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How can I initialize base class member variables in derived class constructor?
...rivate. You can't initialize them because they are not members of class B. If you made them public or protected you could assign them in the body of B::B().
– R Samuel Klatchko
Sep 13 '11 at 17:22
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Count the number of occurrences of a string in a VARCHAR field?
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there is no difference in using of LENGTH() and CHAR_LENGTH() while divided to same counting byte/char. @nicogawenda
– MohaMad
Mar 8 '17 at 22:26
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nginx upload client_max_body_size issue
...onnection, the client sends data to the closed socket, causing a TCP RST.
If your HTTP client supports it, the best way to handle this is to send an Expect: 100-Continue header. Nginx supports this correctly as of 1.2.7, and will reply with a 413 Request Entity Too Large response rather than 100 C...
Mongoose: Get full list of users
...
Well, if you really want to return a mapping from _id to user, you could always do:
server.get('/usersList', function(req, res) {
User.find({}, function(err, users) {
var userMap = {};
users.forEach(function(user) {
...
How to convert timestamp to datetime in MySQL?
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Use the FROM_UNIXTIME() function in MySQL
Remember that if you are using a framework that stores it in milliseconds (for example Java's timestamp) you have to divide by 1000 to obtain the right Unix time in seconds.
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How to transfer some data to another Fragment?
...ta (e.g. in onCreate() method) with:
Bundle bundle = this.getArguments();
if (bundle != null) {
int myInt = bundle.getInt(key, defaultValue);
}
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Markdown to create pages and table of contents?
...l-in-one
And to generate the TOC, open the command palette (Control/⌘+Shift+P) and select the Select Markdown: Create Table of Contentsoption.
Another option is the Markdown TOC plugin.
To install it, launch the VS Code Quick Open (Control/⌘+P), paste the following command, and press enter.
ex...
乐高 EV3 实验05 - 陀螺仪精确转向 · App Inventor 2 中文网
...sorValue() - 起始角)
标签_角度.Text = join(round(已转), "°")
if 已转 >= 目标角 - 3 {
EV3马达1.Stop(true)
计时器1.TimerEnabled = false
标签_状态.Text = join("完成，实际转了 ", round(已转), "°")
}
}
中途验证：点「右转 90°」，车原地...
How do I run a spring boot executable jar in a Production environment?
...gt;
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<executable>true</executable>
</configuration>
</plugin>
For Gradle add the following snippet to your buil...
AtomicInteger lazySet vs. set
What is the difference between the lazySet and set methods of AtomicInteger ? The documentation doesn't have much to say about lazySet :
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