three line equal sign

Dual-equal sign = in ruby When I was writing code two days ago, I suddenly received a warning that the project code had an XSS vulnerability, So I immediately checked the Page code based on the reported URL, although it was fixed soon, in addition,

We can see this line of code if (typeofitem & quot; string & quot;). We can see three equal signs that have never been written before, maybe it's because my JS technology is still in its infancy, I checked some materials on the Internet and said

Today, I saw situ's article in my blog. I saw this line of code if (typeof item = "string"). I saw three equal signs that I have never written before, maybe it's the reason why my JS technology is still in its infancy. I went to the Internet and

1 Why should you judge?Some students may see this title will be puzzled, why we have to determine whether the two variables in JavaScript is equal, JavaScript is not already provided with the double equals "= =" and the three equals "= = =" To us

Probably test instructions:Given an array of a, ask in an interval l~r, what is the maximum value for the smallest number in a contiguous period of W.Obviously it can be turned into a two-point height and then judge the feasibility

4.1.4 Relational operatorsIn C + +, in addition to arithmetic operations that require arithmetic operators to subtraction the data, we sometimes need to manipulate the relationship between the data, that is, to compare the size of the two data to

4.1.4 Relational operatorsIn C + +, in addition to arithmetic operations that require arithmetic operators to subtraction the data, we sometimes need to manipulate the relationship between the data, that is, to compare the size of the two data to

Early knowledge of sed and gawk in Linux Command Line and shell script ProgrammingThe sed editor of the Text Processing editor can process data in a data stream based on commands that are input to the command line or stored in the Command text file.

sed (stream editor) Function Description: Use script to process text files.Syntax: sed [-hnv][-e][-f][text file]Additional Note: SED can process and edit text files according to script instructions.Parameters:-e or--expression= the input text file

1. Delete Deletes the definition of the object's properties and methods. forces a reference to it to be set to undefinedThe delete operator cannot delete properties and methods that are not defined by the developer.2,The void operator returns