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Declare multiple module.exports in Node.js
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module.js:
const foo = function(<params>) { ... }
const bar = function(<params>) { ... }
//export modules
module.exports = {
foo,
bar
}
main.js:
// import modules
var { foo, bar } = require('module');
// pass your p...
How can I tell when a MySQL table was last updated?
In the footer of my page, I would like to add something like "last updated the xx/xx/200x" with this date being the last time a certain mySQL table has been updated.
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Is key-value observation (KVO) available in Swift?
...Object subclass. Consider that you wanted to observe the bar property of a Foo class. In Swift 4, specify bar as dynamic property in your NSObject subclass:
class Foo: NSObject {
@objc dynamic var bar = 0
}
You can then register to observe changes to the bar property. In Swift 4 and Swift 3.2...
Difference between Hive internal tables and external tables?
...r node it uses to keep track of state.
For instance, when you CREATE TABLE FOO(foo string) LOCATION 'hdfs://tmp/';, this table schema is stored in the database.
If you have a partitioned table, the partitions are stored in the database(this allows hive to use lists of partitions without going to th...
eval command in Bash and its typical uses
...able substitutions and command substitutions (i.e. anytime there's a $): "$foo", "$(foo)". Always put double quotes around variable and command substitutions, unless you know you need to leave them off. Without the double quotes, the shell performs field splitting (i.e. it splits value of the variab...
How to capitalize the first letter of word in a string using Java?
Example strings
25 Answers
25
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How to pass the value of a variable to the stdin of a command?
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But why? Also, I can't reproduce any problems: foo1=-; foo2='"'; foo3=\!; cat<<<"$foo1"; cat<<<"$foo2"; cat<<<"$foo3" works fine for me. What exactly do the three " do? AFAIK you are just prepending and appending an empty string.
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使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
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使用App Inventor扩展实现多点触控：Scale Detector
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草稿（9 月 13 日）：构建扩展需要 App Inventor Extensions 功能，该功能尚未合并到 App Inventor 版本中。 但是你可以使用...
How to create enum like type in TypeScript?
...lor);
console.log(Color[this.myColor]);
}
}
}
var foo = new myModule.MyClass();
This will log:
undefined
2
Blue
Because, at the time of writing this, the Typescript Playground will generate this code:
var myModule;
(function (myModule) {
(function (Color)...
How can I specify a local gem in my Gemfile?
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I believe you can do this:
gem "foo", path: "/path/to/foo"
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