The idea behind the counter is to use always increment and decrement operation, eg: item + 1 || item - 1
Since it will not depend on which number stopped on the last row, you can deal easily with concurrent connections without loss any data.
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The idea behind the counter is to use always increment and decrement operation, eg: item + 1 || item - 1
Since it will not depend on which number stopped on the last row, you can deal easily with concurrent connections without loss any data.