string - Read For Learn

What is the difference between String.subString() and String.subSequence()

Using str.subSequence(begin, end) returns a CharSequence which is a read-only form of the string represented as a sequence of chars. For example: It’s read only in the sense that you can’t change the chars within the CharSequence without instantiating a new instance of a CharSequence. If you have to use str.subSequence(begin, end), you can cast the result to a String: and use all the normal String operators like subSequence … Read more

Return string Input with parse.string

You don’t need to parse the string, it’s defined as a string already. Just do:

Check if a string contains another string

Use the Instr function will return 15 in pos If not found it will return 0 If you need to find the comma with an excel formula you can use the =FIND(“,”;A1) function. Notice that if you want to use Instr to find the position of a string case-insensitive use the third parameter of Instr and give it the const vbTextCompare (or just … Read more

Java way to check if a string is palindrome

Using reverse is overkill because you don’t need to generate an extra string, you just need to query the existing one. The following example checks the first and last characters are the same, and then walks further inside the string checking the results each time. It returns as soon as s is not a palindrome. The problem with the reverse approach … Read more

Split a string using string.gmatch() in Lua

By adding one extra ; at the end of the string, the string now becomes “one;two;;four;”, everything you want to capture can use the pattern “([^;]*);” to match: anything not ; followed by a ;(greedy). Test: Output:

Converting a vector to string

Maybe std::ostream_iterator and std::ostringstream:

Python string class like StringBuilder in C#?

There is no one-to-one correlation. For a really good article please see Efficient String Concatenation in Python: Building long strings in the Python progamming language can sometimes result in very slow running code. In this article I investigate the computational performance of various string concatenation methods. TLDR the fastest method is below. It’s extremely compact, and … Read more

catDog string problem at Codingbat.com

While you are pretty close to a solution, there are a few critical problems in your code: Your call to substring() fetches a string of size 2. That string can never be cat nor dog. Change the second parameter in the method call to i + 3 to get 3 characters. Your call to substring() will throw an IndexOutOfRangeException, as i approaches the end of the length of the input string. Make … Read more

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