Atlas expressions • atlas_layerid and atlas_layername: Returns layer ID and layer name of the current layer in the atlas. Aggregate expressions • array_agg(expression, group_by, filter): Returns an array of aggregated values from a field or expression. Array expressions New group that contains expression functions for the creation and manipulation of arrays (also known as list data structures). The order of values within the array matters, in contrary to the 'map' data structure, where the order of key-value pairs is irrelevant and values are identified by their keys. • array(value1, value2, ): Returns an array containing all the values passed as parameter. • array_append(array, value): Returns an array with the given value added at the end. • array_cat(array1, array2, ): Returns an array containing all the given arrays concatenated.

• array_contains(array, value): Returns true if an array contains the given value. • array_distinct(array): Returns an array containing distinct values of the given array.

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• array_find(array, value): Returns the index (0 for the first one) of a value within an array. G2000 singapore. Returns -1 if the value is not found.

• array_first(array): Returns the first value of an array. • array_get(array, index): Returns the Nth value (0 for the first one) of an array. • array_insert(array, pos, value): Returns an array with the given value added at the given position. • array_intersect(array1, array2): Returns true if any element of array1 exists in array2.

• array_last(array): Returns the last value of an array. • array_length(array): Returns the number of elements of an array. • array_prepend(array, value): Returns an array with the given value added at the beginning. • array_remove_all(array, value): Returns an array with all the entries of the given value removed.

• array_remove_at(array, pos): Returns an array with the given index removed. • array_reverse(array): Returns the given array with array values in reversed order.

• array_slice(array, start_pos, end_pos): Returns a portion of the array. The slice is defined by the start_pos and end_pos arguments.

• array_to_string(array, delimiter, empty_value): Concatenates array elements into a string separated by a delimiter using and optional string for empty values. • regexp_matches(string, regex, empty_value): Returns an array of all strings captured by capturing groups, in the order the groups themselves appear in the supplied regular expression against a string. • string_to_array(string, delimiter, empty_value): Splits string into an array using supplied delimiter and optional string for empty values. Color expressions • create_ramp(map, discrete): Returns a gradient ramp from a map of color strings and steps. Date and Time expressions • epoch(date): Return the interval in milliseconds between the unix epoch and a given date value. General expressions • env(name): Gets an environment variable and returns its content as a string. If the variable is not found, NULL will be returned.

Blank email in outlook for mac. • raster_statistic(layer, band, property): Returns statistics from a raster layer. Properties: min/max/avg/range/stdev/sum • with_variable(name, value, node): This function sets a variable for any expression code that will be provided as 3rd argument. This is only useful for complicated expressions, where the same calculated value needs to be used in different places. Geometry expressions • extend(geometry, start_distance, end_distance): Extends linestrings by a specified amount at the start and end of the line • hausdorff_distance(geometry a, geometry b, densify_fraction): Returns the Hausdorff distance between two geometries. This is basically a measure of how similar or dissimilar 2 geometries are, with a lower distance indicating more similar geometries.