Returns a string object with its contents initialized to a substring of the current object. This substring is the character sequence that ... ... <看更多>

21 Strings library [strings]. 21.3 String classes [string.classes]. 21.3.1 Class template basic_string [basic.string]. 21.3.1.7 basic_string string ... ... <看更多>

https://github.com/facebook/flow/blob/master/lib/core.js#L262-L263 substr(from: number, length?: number): string; substring(start: number, ... ... <看更多>

https://github.com/facebook/flow/blob/master/lib/core.js#L262-L263 substr(from: number, length?: number): string; substring(start: number, ... ... <看更多>

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