harn-stdlib 0.8.25

Embedded Harn standard library source catalog
Documentation 
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// std/json — JSON utility patterns
//
// Import with: import "std/json"
pub import "std/json/stream"

/**
 * Pretty-print a value as indented JSON (2-space indent).
 * pretty.
 */
pub fn pretty(value) {
  return json_stringify_pretty(value)
}

/**
 * Safely parse JSON, returning nil on failure instead of throwing.
 * safe_parse.
 */
pub fn safe_parse(text) {
  let result = try {
    json_parse(text)
  }
  if is_ok(result) {
    return unwrap(result)
  }
  return nil
}

/**
 * Shallow-merge two dicts. Keys in `b` override matching keys in `a`. Generic
 * over the value type so the resulting dict keeps the same value contract as
 * the inputs (`dict<string, V>` in, `dict<string, V>` out).
 */
pub fn merge<V>(a: dict<string, V>, b: dict<string, V>) -> dict<string, V> {
  return __dict_merge(a ?? {}, b ?? {})
}

/**
 * Pick the listed keys from `data`, dropping entries whose stored value is
 * `nil`. Generic over the value type — when called with a `dict<string, V>`
 * the projection keeps the same V.
 */
pub fn pick<V>(data: dict<string, V>, keys: list<string>) -> dict<string, V> {
  return __dict_pick(data ?? {}, keys ?? [])
}

/**
 * Drop the listed keys from `data`. Generic over the value type — the
 * resulting dict keeps the same value contract as the input.
 */
pub fn omit<V>(data: dict<string, V>, keys: list<string>) -> dict<string, V> {
  return __dict_omit(data ?? {}, keys ?? [])
}