Archive
2024
Sep
- 19Baekjun 10171, Cat (with.Java)
- 18Baekjun 1008, The question of dividing A and B
- 17Baekjun 1000, A+B question (with.Java)
- 16About index
- 15About the concept and type of optimizer
- 14About Triggers
- 13About storage modules and PL/SQL
- 11About Procedural SQL
- 10About the set operator in the DB
- 09About the operator type of DB
- 07About the nature of the transaction
- 05About SQL Concepts and Types
- 04About DB and DBMS
- 03About Distributed DB
- 01About DB Table Segmentation
Aug
- 31About semi-normalization techniques
- 30About Normalization and Semi-Normalization
- 29About performance data modeling
- 28About SQL Identifier Features
- 27About SQL Identifiers
- 26About SQL Relationships
- 25About Attributes
- 24About the characteristics of Entity
- 23About the characteristics of Entity
- 22About Entity
- 21About the elements of a good data model
- 20About data model notation
- 19About three elements of data modeling
- 18About Data Independence Factors
- 17About data modeling techniques and tools
- 16About Data Modeling
- 15Make a big number (with.Java)
- 14Joystick (with.Java)
- 13gym clothes (with.Java)
- 12Vowel dictionary (with.Java)
- 11Dividing the grid into two (with.Java)
- 10Fatigue (with.Java)
- 09Carpet (with.Java)
- 08Finding prime numbers (with.Java)
- 07Mock test (with.Java)
- 06Minimum rectangle (with.Java)
- 05H-Index (with.Java)
- 04About the indicators of association analysis
- 03About the association analysis
- 02About SOM
- 01About mixed distribution clusters
Jul
- 31About K-means clustering
- 30About Distance Measurement and Hierarchical Cluster Analysis
- 29About Cluster Analysis
- 28About the classification model evaluation index
- 27About KNN and SVM
- 26About artificial neural networks
- 25About the ensemble
- 24About decision trees
- 23About logistic regression
- 22About data division
- 21About the concept and types of structured data mining
- 20About decomposition time series
- 19About time series analysis
- 18About correlation analysis in multivariate analysis
- 17About multidimensional scaling and principal component analysis
- 16About regression model testing and optimal search methods
- 15About assumptions and types of regression analysis
- 14About regression analysis
- 13About hypothesis testing
- 12About types and estimation of probability distributionsAbout types and estimation of probability distributions
- 11About basic probability theory
- 10About kurtosis and skewness
- 09About data scale classification and basic statistics
- 08About sampling methods in statistics
- 07About searching for missing values ββand outliers
- 06About EDA
- 05About data preprocessing
- 03About data preprocessing packages in R
- 02About establishing a governance system
- 01About the analysis master plan
Jun
- 30About project management measures
- 29About how to discover tasks
- 28About data analysis methodology
- 27About data analysis planning
- 26About de-identification of personal information
- 25About the change in the value paradigm of big data
- 24About the capabilities of a data scientist
- 23Data Science Definition
- 22About big data analysis strategy
- 21About big data analysis techniques
- 20About types of future big data
- 19About risk factors and control measures in big data
- 18About BM of big data
- 17About calculating the value of big data
- 16About big data
- 15About DW and Data Lake
- 14About the types of databases companies use
- 13About database components and design procedures
- 12About the definition and characteristics of database
- 11About the DIKW pyramid and data units
- 10About understanding data
- 09Largest number (with. Java)
- 08Kth number (with.Java)
- 07More Spicy (with.Java)
- 06Function development (with.Java)
- 05I hate same numbers (with.Java)
- 04Best Album (with.Java)
- 03Costume (with.Java)
- 02Phone number list (with.Java)
- 01Athletes who did not finish the race (with.Java)
May
- 31Phoneketmon (with.Java)
- 29Number to come next (with.Java)
- 28Sum of consecutive numbers (with.Java)
- 27Paper Cutting (with.Java)
- 26String push (with.Java)
- 25Number of k (with.Java)
- 24Making B with A (with.Java)
- 23Binary addition (with.Java)
- 21Chicken Coupon (with.Java)
- 20log-in succeed? (with Java)
- 19Babble 1 (with.Java)
- 18Ranking (with. Java)
- 17Unusual sorting (with.Java)
- 16Determining finite decimal numbers (with.Java)
- 15Length of overlapping line segments (with.Java)
- 14Parallel (with.Java)
- 13Cursed number 3 (with.Java)
- 12Alien language dictionary (with.Java)
- 11Triangle completion condition 2 (with.Java)
- 09Safe zone (with.Java)
- 07Addition of hidden numbers 2 (with.Java)
- 06Adding polynomials (with.Java)
Apr
- 30Creating maximum value 2 (with.Java)
- 29Character coordinates (with.Java)
- 28Find the area of a rectangle (with.Java)
- 27A person taller than a shrew (with.Java)
- 26Count duplicate numbers (with.Java)
- 25Number of 7 (with.Java)
- 24Cut and save as array (with.Java)
- 23Sorting strings 2 (with.Java)
- 22Bacterial growth (with.Java)
- 21Determining the square number (with.Java)
- 20String within a string (with, Java)
- 19Adding digits (with.Java)
- 18OX Quiz (with.Java)
- 17About UML (Unified Modeling Language)
- 16About network security solutions
- 15About log analysis
- 14About security architecture and framework
- 13About server authentication
- 10About service attacks and response methods
- 09About encryption
- 08About encapsulation and access specifiers
- 07About code errors and stack guard
- 06About inappropriate exception handling
- 05About the importance and risks of security
- 04About input data verification and expression
- 03About building software development security
- 02About recovery and parallel control
- 01About deadlocks and resolution techniques
Mar
- 31About route and traffic control
- 30About building a network
- 29About new network technologies
- 28About the framework
- 27About tailoring development methodology
- 26About software development standards
- 25About development methodology decisions
- 24About software development methodology approaches
- 23About bottom-up cost estimating techniques
- 22About the developmental trends in S/W engineering
- 21About project schedule planning and management methods
- 20About software development cost estimation using mathematical estimation techniques
- 19About the basic syntax of Python
- 18About TCP/IP protocol
- 17About the OSI Reference Model
- 16About basic commands for each operating system
- 15About scheduling algorithms and operating principles
- 14Concepts and features of UNIX, Linux, and macOS operating systems
- 13About memory management overview, implementation techniques, and page replacement algorithm
- 12About scripting languages and libraries
- 11About loops, arrays, and strings (with.Java)
- 10About types, variables, and operators in Java
- 09About procedures and triggers
- 08About Domain-Specific Language (DCL)
- 07About Domain-Specific Language (DML)
- 06About Domain-Specific Language (DDL)
- 05Creating maximum value 1 (with.Java)
- 04Choosing a multiple of n (with.Java)
- 03Finding numbers (with.Java)
- 02Similarity of arrays (with.Java)
- 01Calculating strings (with.Java)
Feb
- 29Find largest number (with.Java)
- 28Letter Problem (with.Java)
- 27Characters that appear only once (with.Java)
- 26Changing index (with.Java)
- 25Finding divisors (with.Java)
- 24Convert text numbers to integer (with.Java)
- 23Uppercase and lowercase letters (with.Java)
- 22Decryption (with.Java)
- 21Close number(with.Java)
- 20369 games (with.Java)
- 19Control 'Z' (with. Java)
- 18Remove duplicate characters (with.Java)
- 17Length of array elements (with. Java)
- 16Addition of hidden numbers 1 (with.Java)
- 15Prime factorization (Java, HashSet, ArrayList, Set, List)
- 14Removing vowels (with. Java)
- 13Factorial (with.Java)
- 12Sorting strings 1 (with.Java)
- 11Find composite number (with.Java)
- 10Number of dice (with.Java)
- 09Rotating an array (with.Java)
- 08Throwing a ball (with.Java)
- 07Finding the location of a point (with.Java)
- 06Making it two-dimensional (with.Java)
- 05Morse Code 1 (with.Java)
- 04Number of ways to divide beads (with.Java)
- 03Print age (with.Java)
- 02Iced Americano (with.Java)
- 01Rock, Paper, Scissors (with.Java)
Jan
- 31Get a discount at a clothing store (with.Java)
- 30About understanding data formats in APIs
- 29About JavaScript module system comparison
- 28About Homebrew
- 27About DSL(Domain Specific Language)
- 26Maven and Gradle - A Comparison of Tools for Building Java Projects
- 25About Open API
- 24About Binary Search
- 23About Counting Sort
- 22About Merge Sort
- 21About the Greedy Strategy
- 20About transparent proxy
- 19About Swift Syntax 5 (Frequently Used Functions in Set Types)
- 18About Swift syntax 4 (frequently used functions in Array type)
- 17About Swift Syntax 3 (Frequently used functions on Integer, String)
- 16About Swift Syntax 2 (Type)
- 15About Swift Syntax 1 (Declarations)
- 14About introducing multiple functions for array control
- 13About multiple functions for string control
- 12About converting strings to arrays
- 11About package.json
- 10About Forward proxy and Reverse proxy
- 09μΊμ λ μ μ λνμ¬
- 08Average value of an array (with.Java)
- 07Sharing a Pizza 3 (with.Java)
- 06Sharing a Pizza 2 (with.Java)
- 05Sharing a Pizza 1 (with.Java)
- 04Ant Army (with. Java)
- 03Number of order pairs (with.Java)
- 02About Generic (with. Java)
- 01Order of Care (with.Java)
2023
Dec
- 31A short retrospective on 2023 and the age of exoplanets (with.Java)
- 29Removing Specific Characters (with.Java)
- 28I hate even numbers (with.Java)
- 23Finding the Lowest Common Denominator (with.Java)
- 22Array Truncation (with.Java)
- 21Finding the Median (with.Java)
- 20Doubling an Array (with.Java)
- 19About adding fractions (extended)
- 18Addition of Fractions (with.Java)
- 13Division of two numbers (with.Java)
- 12About firewalls
- 11About access lines
- 10Diagonalizing a Two-Dimensional Array (with.Java)
- 09Make it square (with.Java)
- 06Create with l (with.Java)
- 05Spiralizing integers (with.Java)
- 04Converting a sequence to meet a condition 3 (with.Java)
- 03Special two-dimensional array 2 (with.Java)
- 02Special two-dimensional array 1 (with.Java)
- 01Substring 2 (with.Java)
Nov
- 30Dice Game 1 (with.Java)
- 29Coffee Errand (with.Java)
- 28Enlarge Picture (with.Java)
- 27Compare Dates (with.Java)
- 26Find an integer (with.Java)
- 25Tail String (with.Java)
- 24Check if it's a substring (with.Java)
- 23Deleting Elements of an Array (with.Java)
- 22Difference between int and long and about BigInteger (with.Java)
- 21Automated crypto trading bot implementation 6 (with.Upbit Open API)
- 20Automated crypto trading bot implementation 5 (with.Upbit Open API)
- 19Automated crypto trading bot implementation 4 (with.Upbit Open API)
- 18Automated crypto trading bot implementation 3 (with.Upbit Open API)
- 17Automated crypto trading bot implementation 2 (with.Upbit Open API)
- 16Automated crypto trading bot implementation 1 (with.Upbit Open API)
- 15Convert to String (with.Java)
- 14Sum of two numbers (with.Java)
- 130 off (with.Java)
- 12Count how many times a string occurs (with.Java)
- 11Find the longest substring ending in a specific string (with.Java)
- 10Convert a string to an integer (with.Java)
- 09National Competition Selection Test (with.Java)
- 08Sum of String Integers (with.Java)
- 07Integer parts (with.Java)
- 06Back to Top 5 (with.Java)
- 05Back to 5th (with.Java)
- 04String Case Conversion in Arrays (with.Java)
- 03String Concatenation (with.Java)
- 02Performing different operations on the length of an array (with.Java)
- 01Comparing Arrays (with.Java)
Oct
- 31About HashMap(with.Java)
- 30Comparing Arrays (with.Java)
- 29Draw K numbers at random (with.Java)
- 28Add as many elements of an array (with.Java)
- 27Creating Arrays 6 (with.Java)
- 26Make the length of an array a power of two (with.Java)
- 25Adding to and deleting from an empty array (with.Java)
- 24Delimiting Spaces 1 (with.Java)
- 23Find String Replace (with.Java)
- 22Three delimiters (with.Java)
- 21Count between x (with.Java)
- 20Delimiting Spaces 2 (with.Java)
- 19About implementing rny_string (with.Java)
- 18Why StringBuilder is efficient
- 17Truncate and Sort Strings (with.Java)
- 16Calculate a simple expression (with.Java)
- 15Removing "ad" (with.Java)
- 14Emphasize A (with.Java)
- 13Capitalize (with.Java)
- 12Capitalize specific characters (with.Java)
- 11Lowercase (with.Java)
- 10Find the desired string (with.Java)
- 09Make it 1 (with.Java)
- 08Transforming a sequence based on conditions 2 (with.Java)
- 07Transforming a sequence based on conditions 1, How to control an array based on conditions (with.Java)
- 06Querying sequences and intervals 1 (with.Java)
- 05Add until n is greater than (with.Java)
- 04Length-based operations (with.Java)
- 03How to truncate a given list of strings by 5 characters, collecting only the first character and outputting it to an array.
- 02ToDo List (with.Java)
- 01Up to the nth element (with.Java)
Sep
- 30Odd vs Even (with.Java)
- 29Elements at n intervals (with.Java)
- 28Left Right (with.Java)
- 27Reorder (with.Java)
- 26Starting with the n th element (with.Java)
- 25Slice an Array (with.Java)
- 24How to find a region of 2 (with.Java)
- 23Creating an Array 3 (with.Java)
- 22The first negative number that comes up (with.Java)
- 21List Truncation, how to truncate and assign to an array for a given integer and list (with.Java)
- 20Countdown (with.Java)
- 19How to find the nearest 1, output the number that meets a condition via a given index (with.Java)
- 18About implementing string flipping (with.Java)
- 17Clearing characters, how to clear the index corresponding to a value present in an array from a string (with.Java)
- 16qr code(with.Java)
- 15Create an array1 (with.Java)
- 14About Vertical Reading (with.Java)
- 13About implementing character counting (with.Java)
- 12About the Check Suffix Implementation (with.Java)
- 11Implementing Flipping a String Multiple Times (with.Java)
- 10How to concatenate substring to create a string (with.Java)
- 09For outputting n characters after a string (with.Java)
- 08Check if it's a prefix (with.Java)
- 07How to concatenate substring to create a string (with.Java)
- 06About Implementing Suffix Arrays (with.Java)
- 05About implementing counting up (with.Java)
- 04Creating a Collatz Sequence (with.Java)
- 03For the rest of the implementation methods divided by 9 (with. Java)
- 02How to Control Result Values by Multiple Conditions (Dice Game 3, with.Java)
- 01How to concatenate letters to create a string (with.Java)
Aug
- 31Querying Sequences and Intervals 2(with.Java)
- 30Implementing arrays for given conditions (with.Java)
- 29About the difference between Scale-Out and Scale-Up
- 28How to control a sequence with an interval query 1(with.Java)
- 27How to return different values based on flags (with.Java)
- 26How to get concatenated counts, sort by conditions, and get concatenated counts (with.Java)
- 25About Dice Games (with.Java)
- 24How to implement condition strings (with.Java)
- 23Adding Specific Ports of an Equality Sequence (with.Java)
- 22How to handle operations under different conditions (with.Java)
- 21How to return different values for different sips (with.Java)
- 20About Finding Common Multiples (with.Java)
- 19About finding multiples of n (with. Java)
- 18About Merge Larger(with.Java)
- 17Comparing Two Number Operations (with.Java)
- 16About overlapping strings(with. Java)
- 15About comparing the lengths of arrays (with.Java)
- 14The difference between an Array and a List (with.Java)
- 13How to convert an array of strings to a string (with.Java)
- 12About Scanner
- 11About Swift
- 10About ES6 syntax 4 (Template literals, Object initializer)
- 09About ES6 syntax 3 (repeat function)
- 08About ES6 syntax 2 (Arrow Function)
- 07About ES6 syntax 1 (let and const)
- 06About the difference between URLs and URIs
- 05About Vite
- 04About iterator
- 03About closure
- 02About gradle
- 01About the IDE(for Android apps)
Jul
- 31About web sockets(3)
- 30About web sockets(2)
- 29About Web Sockets (1)
- 28About choosing a language for AOS development
- 27About browser
- 26About cookies and sessions
- 25About implementing the hashtag feature
- 24About web framework(3)
- 23About web framework(2)
- 22About web framework(1)
- 21About using classes in JS
- 20About Promise
- 19About type conversion
- 18About ES Lint
- 17λ°μ΄ν° λ²νΌ(Data Buffer)μ λνμ¬
- 16About bundler(2)
- 15About bundler(1)
- 14About ES(ECMAScript)
- 13About web cache
- 12About DNS(Domain Name System)
- 11About TS & TSX
- 10About design pattern creational(3)
- 09About design pattern creational(2)
- 08About design pattern creational(1)
- 07About design pattern
- 06About submodule
- 05About jekyll
- 04About node.js
- 03About parser
- 02About db separation(2)
- 01About db separation(1)
Jun
- 30About useQuery
- 29About local & session storage
- 28About fast API
- 27About RDB and NoSQL
- 26About serverless function
- 25About parameter argument
- 24About edge function
- 23About image compression(2)
- 22About image compression(1)
- 21About Package manager
- 20About React hooks
- 19About sudo(2)
- 18About sudo(1)
- 17About HTTP Request
- 16The most common way to download a file using JS in a web browser using the a tag.
- 15About useInfiniteQuery
- 14About CORS(3)
- 13About CORS(2)
- 12About CORS(1)
- 11About Context Provider