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conCat.java

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public String conCat(String a, String b) {

String result = "";

if (a.length() <1 || b.length() < 1){

result = a+b;

return result;

}

if (a.substring(a.length() - 1).equals(b.substring(0,1))){

result = a + b.substring(1);

return result;

}

result = a+b;

return result;

}

/*

Given two strings, append them together (known as "concatenation") and return the result. However, if the concatenation creates a double-char, then omit one of the chars, so "abc" and "cat" yields "abcat".

conCat("abc", "cat") → "abcat"

conCat("dog", "cat") → "dogcat"

conCat("abc", "") → "abc"

*/