Using JavaScript to truncate text to a certain size (8 KB)
问题 I'm using the Zemanta API, which accepts up to 8 KB of text per call. I'm extracting the text to send to Zemanta from Web pages using JavaScript, so I'm looking for a function that will truncate my text at exactly 8 KB. Zemanta should do this truncation on its own (i.e., if you send it a larger string), but I need to shuttle this text around a bit before making the API call, so I want to keep the payload as small as possible. Is it safe to assume that 8 KB of text is 8,192 characters, and to