪˈheɪv/ | davranmak |
| flavor isim | /ˈfleɪvə/ | çeşni |
Duyacağınız deyimsel fiiller
| Kelime | Anlam |
|---|---|
| figure out fiil | açığa çıkarmak |
Bu videodaki dil bilgisi
Konuşmacının en çok kullandığı yapılar, videodaki sözcüklerin aynısıyla:
| Yapı | Videoda |
|---|---|
| Koşul cümleleri if + cümle, will/would + fiil — bir koşul ve sonucu | if your code is broken, you won't catch |
| Edilgen yapı be + fiilin üçüncü hâli — kimin yaptığı değil, ne olduğu önemli | is interpreted · be supported |
| İlgi cümlecikleri who / which + cümle — bir kişi ya da şey hakkında ek bilgi | JavaScript, which means · interfaces, which is |
Dikkat edilecek telaffuzlar
Konuşmacı don't, doesn't, they'll gibi kısaltılmış biçimleri 5 kez kullanıyor. Bunları duyduğunuz gibi kısa söyleyin.
- “sh” ve “zh” sesleri: compilation /ˌkɑm.pɪˈleɪ.ʃən/, optional /ˈɑp.ʃə.nəl/, documentation /ˌdɑkjəmɛnˈteɪʃən/
- Uzun kelimeler — vurguyu doğru yere koyun: alternatively /ɔlˈtɝ.nə.tɪv.li/, compilation /ˌkɑm.pɪˈleɪ.ʃən/, documentation /ˌdɑkjəmɛnˈteɪʃən/
Türkçe konuşanların zorlandığı sesler:
- Kelime başındaki ünsüz kümesi — araya ünlü eklemeyin: browser /ˈbɹaʊ.zəɹ/, static /ˈstæt.ɪk/, stack /stæk/, bracket /ˈbɹækɪt/, flavor /ˈfleɪvə/
- /æ/ — “e”den daha açık: annotate /ˈæn.ə.teɪt/, static /ˈstæt.ɪk/, stack /stæk/, validate /ˈvæl.ɪ.deɪt/, syntax /ˈsɪn.tæks/
Bu videoyla nasıl çalışılır
- Videonun tamamını konuşmadan bir kez dinleyin ve bilmediğiniz kelimeleri not edin.
- 0,75× hızla başlayın, cümle cümle tekrar edin ve kolaylaşınca normal hıza dönün.
- Kendinizi kaydedin ve orijinaliyle karşılaştırın; compiler, stack, compile gibi kelimelere özellikle dikkat edin.
Gölgeleme Tekniği Nedir?
Gölgeleme, başlangıçta profesyonel tercüman eğitimi için geliştirilen ve çok dilli Dr. Alexander Arguelles tarafından popüler hale getirilen, bilim destekli bir dil öğrenme tekniğidir. Yöntem basit ama güçlüdür: ana dili İngilizce olan bir sesi dinler ve hemen yüksek sesle tekrar edersiniz — konuşmacıyı 1-2 saniye gecikmeyle takip eden bir gölge gibi. Pasif dinleme veya dilbilgisi alıştırmalarının aksine, gölgeleme beyninizi ve ağız kaslarınızı gerçek konuşma kalıplarını eşzamanlı olarak işlemeye ve yeniden üretmeye zorlar. Araştırmalar, telaffuz doğruluğu, tonlama, ritim, bağlı konuşma, dinleme anlama ve konuşma akıcılığını önemli ölçüde geliştirdiğini göstermektedir — bu da onu IELTS Konuşma hazırlığı ve gerçek dünya İngilizce iletişimi için en etkili yöntemlerden biri yapar.