In Clean Code, Robert Martin writes, “Negatives are just a bit harder to understand than positives. So, when possible, conditionals should be expressed as positives.” (Martin, [G29]). IntelliJ IDEA has three inspections to help you stay positive.
在洁净代码中马丁.罗伯特写到：负值比正值难以理解一点。因此，如果可能，尽量使用正值的表达式。IntelliJ IDEA有三项检查帮助你保留正值。
for example：
boolean isBigger（a,b）{
return a >b;
}
boolean isLess（a,b）{
return a <=b;
}
if(!isBigger(c,d)){//1
System.out.println(c+"is less than " +d);
}
if(isLess(c,d)){//2
System.out.println(c+"is less than " +d);
}
2 是比较好理解的代码，1是比较难以理解的代码。
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