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What does “abstract over” mean?
... def add(a: Product, b: Product) = Product(a.value * b.value)
}
val sumOf123 = mapReduce(List(1,2,3), Sum)
val productOf456 = mapReduce(List(4,5,6), Product)
We have abstracted over monoids and foldables.
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...但TaifunSQLite是收费的，美刀。
.aix 拓展下载：
cn.fun123.SQLite.aix
中文网测试案例
.aia 测试源码下载：
TestSqlite.aia
打开数据库
一般可以在屏幕初始化时打开db。如果数据库已打开，则不...
Client-server synchronization pattern / algorithm?
... a user's name has changed then the delta can be something like {revision: 123, name: "John Doe"}
– dipole_moment
Jan 3 '17 at 17:23
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Equation (expression) parser with precedence?
...p(1), pi: Math.atan2(1,1)*4 };
// input for parsing
// var r = { string: '123.45+33*8', offset: 0 };
// r is passed by reference: any change in r.offset is returned to the caller
// functions return the parsed/calculated value
function parseVal(r) {
var startOffset = r.offset;
var value;
...
What do
...use it with a Foo containing something other than a String:
scala> Foo(123).getStringLength
<console>:9: error: could not find implicit value for parameter evidence: =:=[Int,String]
You can read that error as "could not find evidence that Int == String"... that's as it should be! getStri...
Shared-memory objects in multiprocessing
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123
If you use an operating system that uses copy-on-write fork() semantics (like any common unix)...
Interface vs Base class
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123
Interfaces and base classes represent two different forms of relationships.
Inheritance (base...
How to highlight text using javascript
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<span>Test123äöüÄÖÜ</span>
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By the way, if you search in a database with LIKE,
e.g. WHERE textField LIKE CONCAT('%', @que...
What's the best CRLF (carriage return, line feed) handling strategy with Git?
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123
Don't convert line endings. It's not the VCS's job to interpret data -- just store and version...
SQLite Concurrent Access
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vcsjonesvcsjones
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