javascript - Fastest method to replace all instances of a character in a string -

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What is the fastest way to change all the examples of string / character in a string Javascript ? A while , a for-loop , a regular expression ?

To change all instances, it would be easy to use a regular expression with the g flag: 

  str.replace / foo / g, "bar")

with foo with bar string str If you have just one string, you can change it to a RegExp object: 

  var pattern = "foobar", then = new RegExp (pattern, "g ");

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