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24012 silly preinstall [email protected] | |
24013 info lifecycle [email protected]~preinstall: [email protected] | |
24014 silly preinstall [email protected] | |
24015 info lifecycle [email protected]~preinstall: [email protected] | |
24016 silly preinstall [email protected] | |
24017 info lifecycle [email protected]~preinstall: [email protected] | |
24018 silly preinstall [email protected] | |
24019 info lifecycle [email protected]~preinstall: [email protected] | |
24020 silly preinstall [email protected] | |
24021 info lifecycle [email protected]~preinstall: [email protected] |
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https://repl.it/@jgrizzled/Creating-arrays-drill | |
https://repl.it/@jgrizzled/Adding-array-items-drills | |
https://repl.it/@jgrizzled/Accessing-array-items-drill | |
https://repl.it/@jgrizzled/Array-length-and-access-drill | |
https://repl.it/@jgrizzled/Array-copying-I-drill |
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https://repl.it/@jgrizzled/min-and-max-without-sort-drill | |
https://repl.it/@jgrizzled/average-drill | |
https://repl.it/@jgrizzled/fizzbuzz-drill-js | |
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1. What is scope? Your explanation should include the idea of global vs. block scope. | |
Scope refers to the function or block level in which a particular a variable is defined. The global scope refers to variables defined at the top level of the program, I.E. not inside of any function or code block. Block scope refers to variable definitions contained in curly brackets { }, which are not accessible from outer/upper scopes and are deleted from memory upon completion of the code block or function. | |
2. Why are global variables avoided? | |
Use of global variables can excessively increase the complexity, unpredictability, and memory footprint of code. Functions whose output is purely determined by the input are easier to test and debug compared to functions whose behavior depends on unpredictable global variable state. | |
3. Explain JavaScript's strict mode |
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https://repl.it/@jgrizzled/Object-creator-drill | |
https://repl.it/@jgrizzled/Object-updater-drill | |
https://repl.it/@jgrizzled/Self-reference-drill | |
https://repl.it/@jgrizzled/Deleting-keys-drill | |
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https://repl.it/@jgrizzled/Make-student-reports-drill | |
https://repl.it/@jgrizzled/Enroll-in-summer-school-drill | |
https://repl.it/@jgrizzled/find-by-id-drill | |
https://repl.it/@jgrizzled/validate-object-keys-drill |
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Quiz Topic: Blockchains/Cryptocurrency | |
--- Quiz Questions --- | |
Q1: Which best describes a blockchain? | |
A1: A linked list | |
A2: A chronologically orderded ledger of blocks of data | |
A3: A decentralized currency | |
A4: A database | |
Answer: A2. A blockchain is a data structure which consists of blocks of data, such as transactions. Each block contains a reference to the previous block, such that it is guaranteed to have been created after the previous block, otherwise the reference to the previous block could not be created. This provides a good way to track transactions or state in a distributed network, with each block being a snapshot of time. Earlier history cannot be altered because that would alter the previous block references in every following block. Many decentralized cryptocurrency networks use blockchains to store the state of the transaction ledger. |
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Live site: https://jgrizzled.github.io/blockchain-quiz-app/ | |
Github: https://github.com/jgrizzled/blockchain-quiz-app |
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Headline: | |
Hi, I'm Justin | |
Full stack web developer and blockchain enthusiast in Phoenix, AZ | |
Projects: | |
- Blockchain Quiz App | |
This browser-based quiz app tests your knowledge on blockchain fundamentals. It utilizes HTML5, CSS3, and jQuery to generate a responsive single-page web app for both mobile and desktop. | |
Github Repo: https://github.com/jgrizzled/blockchain-quiz-app | |
Live demo: https://jgrizzled.github.io/blockchain-quiz-app/ |