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Share and discover code snippetsBind socket to port
This snippet binds a socket to a specified port using the bind function and a sockaddrin structure.
margaretzimmerman
Useful pipe tricks
This snippet demonstrates useful pipe tricks in Bash for chaining commands efficiently.
mklein
Get nested value safely
This TypeScript snippet safely retrieves a nested value from an object without throwing an error if any intermediate property is undefined.
tommy_washington
Reverse a string
This Python snippet reverses a string in place using slicing with a step of negative one.
deanna_avila
constexpr auto factorial
Computes the factorial of a compile-time constant using constexpr for zero overhead.
aellis
Merge dicts safely
This snippet merges two dictionaries, preserving existing keys and avoiding overwrites, using {dict1, dict2} with dict2 taking priority.
That unpacking trick is clean but only works in Python 3.5+. I once spent an hour debugging a production script that silently dropped keys because someone used {a, b} on a Python 3.4 runtime.
ryan_adams
Find duplicates using GROUP BY
Groups rows by a column and filters for those with more than one occurrence to find duplicate values.
aellis
Flexbox Centering Trick
This CSS snippet centers any child element both vertically and horizontally within its parent using flexbox.
mklein
Generate date series
Generate a sequence of dates within a specified range for use in reporting or data analysis.
mkim
Parse hex string to bytes
Converts a hexadecimal string into a byte array for efficient data handling in C.
jenna
Calculate array length
This snippet determines the number of elements in a C array by dividing the total array size by the size of a single element.
shawn_henry99
Default From/Into impls
Default From and Into implementations in Rust allow automatic bidirectional conversions between compatible types, reducing boilerplate code.
davidt
Coalesce Null Default
Returns the first non-null value from a list of expressions, using a default if all are null.
vshepard
Ternary null coalescing
Assigns a default value when a variable is null, using PHP's shorter null coalescing operator.
The null coalescing operator (??) works well for undefined keys too, not just null values. In your example, $username ?? 'guest' avoids an undefined index notice if $username isn't set, which the ternary operator (isset($username) ? $username : 'guest') also handles but with more syntax. Just watch for nested coalescing, as it evaluates left to right and can mask deeper null issues in chained calls like $a ?? $b ?? $c.
reginald
Strict Type Predicate
A TypeScript utility that creates a type guard function to verify if a value matches a specific type at runtime, ensuring type safety when working with uncertain data.
angelaa
concurrent HTTP requests
A Go code snippet that fires off multiple HTTP requests in parallel using goroutines and a sync.WaitGroup to handle them concurrently.
joshua
Sort array descending
This Rust code snippet sorts an array in descending order using the sortby method with a comparison closure.
julia
Array destructuring swap
Swaps two variables without a temporary variable using array destructuring.
sarahhall
Center with Flexbox
This CSS snippet centers any child element both horizontally and vertically inside a flex container.
julia
Array Shuffle Fisher Yates
Shuffles an array in place using the Fisher-Yates algorithm for uniform random distribution.
erin1992
Array destructuring swap
Swaps two values without a temporary variable by using array destructuring assignment.
mvargas
Hash String Comparison
Compares two strings by their hash values to check for equality efficiently.
Hashing for equality works great until you hit a collision, and then you're stuck debugging a false positive that looks like a bug in your comparison logic.
mvargas
Iterate with enumerate
Enumerate in Rust lets you iterate over a collection while automatically tracking the index of each element.
charlesl
imo this is strictly C