[ios, macos] Updated example code

1 files changed, 3 insertions, 5 deletions

diff --git a/platform/darwin/docs/guides/Predicates and Expressions.md b/platform/darwin/docs/guides/Predicates and Expressions.md
index 057f991eac..caf4226cfd 100644
--- a/platform/darwin/docs/guides/Predicates and Expressions.md
+++ b/platform/darwin/docs/guides/Predicates and Expressions.md
@@ -195,7 +195,7 @@ Initializer parameter | Format string syntax | Description
 `mgl_interpolate:withCurveType:parameters:stops:` | `mgl_interpolate:withCurveType:parameters:stops:(x, 'linear', nil, %@)` | Produces continuous, smooth results by interpolating between pairs of input and output values (“stops”). Compared to the `mgl_interpolateWithCurveType:parameters:stops:` custom function, the input expression (that function’s target) is instead passed in as the first argument to this function.
 `mgl_step:from:stops:` | `mgl_step:from:stops:(x, 11, %@)` |Produces discrete, stepped results by evaluating a piecewise-constant function defined by pairs of input and output values ("stops"). Compared to the `mgl_stepWithMinimum:stops:` custom function, the input expression (that function’s target) is instead passed in as the first argument to this function.
 `mgl_join:` | `mgl_join({'Old', 'MacDonald'})` | Returns the result of concatenating together all the elements of an array in order. Compared to the `stringByAppendingString:` custom function, this function takes only one argument, which is an aggregate expression containing the strings to concatenate.
-`mgl_coalesce:` | `mgl_coalesce({x, y, z})` | Returns the first not null value from an array of expressions.
+`mgl_coalesce:` | `mgl_coalesce({x, y, z})` | Returns the first non-`nil` value from an array of expressions.
 `MGL_LET` | `MGL_LET('age', uppercase('old'), 'name', uppercase('MacDonald'), mgl_join({$age, $name}))` | Any number of variable names interspersed with their assigned `NSExpression` values, followed by an `NSExpression` that may contain references to those variables. Compared to the `mgl_expressionWithContext:` custom function, this function takes the variable names and values inline before the expression that contains references to those variables.
 `MGL_MATCH` | `MGL_MATCH(x, 0, 'zero match', 1, 'one match', 'two match', 'default')` | Evaluates the first expression and returns the value that matches the initial condition. After the first expression condition a pair of matching/return value should be added and a default value.
 `MGL_IF` | `MGL_IF(1 = 2, YES, 2 = 2, YES, NO)` | Returns the first value that meets the condition otherwise a default value. The expression conditions should be added in pairs of conditional/return value.
@@ -422,11 +422,9 @@ of a [Mapbox-specific function](#mapbox-specific-functions) that takes an
 `NSDictionary` as an argument:
 
 ```objc
-[NSExpression expressionWithFormat:@"FUNCTION($floorCount + 1, 'mgl_expressionWithContext:', %@)",
- {@"floorCount": @2}];
+[NSExpression expressionWithFormat:@"MGL_LET('floorCount', 2, $floorCount + 1)"];
 ```
 
 ```swift
-NSExpression(format: "FUNCTION($floorCount + 1, 'mgl_expressionWithContext:', %@)",
-             ["floorCount": 2])
+NSExpression(format: "MGL_LET(floorCount, 2, $floorCount + 1)")
 ```