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The Atomics.compareExchange() static method exchanges a given replacement value at a given position in the array, if a given expected value equals the old value. It returns the old value at that position whether it was equal to the expected value or not. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.or() static method computes a bitwise OR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The Atomics.xor() static method computes a bitwise XOR with a given value at a given position in the array, and returns the old value at that position. This atomic operation guarantees that no other write happens until the modified value is written back.

The sup() method of String values creates a string that embeds this string in a <sup> element (^str), which causes this string to be displayed as superscript.

The Atomics.wait() static method verifies that a shared memory location contains a given value and if so sleeps, awaiting a wake-up notification or a time out. It returns a string which is "not-equal" if the memory location does not match the given value, "ok" if woken by Atomics.notify(), or "timed-out" if the timeout expires.

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