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Undefined reference to static class member
...uired, for example if it's address is used. push_back takes its parameter by const reference, and so strictly the compiler needs the address of your member and you need to define it in the namespace.
When you explicitly cast the constant, you're creating a temporary and it's this temporary which i...
Should I use int or Int32
...rive an enum from the Int32 is a designed behavior, which can also be seen by looking at the .NET code : [Serializable, ComVisible(true)] public abstract class Enum : ValueType, IComparable, IFormattable, Notice that Enum is derived from ValueType? If you attempt to derive an enum from something els...
How to trigger an event after using event.preventDefault()
...ome legacy form code that works, but you've been asked to enhance the form by adding something like email address validation before submitting the form. Instead of digging through the back-end form post code, you could write an API and then update your front-end code to hit that API first before all...
Vsphere 6 集群上 安装 oracle rac 遇到的共享磁盘故障 - 数据库(内核) - ...
...machine as described in
Disabling simultaneous write protection provided by VMFS using the multi-writer flag
然而在最佳实践一文中漏掉了ASM 创建磁盘组的过程。UDEV绑定这块没有描述。导致ORACLE 后面不能启动。
难道是可以直接使用吗？ 测试一...
Android 4.1: How to check notifications are disabled for the application?
...
Actually this is pretty easy to do:
/**
* Created by desgraci on 5/7/15.
*/
public class NotificationsUtils {
private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
public sta...
Install shows error in console: INSTALL FAILED CONFLICTING PROVIDER
...ogle_measurement_service
(in package com.company.appname) is already used by
com.company.otherInstalledAppName
The fix is to make sure that defaultConfig.applicationId is defined in android section of the build.gradle file for each project using your library
android {
defaultConfig.applicati...
How to create multidimensional array
...t="text" id="input8"/>
var els = [
[
document.getElementById('input5'),
document.getElementById('input6')
],
[
document.getElementById('input7'),
document.getElementById('input8')
]
];
els[0][0].id = 'input5';
els[0][1].id = 'input6';
els[1]...
Generate random number between two numbers in JavaScript
...bound is exclusive. To include our right bound we increase the right bound by 1 and floor the result.
function generateRandomInteger(min, max) {
return Math.floor(min + Math.random()*(max + 1 - min))
}
To get the random number
generateRandomInteger(-20, 20);
...
How to count TRUE values in a logical vector
...o it's kind of beta-release or something like that. I'll try to improve it by removing loops from code...
The main idea is to write a function that will take 2 (or 3) arguments. First one is a data.frame which holds the data gathered from questionnaire, and the second one is a numeric vector with c...
How to use sed/grep to extract text between two words?
...een Here and String, non-greedy (or lazy). However, the type of regex used by sed does not support lazy quantifiers (a ? immediately after .*) according to this Stackoverflow question. Usually to implement a lazy quantifier you would just match against everything except the token you didn't want to ...