Advanced Coding – Working Without

X: Most intermediate/advanced programmers thinks it’s too difficult to work out of the kernel
X: it’s not impossible at all
X: for example.. to process a string and find a substring inside it, in node.js and c++, we will include a library, and use the substring() function.
X: For the fun of it, I decided not use that function, and manually iterate through characters in the string, and cut at desired position.
X: the performance difference for this action alone is about 2000%

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