musique/examples/assigments-state-management.mq

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Simple variable assigment
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x := 10,
y := 20,
say x,
say y,

x = 30,
say x,
say y,

x = y,
say x,
say y,

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Array updates
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array := flat 1 2 3,
say array,

array = update array 1 10,
say array,

array = update array 1 (array.2),
say array,