in_array() and implode() for Java
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I'm still getting to grips with Java, but there a few functions I miss coming from PHP. in_array lacks a Java equivalent, as does the implode function. Here are the equvalent methods in Java:
implode()
public static String implode(String[] ary, String delim) { String out = ""; for(int i=0; i<ary.length; i++) { if(i!=0) { out += delim; } out += ary[i]; } return out; }
in_array()
public static boolean in_array(DefaultListModel haystack, String needle) { for(int i=0;i<haystack.size();i++) { if(haystack.get(i).toString().equals(needle)) { return true; } } return false; }
You should use the StringBuilder in your implode method.
Java has built in functionality to search arrays using “Arrays.binarySearch”, but only drawback is that the array needs be sorted before it’s searched.
public static boolean in_array(Object needle, Object[] haystack) {
Arrays.sort(haystack);
return (Arrays.binarySearch(haystack, needle) >= 0);
}
The problem with sorting first is that you need to loop over the array twice. You might not need it sorted.
you can use contains method for in_array equivalent. http://java.sun.com/j2se/1.4.2/docs/api/java/util/List.html#contains(java.lang.Object)
Probably, I was new to Java when I posted this.
super!!!! Really help a lot!!!