By programming in a virtual machine, The obtained program cannot be in the ARM Run in, You need to go through a cross compile.
#Regex word boundary download
Through the configuration of three services, We can do it in ARM Download the kernel and file system from.
#Regex word boundary code
On behalf of * Any tag content, After replacement, the source code of the web page is only plain text :]*>3. Represents any number of characters :(.*?)2.
Regular basis \b More about word boundaries Here “\b” The backspace key, Not word boundaries. “\b” Used in regularization, Usually, it means the word boundary, Only in character groups, It represents the backspace key, namely More complex applications are often used in conjunction with other regular grammar rules, Refer to a post Give an example ： Statistics to “,” Divided elements “3” The number of The scenes that are used more often are HTML Tag matching, To distinguish between tags that contain each other, Like filtering out 、、、 Such as tag, But keep label, Regular can be written as “]*>”. įor example, to replace an English word “to”, and “today” Obviously not in the scope of replacement, So regular can use “\bto\b” To limit. “\b” It is generally applied to the substring composed of characters that need to match a certain word, But this character cannot be contained in a longer substring of the same word character. So in general ,Java Medium “\w” It's very strange, and “\b” It's consistent with other languages, Pay attention to. NET It's consistent ,“\b” stay Java China is supportive Unicode Of. String test = "abc_123 chinese _d3=efg Chinese characters %" Let's take a look first “\w” Examples of matching in several languages stay Java in ,“\w” It's quite strange ,Java It's supporting Unicode Of, but Java In the regularization of “\w” But it's equivalent to Of. Īlmost all common languages follow this rule, Only Java The exception is.
#Regex word boundary full
NET, By default ,“\w” Division can match Outside, You can also match some Unicode Character set, Such as Chinese characters, Full angle numbers and so on. In support of Unicode The language of, Such as. In support of ASCII In the language of code, Such as JavaScript,“\w” Equivalent to It's about “\w”, Then we need to examine its scope first. Reflection ： Why isn't the following equivalent to “\b”
“\b” The side that represents the position is the word character, On the other side are non word characters 、 The beginning or end of a string, Which is equivalent to Usually, In regular expressions, the so-called “ word ”, Is the “\w” A substring of characters defined. īasically all the information will say “\b” It's word boundaries, But what about “ word ” But the scope of it is rarely mentioned. “\b” It's just a matching position, On one side of this position are the characters that make up the word, On the other side are non word characters 、 The beginning or end of a string. “\b” Match word boundaries, Does not match any characters.
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