शैडोइंग अभ्यास: How can you generate predictable Random numbers? #javalanguage #javacoding #javatips - वीडियो के साथ अंग्रेजी बोलना सीखें
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Question 398.
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How can you generate repeatable random numbers?
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Short answer.
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A series of random numbers is always repeatable.
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Less short answer.
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When you create an instance of the random class,
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you initialize the series of random numbers that you can get one at a time with the various methods of the class,
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next int, next double and the like.
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You can give a seed when you create this instance and for a given seed you will always get the same series.
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This may be very useful when you want to write tests for instance.
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If you do not provide any seed then the seed is generated from system .nanotime.
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One last word, predictability is a different topic.
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Having non -predictable random series is harder than it seems.
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We can use the SecureRandom class instead of Random, which is the preferred random generator for cryptographic and security applications.
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The series it generates still depends on a seed, but it's harder to predict.
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Vocabulary and speaking notes for this lesson
This video has 15 sentences and 161 words to shadow. The speech runs for 1:10. The speaker talks at a steady 138 words per minute, a comfortable pace for shadowing. 83% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
13 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| generate verb | /ˈd͡ʒɛn.ə.ɹeɪt/ | To bring into being; give rise to. |
| topic noun | /ˈtɑpɪk/ | A subject; a theme; a category or general area of interest. |
| depend verb | /dɪˈpɛnd/ | To be contingent or conditioned; to have something as a necessary condition |
| predict verb | /pɹɪˈdɪkt/ | To make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of… |
| generator noun | /ˈdʒɛnəɹeɪtə(ɹ)/ | An apparatus in which vapour or gas is formed from a liquid or solid by means of heat or chemical process, as a steam boiler, gas retort etc. |
| predictable adjective | /pɹəˈdɪktəbləl/ | Able to be predicted. |
| repeatable adjective | /ɹɪˈpiːtəbəl/ | Able to be repeated. |
| cryptographic adjective | Relating to cryptography. | |
| initialize verb | /ɪˈnɪʃəlaɪz/ | To assign initial values to something. |
| predictability noun | /pɹəˌdɪktəˈbɪlɪti/ | The characteristic of being predictable. |
| random adjective | /ˈɹændəm/ | Occurring for no particular reason; haphazard, unpredictable. |
| instance verb | /ˈɪnstəns/ | To mention as a case or example; to refer to. |
| prefer verb | [pɹɪˈfɝ] | To be in the habit of choosing something rather than something else; to favor; to like better. |
इस वीडियो का व्याकरण
वक्ता जिन संरचनाओं का सबसे अधिक प्रयोग करता है, वीडियो के असली शब्दों के साथ:
| संरचना | वीडियो में |
|---|---|
| Passive voice be + past participle — ज़ोर इस पर कि क्या होता है, न कि कौन करता है | is generated |
| Relative clauses who / which + उपवाक्य — व्यक्ति या वस्तु के बारे में अतिरिक्त जानकारी | Random, which is |
Pronunciation to watch
- Long words — get the stress right: generator /ˈdʒɛnəɹeɪtə(ɹ)/, predictable /pɹəˈdɪktəbləl/, repeatable /ɹɪˈpiːtəbəl/, initialize /ɪˈnɪʃəlaɪz/, predictability /pɹəˌdɪktəˈbɪlɪti/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like generate, topic, depend.
शैडोइंग तकनीक क्या है?
शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।