JavaScript 中的区域感知数字转换 [英] Locale aware number conversion in JavaScript
问题描述
是否有 JQuery 插件 可用于促进 NUMBER 本地化?也就是说，插件应该将数字翻译成它们的本地字形.
<上一页>阿拉伯语 |٤٣٢١ |1234印度语(泰卢固语/印地语) |౧౨౩౪౫/१२३४५ |12345PS:我的要求是数字转换，而不是格式化.
您可以使用像这样的简单函数来翻译来自阿拉伯数字:
function translateNumerals(input, target) {变种系统 = {梵文:2406，泰米尔文:3046，卡纳达文:3302，泰卢固语:3174，马拉地语:2406，马拉雅拉姆语:3430，oriya: 2918, gurmukhi: 2662, nagari: 2534, 古吉拉特语: 2790},zero = 48,//阿拉伯零的字符代码九 = 57,//阿拉伯九的字符代码offset = (systems[target.toLowerCase()] || zero) - 零，输出 = input.toString().split(""),我, l = 输出.长度, cc;对于 (i = 0; i < l; i++) {cc = 输出[i].charCodeAt(0);如果 (cc >= 零 && cc <= 九) {输出[i] = String.fromCharCode(cc + offset);}}返回 output.join("");}然后这样称呼它
translateNumerals(12345, "Telugu")//"౧౨౩౪౫"translateNumerals(12345, "梵文")//"१२३४५"translateNumerals("foo", "Devanagari")//"foo"到阿拉伯数字的翻译同样简单.它只需要多一点管道.
上述函数知道任何目标系统中零的 charCode，并进行一些简单的数学运算，将阿拉伯数字逐个字符转换为该系统.
反向函数需要检查输入的每个字符.如果它落在任何源系统的 charCode 范围(即相应的零 + 9 的 charCode)，它就知道所需的偏移量.减去偏移量将使您进入阿拉伯语范围.这很简单，我会留给你.
<小时>编辑#1:既然你提到了jQuery，上面可以做成这样的插件:
jQuery.fn.extend({textTranslateNumerals: (function () {var translateNumerals = 函数(输入，目标){//上面的函数};返回函数(目标){//对于每个选定的元素...返回 this.each(function () {//...查看每个子节点并$(this).contents().each(function () {//...翻译文本节点，递归成元素if (this.nodeType === this.TEXT_NODE) {$(this).text(translateNumerals($(this).text(), target));} else if (this.nodeType === this.ELEMENT_NODE) {$(this).textTranslateNumerals(target);}});});};})()});<小时>
编辑#2: FWIW，这是一个可以从任何源系统转换为任何目标系统的函数:
function translateNumerals(input, source, target) {变种系统 = {阿拉伯语:48，梵文:2406，泰米尔语:3046，卡纳达语:3302，泰卢固语:3174，马拉地语:2406，马拉雅拉姆语:3430，奥里亚语:2918，古尔穆基语:2662，纳加里语:2534，古吉拉特语:2790，},输出 = []，偏移量 = 0，零 = 0，九 = 0，字符 = 0；源 = source.toLowerCase();目标 = target.toLowerCase();if ( !(系统中的源 && 系统中的目标)||输入 == 空||typeof 输入 == "未定义" ||typeof 输入 == "对象" ) {返回输入；}输入 = input.toString();偏移量 = 系统 [目标] - 系统 [源]；零 = 系统 [来源]；九 = 系统[来源] + 9；for (var i=0, l=input.length; i示例输出
translateNumerals("0123456789", "arabic", "malayalam")//"൦൧൨൩൪൫൬൭൮൯"translateNumerals("൦൧൨൩൪൫൬൭൮൯", "马拉雅拉姆语", "阿拉伯语")//"0123456789"translateNumerals("൦൧൨൩൪൫൬൭൮൯", "malayalam", "kannada")//"೦೧೨೩೪೫೬೭೮೯"translateNumerals("೦೧೨೩೪೫೬೭೮೯", "kannada", "nagari")//"০১২৩৪৫৬৭৮৯"translateNumerals("೦೧೨೩೪೫೬೭೮೯", "kannada", "gujarati")//"૦૧૨૩૪૫૬૭૮૯"translateNumerals("USD 13.56", "arabic", "nagari")//"USD ১৩.৫৬"Is there a JQuery Plugin available that facilitates NUMBER LOCALIZATION ? That is , the plugin should translate numerals into their local glyphs.
Arabic | ٤٣٢١ | 1234 Indic (Telugu/Hindi) | ౧౨౩౪౫/१२३४५ | 12345
PS : My requirement is number CONVERSION , not formatting .
You could use a simple function like this one for the translation from Arabic numerals:
function translateNumerals(input, target) {
var systems = {
devanagari: 2406, tamil: 3046, kannada: 3302,
telugu: 3174, marathi: 2406, malayalam: 3430,
oriya: 2918, gurmukhi: 2662, nagari: 2534, gujarati: 2790
},
zero = 48, // char code for Arabic zero
nine = 57, // char code for Arabic nine
offset = (systems[target.toLowerCase()] || zero) - zero,
output = input.toString().split(""),
i, l = output.length, cc;
for (i = 0; i < l; i++) {
cc = output[i].charCodeAt(0);
if (cc >= zero && cc <= nine) {
output[i] = String.fromCharCode(cc + offset);
}
}
return output.join("");
}
And call it like this
translateNumerals(12345, "Telugu") // "౧౨౩౪౫"
translateNumerals(12345, "Devanagari") // "१२३४५"
translateNumerals("foo", "Devanagari") // "foo"
The translation to Arabic numerals is equally simple. It requires just a little more plumbing.
The above function knows the charCode of the Zero in any target system and does some simple math to do a character-by-character conversion from Arabic numerals to that system.
A reverse function would need to check each character of the input. If it falls the charCode range of any source system (i.e. the charCode of the respective Zero + 9) it knows the required offset. Subtracting the offset will get you into the Arabic range. This is pretty trivial and I'll leave it to you.
EDIT #1: Since you mentioned jQuery, the above could be made into a plugin like this:
jQuery.fn.extend({
textTranslateNumerals: (function () {
var translateNumerals = function (input, target) {
// the above function
};
return function (target) {
// for each selected element...
return this.each(function () {
// ...look at each child node and
$(this).contents().each(function () {
// ...translate text nodes, recurse into elements
if (this.nodeType === this.TEXT_NODE) {
$(this).text(translateNumerals($(this).text(), target));
} else if (this.nodeType === this.ELEMENT_NODE) {
$(this).textTranslateNumerals(target);
}
});
});
};
})()
});
EDIT #2: FWIW, here is a function that can convert from any source system into any target system:
function translateNumerals(input, source, target) {
var systems = {
arabic: 48,
devanagari: 2406, tamil: 3046, kannada: 3302, telugu: 3174, marathi: 2406,
malayalam: 3430, oriya: 2918, gurmukhi: 2662, nagari: 2534, gujarati: 2790,
},
output = [], offset = 0, zero = 0, nine = 0, char = 0;
source = source.toLowerCase();
target = target.toLowerCase();
if ( !(source in systems && target in systems)
|| input == null
|| typeof input == "undefined" || typeof input == "object" ) {
return input;
}
input = input.toString();
offset = systems[target] - systems[source];
zero = systems[source];
nine = systems[source] + 9;
for (var i=0, l=input.length; i<l; i++) {
var char = input.charCodeAt(i);
if (char >= zero && char <= nine) {
output.push( String.fromCharCode(char + offset) );
} else {
output.push( input[i] );
}
}
return output.join("");
}
Sample outputs
translateNumerals("0123456789", "arabic", "malayalam") // "൦൧൨൩൪൫൬൭൮൯"
translateNumerals("൦൧൨൩൪൫൬൭൮൯", "malayalam", "arabic") // "0123456789"
translateNumerals("൦൧൨൩൪൫൬൭൮൯", "malayalam", "kannada") // "೦೧೨೩೪೫೬೭೮೯"
translateNumerals("೦೧೨೩೪೫೬೭೮೯", "kannada", "nagari") // "০১২৩৪৫৬৭৮৯"
translateNumerals("೦೧೨೩೪೫೬೭೮೯", "kannada", "gujarati") // "૦૧૨૩૪૫૬૭૮૯"
translateNumerals("USD 13.56", "arabic", "nagari") // "USD ১৩.৫৬"
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