PHP数组语法和操作说明

问题描述：

I have to convert a function from PHP to Java, and can use some clarification on PHP's array syntax, which has a few differences from Java. The PHP code is

$W; //array defined before and has values
$S = array();
$j = wsnum - 1; //integer value here

for ( ;  ; ){
  $S[] = $j
  $S[] = $W[$j]; 

}

My interpretation of this snippet is

$S is initialized as an array of length 0
$j is pushed to $S[0]
The contents of $W[$j] are pushed to $S[1]

Is my interpretation correct, or am I barking up the wrong tree?

我必须将函数从PHP转换为Java，并且可以对PHP的数组语法进行一些说明，它具有与Java差异很小。 PHP代码是 p>

  $ W;  //之前定义的数组并且具有值
 $ S = array（）; 
 $ j = wsnum  -  1;  //这里的整数值
 
for（;;）{
 $ S [] = $ j 
 $ S [] = $ W [$ j];  
 
} 
  code>  pre> 
 
 我对此代码段的解释是 p> 
 
 
  $ S 初始化为长度为0的数组 li> 
 
  $ j  code>被推送到 $ S [0]  code>  li> 
  
  $ W [$ j]  code>的内容被推送到 $ S [1]  code>  li> 
  ol> 
 
 我的解释是正确的，还是我在错误的树上咆哮？ p> 
  div>

答

Your interpretation is totally correct.

You can look at this post to learn more about php operators.

The [] operator is a "push" operator. Which always put the value assigned at the end of a given array.

PHP数组语法和操作说明

相关推荐