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How to define “type disjunction” (union types)?
...e this:
object Bar {
def foo[T: StringOrInt](x: T) = x match {
case _: String => println("str")
case _: Int => println("int")
}
}
And that's it. You can call foo(5) or foo("abc"), and it will work, but try foo(true) and it will fail. This could be side-stepped by the client code...
Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Shell脚本编程30分钟入门linux_shell_30min_guides什么是Shell脚本示例看个例子吧：#! bin shcd ~mkdir shell_tutcd shell_tutfor ((i=0; i<10; i++)); do touch test_$i.txt...
什么是Shell脚本
示例
看个例子吧：
#!/bin/sh
cd ~
mkdir shell_tut
cd shell_tut
for (...
Printing 1 to 1000 without loop or conditionals
...5\n46\n47\n48\n49\n50\n51\n52\n53\n54\n55\n56\n57\n58\n59\n60\n61\n62\n63\n64\n65\n66\n67\n68\n69\n70\n71\n72\n73\n74\n75\n76\n77\n78\n79\n80\n81\n82\n83\n84\n85\n86\n87\n88\n89\n90\n91\n92\n93\n94\n95\n96\n97\n98\n99\n100\n101\n102\n103\n104\n105\n106\n107\n108\n109\n110\n111\n112\n113\n114\n115\n1...
How can I access and process nested objects, arrays or JSON?
...tation again to access the name property. So we eventually get:
const item_name = data.items[1].name;
Alternatively, we could have used bracket notation for any of the properties, especially if the name contained characters that would have made it invalid for dot notation usage:
const item_name ...
C#: Assign same value to multiple variables in single statement
...ssorTest
{
public AccessorTest(int value = default(int))
{
_Value = value;
}
private int _Value;
public int Value
{
get
{
Console.WriteLine("AccessorTest.Value.get {0}", _Value);
return _Value;
}
set
{
...
How to parse float with two decimal places in javascript?
I have the following code. I would like to have it such that if price_result equals an integer, let's say 10, then I would like to add two decimal places. So 10 would be 10.00.
Or if it equals 10.6 would be 10.60. Not sure how to do this.
...
How to set the UITableView Section title programmatically (iPhone/iPad)?
... requirement. I had a static table with static cells in my Main.storyboard(Base). To localize section titles using .string files e.g. Main.strings(German) just select the section in storyboard and note the Object ID
Afterwards go to your string file, in my case Main.strings(German) and insert th...
UnmodifiableMap (Java Collections) vs ImmutableMap (Google) [duplicate]
...ction, while UnmodifiableMap may. From the JavaDoc:
An immutable, hash-based Map with reliable user-specified iteration order. Does not permit null keys or values.
Unlike Collections.unmodifiableMap(java.util.Map), which is a view of a separate map which can still change, an instance of Imm...
How to do an instanceof check with Scala(Test)
... tiger shouldBe a [Tiger] is the current syntax scalatest.org/at_a_glance/FlatSpec
– jhegedus
May 16 '17 at 4:06
2
...
How do I obtain a Query Execution Plan in SQL Server?
...ion in the most convenient format.
SHOWPLAN_TEXT - Displays a basic text based estimated execution plan, without executing the query
SHOWPLAN_ALL - Displays a text based estimated execution plan with cost estimations, without executing the query
SHOWPLAN_XML - Displays an XML based estimated execu...