LaTeX Font Warning: Font shape `OMS/cmtt/m/n' undefined (Font) using `OMS/cmsy/m/n' instead for symbol `textbackslash' on input line 8. While this still allows for document compilation, it looks like the \textbackslash somehow avoids being formatted according to the basicstyle option. ...
According to the tokenization rules, \* is a control symbol and it is defined in plain TeX and LaTeX to produce a “discretionary multiplication symbol”: if it is used for hyphenation, it will produce a thin space followed by character 2 in \textfont2, usually ✕, at the...
关于线程安全，是指当多个线程访问同一个变量时，该变量不会因为多线程访问产生意想不到的问题，为了避免多线程访问的不可预知的问题，对于程序中多线程能访问到的变量要加锁，即加synchronized，放在同步块中，或者对改变该变量值的方法加synchronized限制。当然jdk中自带的一些类本身就实现了该机制，本身就是线程安全...
metasymbol, except under the "/s" flag, which changes the meaning of ".", but not "\N". Note that "\N{...}" can mean a named or numbered character. Mnemonic: Complement of \n. \R "\R" matches a generic newline, that is, anything that is considered a newline by Unicode. ...