square-bracket

问题 In certain cases typing an opening square bracket results in nothing at all. In particular when I want to type them on a variable in the right side of assignment expression: arr[i] = arr So I cant type, for example: arr[i] = arr[9] It has something to do with Resharper. However, turning of autocomplete and stuff doesn't seem to solve it. Anyone familiar with this problem? 回答1: I had the same issue the first time I insalled Resharper. Look under Tools > Options > Environment > Keyboard to what

问题 My first language is Javascript, but I'm starting to learn C++. One of my favorite things to do is access properties with clever variable property names using square bracket notation in Javascript like so: var a = "prop"; var obj = { this.prop : "before" }; function alterObj(a){ obj[a] = "after"; } It doesn't seem to be coming up in my C++ books, and I'm having trouble Googling it. So how does one dynamically select property names in C++? 回答1: The short answer is one cannot do this in c++. A

问题 In MATLAB you can create an array of integers easily with N = 100; % Number of points A = 1:N; % row vector of 1,2,3,..., 100 If I want a column vector instead of a row vector, I can do that with A = [1:N].'; Now, MATLAB warns me that Use of brackets [] is unnecessary. Use parentheses to group if necessary. Well, they are not unnecessary, because 1:N.' creates a row vector, as only the scalar N is transposed, as opposed to the full array. I can of course suppress this message on that line, in

问题 In MATLAB you can create an array of integers easily with N = 100; % Number of points A = 1:N; % row vector of 1,2,3,..., 100 If I want a column vector instead of a row vector, I can do that with A = [1:N].'; Now, MATLAB warns me that Use of brackets [] is unnecessary. Use parentheses to group if necessary. Well, they are not unnecessary, because 1:N.' creates a row vector, as only the scalar N is transposed, as opposed to the full array. I can of course suppress this message on that line, in

问题 I have request that set list of services that are turned on for user. Request has following format: https://myserver.com/setservices?param1=val1&param2=val2&service[10]&service[1000]&service[10000] List of service parameters ("service[10]&service[1000]&service[10000]") is created dynamically and each parameter doesn't have value. Is it possible to achive this using Retrofit? 回答1: From the retrofit documentation: For complex query parameter combinations a Map can be used. @GET("/group/{id}

问题 After setting up eslint-plugin-security, I went on to attempt to address nearly 400 uses of square brackets in our javascript codebase (flagged by the rule security/detect-object-injection). Although this plugin could be a lot more intelligent, any uses of square brackets could possibly be an opportunity for a malicious agent to inject their own code. To understand how, and to understand the whole context of my question, you need to read this documentation: https://github.com/nodesecurity

问题 After setting up eslint-plugin-security, I went on to attempt to address nearly 400 uses of square brackets in our javascript codebase (flagged by the rule security/detect-object-injection). Although this plugin could be a lot more intelligent, any uses of square brackets could possibly be an opportunity for a malicious agent to inject their own code. To understand how, and to understand the whole context of my question, you need to read this documentation: https://github.com/nodesecurity

问题 $('#parent_tab [href="#tab1"').click(); The above line works fine and the tab gets selected in other browsers but not safari. I had to close the square bracket of href as follows in order to make it work in Safari. $('#parent_tab [href="#tab1"]').click(); Why did jquery not throw an error when the square bracket is not closed? 回答1: This looks like it's a Safari issue. Another reason is because the closing bracket is inside the jQuery selector. Safari might be concerned only with JavaScript

问题 I am assisting on a project right now and building out templates for the first time, trying to wrap my head around a few things but one aspect of the html that's confusing me are certain things sitting in square brackets. I've never used these in html before so I'm just wondering what they are for (when I open the page in a browser they all show up as text) Here's a bit of the code: <div class="container"> [HASBREADCRUMBS] <ol class="nav-breadcrumb"> [BREADCRUMBS] </ol> [/HASBREADCRUMBS] <h1

问题 Usually, I use square brackets in the if statement: if [ "$name" = 'Bob' ]; then ... But, when I check if grep succeeded I don't use the square brackets: if grep -q "$text" $file ; then ... When are the square brackets necessary in the if statement? 回答1: The square brackets are a synonym for the test command. An if statement checks the exit status of a command in order to decide which branch to take. grep -q "$text" is a command, but "$name" = 'Bob' is not--it's just an expression. test is a