symbols

in java what does the @ symbol mean?

∥☆過路亽.° 提交于 2019-12-02 20:04:25
I know what it means in a comment for documentation purposes, but outside of that what does it mean? (I would normally just google this but every non letter symbol shows up in results) Sweeper The @ symbol denotes a Java Annotation. What a Java annotation does, is that it adds a special attribute to the variable, method, class, interface, or other language elements. (This can be configured when you declare the annotation) When you add an annotation to something, other parts of the program can check whether something has an annotation or not. It then can use this information to do whatever

PHP Access Object Property with @ at the rate symbol

穿精又带淫゛_ 提交于 2019-12-02 19:45:38
问题 An api is return an object with this structure, [ABC] => stdClass Object ( [@total] => 149.66667 ) This is result in print_r function, how to access total's value, i have tried ABC->@total ABC->total ABC['total'] ABC['@total'] but nothing works. 回答1: Wrap it into {} : $ABC->{"@total"}; // here it needs to insert quotes as well Also note that you have to prefix your class object with the dollar sign, this is the link to sandbox example. 来源: https://stackoverflow.com/questions/25217679/php

How to fix “cannot find symbol error” for my program?

ⅰ亾dé卋堺 提交于 2019-12-02 19:41:15
问题 I am struggling to find why I keep receiving this message: Integer.java:13: error: cannot find symbol num = Integer.parseInt(numStr); ^ symbol: method parseInt(String) location: class Integer Integer.java:16: error: cannot find symbol num2 = String.parseInt(numStr2); ^ symbol: method parseInt(String) location: class String 2 errors Is there something I missed? Thanks. import javax.swing.JOptionPane; public class Integer { public static void main (String[] args) { String numStr, numStr2, sum,

ERROR: Symbol file could not be found. windbg.exe

女生的网名这么多〃 提交于 2019-12-02 18:18:33
I downloaded the symbols from http://www.microsoft.com/whdc/devtools/debugging/symbolpkg.mspx the package (Windows 7 RTM x86 retail symbols, all languages) but it still gives me the same error! Done .sympath but still not working .sympath C:\inetpub\wwwroot\ProductsService\bin\ProductsEntityModel.pdb;srv c:\Symbols http://msdl.microsoft.com/download/symbols Microsoft (R) Windows Debugger Version 6.12.0002.633 X86 Copyright (c) Microsoft Corporation. All rights reserved. Microsoft (R) Windows Debugger Version 6.12.0002.633 X86 Copyright (c) Microsoft Corporation. All rights reserved.

Assembly Definition Errors

笑着哭i 提交于 2019-12-02 17:25:11
问题 I am trying to mess around with my assembly function to get it to work but have ran into a couple of errors that are difficult to get by. One is A2005 which states symbol redefinition :_Average. The other one is A1010 which states unmatched block nesting :_Average Any help is appreciated. .cpp code #include<iostream> using namespace std; extern "C" long Average(long, long[]); int main() { long Array1[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; long Array2[11] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,

Unfamiliar symbol in algorithm: what does ∀ mean? [closed]

偶尔善良 提交于 2019-12-02 15:01:12
I'm reading about an algorithm (it's a path-finding algorithm based on A*), and it contains a mathematical symbol I'm unfamiliar with: ∀ Here is the context: v(s) ≥ g(s) = min s'∈pred(s) (v(s') + c(s', s)) ∀s ≠ s start Can someone explain the meaning of ∀? That's the "forall" (for all) symbol, as seen in Wikipedia's table of mathematical symbols or the Unicode forall character ( \u2200 , ∀). The upside-down A symbol is the universal quantifier from predicate logic . (Also see the more complete discussion of the first-order predicate calculus .) As others noted, it means that the stated

What should I change to make this file compile?

老子叫甜甜 提交于 2019-12-02 14:53:15
I am in a programming class and this program is part of my homework. This file analyzes data from a file called "Names.txt" and then prints the information. I'm getting compilation errors and I want to know what I need to change or add to make it compile successfully. Here is my code: import java.util.Scanner; import java.io.File; import java.io.FileNotFoundException; public class NameApp { public static void main(String[] args) { Scanner stdin = new Scanner(System.in); String selection, nameIn, nameIn2; Name name, name2; int decade; String first = "1", second = "2", third = "3", fourth = "4",

How to tell Autoconf “require symbol A or B” from LIB?

≡放荡痞女 提交于 2019-12-02 14:46:11
问题 I'm trying to configure Postgres 9.5.4 for OpenSSL 1.1.0. Configure is dying because it can't find SSL_library_init in OpenSSL 1.1.0. OpenSSL 1.1.0 provides OPENSSL_init_ssl instead of SSL_library_init . So Autoconf needs to check for either SSL_library_init or OPENSSL_init_ssl . Postgres uses the following test: AC_CHECK_LIB(ssl, SSL_library_init, [], [AC_MSG_ERROR([library 'ssl' is required for OpenSSL])]) How do I modify that [rule?] to look for either SSL_library_init or OPENSSL_init_ssl

How to show π symbol on x axis?

自古美人都是妖i 提交于 2019-12-02 13:59:20
Feel frustrated when I cannot add a simple "π" symbol on x axis. I searched lots of solution and there is what I use: set terminal postscript eps enhanced set output "test.eps" set xrange [-2*pi:2*pi] set sample 600 set xtics pi set mxtics 2 set xtics ("-2{/Symbol P}" -2*pi, "-{/Symbol P}" -pi, "0" 0, "{/Symbol P}" pi, "2{/Symbol P}" 2*pi) There is no "π" on the x axis! Am I wrong with any codes? or I missed any possible packages? Please see the xlabel below: Update: I tried lots of methods including set terminal enhanced, but still doesn't work. And I just find that my mac Preview (pdf viewer

PHP Access Object Property with @ at the rate symbol

青春壹個敷衍的年華 提交于 2019-12-02 12:42:29
An api is return an object with this structure, [ABC] => stdClass Object ( [@total] => 149.66667 ) This is result in print_r function, how to access total's value, i have tried ABC->@total ABC->total ABC['total'] ABC['@total'] but nothing works. Ende Neu Wrap it into {} : $ABC->{"@total"}; // here it needs to insert quotes as well Also note that you have to prefix your class object with the dollar sign, this is the link to sandbox example. 来源: https://stackoverflow.com/questions/25217679/php-access-object-property-with-at-the-rate-symbol