CoffeeScript 字串 - localeCompare()

描述

此方法接受一個字串，並將其與呼叫字串物件進行比較。如果兩者相等，它返回 0；否則返回 -1 或 1。並且如果按本地瀏覽器語言按升序排列，作為引數傳遞的字串在其前面，它返回 1；並且如果按升序排列，呼叫字串在其前面，則返回 -1。

語法

下面給出了 JavaScript 的 localeCompare() 方法的語法。我們可以從 CoffeeScript 程式碼中使用相同的方法。

string.localeCompare( param )

示例

以下示例演示瞭如何在 CoffeeScript 程式碼中使用 JavaScript 的 localeCompare() 方法。將此程式碼儲存在名為 string_localecompare.coffee 的檔案中

str1 = "This is beautiful string"
str2 = "This is beautiful string"
str3 = "abcd"
str4 = "xyz"
console.log "The value of str1:: "+str1
console.log "The value of str2:: "+str2
console.log "The value of str3:: "+str3
console.log "comparing the strings str1 and str2 ::"

index = str1.localeCompare str2
switch index
   when 0 then console.log "Both strings are equal"
   when 1 then console.log "Both strings are not equal and the string passed as parameter will be first in the sorted order."
   when -1 then console.log "Both strings are not equal and the calling string object will be first in the sorted order."
   
   
console.log "comparing the strings str1 and str3 ::"
index = str1.localeCompare str3
switch index
   when 0 then console.log "Both strings are equal"
   when 1 then console.log "Both strings are not equal and the string passed as parameter will be first in the sorted order."
   when -1 then console.log "Both strings are not equal and the calling string object will be first in the sorted order."

console.log "comparing the strings str1 and str4 ::"
index = str1.localeCompare str4
index = str1.localeCompare str3
switch index
   when 0 then console.log "Both strings are equal"
   when 1 then console.log "Both strings are not equal and the string passed as parameter will be first in the sorted order."
   when -1 then console.log "Both strings are not equal and the calling string object will be first in the sorted order."

開啟 命令提示符 並編譯 .coffee 檔案，如下所示。

c:\> coffee -c string_localecompare.coffee

在編譯時，它會給你以下 JavaScript。

// Generated by CoffeeScript 1.10.0
(function() {
  var index, str1, str2, str3, str4;

  str1 = "This is beautiful string";

  str2 = "This is beautiful string";

  str3 = "abcd";

  str4 = "xyz";

  console.log("The value of str1:: " + str1);

  console.log("The value of str2:: " + str2);

  console.log("The value of str3:: " + str3);

  console.log("comparing the strings str1 and str2 ::");

  index = str1.localeCompare(str2);

  switch (index) {
    case 0:
      console.log("Both strings are equal");
      break;
    case 1:
      console.log("Both strings are not equal and the string passed as parameter will be first in the sorted order.");
      break;
    case -1:
      console.log("Both strings are not equal and the calling string object will be first in the sorted order.");
  }

  console.log("comparing the strings str1 and str3 ::");

  index = str1.localeCompare(str3);

  switch (index) {
    case 0:
      console.log("Both strings are equal");
      break;
    case 1:
      console.log("Both strings are not equal and the string passed as parameter will be first in the sorted order.");
      break;
    case -1:
      console.log("Both strings are not equal and the calling string object will be first in the sorted order.");
  }

  console.log("comparing the strings str1 and str4 ::");

  index = str1.localeCompare(str4);

  index = str1.localeCompare(str3);

  switch (index) {
    case 0:
      console.log("Both strings are equal");
      break;
    case 1:
      console.log("Both strings are not equal and the string passed as parameter will be first in the sorted order.");
      break;
    case -1:
      console.log("Both strings are not equal and the calling string object will be first in the sorted order.");
  }

}).call(this);

現在，再次開啟 命令提示符，並執行 CoffeeScript 檔案，如下所示。

c:\> coffee string_localecompare.coffee 

在執行時，CoffeeScript 檔案產生以下輸出。

The value of str1:: This is beautiful string
The value of str2:: This is beautiful string
The value of str3:: abcd
comparing the strings str1 and str2 ::
Both strings are equal
comparing the strings str1 and str3 ::
Both strings are not equal and the string passed as parameter will be first in the sorted order.
comparing the strings str1 and str4 ::
Both strings are not equal and the string passed as parameter will be first in the sorted order.