📊 列表统计（项数、重复项、长度、数值统计）Print List Statistics
一键统计列表的各项指标：总项数、不同项数、重复项及重复次数、空项数、最短和最长的项目、平均长度、总字符数；如果项目都是数字，还会给出总和、平均值、中位数、最小值、最大值、极差和标准差。自动识别换行、逗号等分隔符，可忽略大小写。适合快速检查名单、数据列和问卷结果，数据在本地处理。Get the key statistics of a list at once: total items, distinct items, duplicated items and how often they repeat, empty items, the shortest and longest items, average length and total characters. If every item is a number you also get the sum, mean, median, minimum, maximum, range and standard deviation. Separators such as new lines and commas are detected automatically, and case can be ignored. Handy for checking name lists, data columns and survey results quickly. Processed locally.
使用说明与常见问题How-to & FAQ
「列表统计（项数、重复项、长度、数值统计）」是什么？What is the Print List Statistics tool?
一键统计列表的各项指标：总项数、不同项数、重复项及重复次数、空项数、最短和最长的项目、平均长度、总字符数；如果项目都是数字，还会给出总和、平均值、中位数、最小值、最大值、极差和标准差。自动识别换行、逗号等分隔符，可忽略大小写。适合快速检查名单、数据列和问卷结果，数据在本地处理。Get the key statistics of a list at once: total items, distinct items, duplicated items and how often they repeat, empty items, the shortest and longest items, average length and total characters. If every item is a number you also get the sum, mean, median, minimum, maximum, range and standard deviation. Separators such as new lines and commas are detected automatically, and case can be ignored. Handy for checking name lists, data columns and survey results quickly. Processed locally.
如何使用「列表统计（项数、重复项、长度、数值统计）」？How do I use the Print List Statistics tool?
在「列表统计（项数、重复项、长度、数值统计）」中，把内容粘贴或输入到上方输入框，按需设置「输入分隔符」、「自定义」，结果会实时显示在下方，点击「复制结果」即可复制。In the Print List Statistics: Paste or type into the input box, adjust "Input separator", "Custom"; the result appears below instantly — click "Copy result" to copy it.
统计项分别是什么意思？What do the statistics mean?
项数是非空项目的个数；不同项是去重后的个数；重复项是出现超过一次的项目有几种，并列出出现最多的几个；多余的重复 = 项数 − 不同项，即去重时会删掉多少项；长度按字符数计算（一个汉字或表情算 1 个）。Items is the number of non-empty items; Distinct items is the count after removing duplicates; Duplicated items is how many different values appear more than once, with the most frequent listed; Extra copies = items − distinct items, i.e. how many would be removed by de-duplication. Lengths count characters (a Chinese character or emoji counts as one).
什么时候会显示数值统计？When are number statistics shown?
只有当所有项目都是数字时（允许负号、小数、科学计数法和 1,000 这样的千位分隔符）才会计算总和、平均值、中位数、极差和标准差。标准差为样本标准差（除以 n − 1），与 Excel 的 STDEV.S 相同。需要更多统计量（众数、四分位数等）请使用“统计计算器”。Sum, mean, median, range and standard deviation are worked out only when every item is a number (minus signs, decimals, scientific notation and thousands separators like 1,000 are fine). The standard deviation is the sample one (divided by n − 1), the same as Excel's STDEV.S. For more statistics, such as mode and quartiles, use the Statistics Calculator.
分隔符是怎么自动识别的？How is the separator detected automatically?
“自动识别”按以下顺序判断：有换行就按行分隔，否则依次检查 Tab、分号、逗号（含中文逗号和顿号）、竖线，最后才是空格。用逗号、分号或 Tab 分隔时支持 CSV 式的双引号，例如 "北京, 中国" 会被当作一项。需要其他符号时选择“自定义”，可用 \n 和 \t 表示换行和 Tab。输出沿用原来的分隔符（包括自定义分隔符和中文逗号），含分隔符的项会重新加上双引号；空行默认忽略，不算作项目。Auto-detect works in this order: if there are line breaks, each line is an item; otherwise it checks for tabs, semicolons, commas (including the Chinese comma and enumeration comma), pipes and finally spaces. With comma, semicolon or tab separators, CSV-style double quotes are honoured, so "Paris, France" counts as one item. Choose Custom for anything else; \n and \t stand for a new line and a tab. The output keeps the original separator (including a custom one or the Chinese comma), items that contain the separator are quoted again, and blank lines are ignored by default.
有哪些选项可以调整？What options can I adjust?
「列表统计（项数、重复项、长度、数值统计）」的设置：「输入分隔符」可选 自动识别、换行、逗号、分号、Tab、空格等（默认 自动识别）；「自定义」可留空；可勾选：「忽略大小写」、「去掉首尾空格」（默认勾选）。改动任一选项后结果会按新设置重新生成。Settings in the Print List Statistics — "Input separator": Auto-detect, New line, Comma, Semicolon, Tab, Space, etc. (default Auto-detect); "Custom" optional; tick boxes: "Ignore case", "Trim spaces" (on by default). Changing any option regenerates the result with the new setting.
处理大段文本会卡吗？Can it handle long text?
「列表统计（项数、重复项、长度、数值统计）」在浏览器中直接处理，几 MB 以内的文本通常瞬间完成；文本不会离开你的设备。The Print List Statistics runs in your browser; text up to a few MB is usually processed instantly and never leaves your device.
「列表统计（项数、重复项、长度、数值统计）」免费吗？需要注册吗？Is the Print List Statistics free? Do I need an account?
「列表统计（项数、重复项、长度、数值统计）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Print List Statistics is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.