elasticsearch escape double quotes

1. All characters within the single quotation mark retain the meaning of its own character, without being interpreted by bash, echo-e the escape character (\n,\t, etc.) will be interpreted, such as echo-e ' Aa\naa ' will be two lines AA.2. In addition to $, ' (not single quotes) and \, all characters within the double quotation mark retain the meaning of the char

JS inside the single and double quotation marks can be used at the same time, but to follow certain criteria.The most used double quotation marks, then the inside can no longer use double quotation marks, because the quotation marks are paired, the browser reads a double quotation mark, to the 2nd

today we directly through a few practical small cases to explain the difference, we observe carefully! //double quotation mark knowledge explanation //This is a mistake because it will treat hello as a double-quote character, and world will be a character you don't know. $str 1 = "Hello" World "". '; //correct notation: the world with double

In PHP, the definition of a string can be in English single quotes ', or you can use double quotes in English. But you must use the same single or double quotes to define strings, such as ' Hello World ' and ' Hello World ' for illegal string definitions. What's the differ

A simple summary of the difference between single and double quotes in PHP strings, PHP string Today, a friend asked, said the difference, by the way review. Single and double quotation marks are different: The fields inside the double quotation mark are interpreted by the compiler and then output as HTML code.

SQL statements using basic DML types in MySQL, "and" are default string label symbols. In reality, however, the following situations often occur:One: Query situationSELECT book_id from PD WHERE isbn= ' 123456789 ' and Book_name= ' "China" and "cloud-dwelling community";In this case, the book_name corresponding string is not problematic and the SQL statement has no syntax problems. But look at one of the following statements:SQL, insert into yourtable (F1,F2) VALUES (M, ' abc ')SELECT book_id fro

Recently using JavaScript programming, encountering the use of strings Wrote a little bit of test code var str = ' This is Jack '; var str2 = "This is Tom"; var str3 = ' This is ' Rose '; var STR4 = "This is ' LiLi '"; var STR5 = "This is \" "Sun\"; var STR6 = ' This is \ ' mary\ '; var STR7 = "This is \ ' lucy\ '"; var str8 = ' This is \ ' rooney\ '; var STR9 = ' This is \\Ronaldo\\ '; Console.log (str);

do not confuse the shell prompt).>: redirect stdout.|: Pipeline command.: Redirect The file descriptor or place the command in the background.(): Place commands inside the nested Subshell execution, or for operations or command substitution.{}: Place the command inside the non-named function or use it in the defined scope of the variable substitution.; : Proceed to the next command at the end of the previous command, ignoring its return value.: At the end of the previous command, if the return

PHP single double quotation mark difference in PHP, the definition of a string can use single quotation marks ' ' in English , you can also use double quotes " " in English . However, you must use the same single or double quotation mark to define a string, such as: 'Hello World" and "Hello World' an illegal string d

Today, a friend asked, the next difference, by the way review. Single quotes differ from double quotes: The fields inside the double quotes are interpreted by the compiler and then exported as HTML code. ' Single quotes

Add an escape character before double quotation marks: \ " There are double quotes in the string, how do you say it?For:Before double quotes, add backslashes! \"Example: String at+cscs= "GSM"expressed as "at+cscs=\" gsm\ ""

First, EscapeSingle quotes: only escape \ ' and \ \, others not escapedDouble quotes: both escapedSecond, the variable analysisSingle quote: Cannot parse variable (output as-is)Double quotes: You can parse variablesThird, speedSingle quo