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Editorial Team
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Asked: 2026-05-27T01:07:53+00:00

actually I want to replace a string except if it comes in a round

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actually I want to replace a string except if it comes in a round bracket.

For example: 

JAVA is a nice language. (JAVA) has lots of features. JAVA is portable. (JAVA) even comes in 64 bit.

now if i replace JAVA with C:

then desired output is : 

C is a nice language. (JAVA) has lots of features. C is portable. (JAVA) even comes in 64 bit.

even java can come as a sub string like 

 XJAVAX is a nice language. (XJAVAX) has lots of features. JAVA is portable. (JAVA) even comes in 64 bit.

now if i replace JAVA by C :

Then expected output :

XCX is a nice language. (XJAVAX) has lots of features. C is portable. (JAVA) even comes in 64 bit.
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1 Answer

  1. Editorial Team

    Since JavaScript doesn’t have look-behind, the easiest way is probably an alternation:

    str = str.replace(/\(JAVA\)|JAVA/g, function(m) {
    return m === "(JAVA)" ? m : "C";
    // Or
    // return m.length === 6 ? m : "C";
});

    Beyond that, you get into trying to simulate look-behind, which is possible in some ways, but messy.

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