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What does ||= (or-equals) mean in Ruby?
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174
This question has been discussed so often on the Ruby mailing-lists and Ruby blogs that there ...
In Scala, what exactly does 'val a: A = _' (underscore) mean?
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144
val a: A = _ is a compile error. For example:
scala> val a: String = _
<console>:1: ...
How to debug stream().map(…) with lambda expressions?
... the elements of the stream:
List<Integer> naturals = Arrays.asList(1,2,3,4,5,6,7,8,9,10,11,12,13);
naturals.stream()
.map(n -> n * 2)
.peek(System.out::println)
.collect(Collectors.toList());
UPDATE:
I think you're getting confused because map is an intermediate operation -...
[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue
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I am using VS2013, MVC 5.2.2.0, Web Api 2. I have just changed the all versions from 2.0.0.0 to 3.0.0.0 of the following section of Web.config resides inside the View folder of my project.
<configSections>
<sectionGroup name="syst...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
...法不能恢复你的数据。my.ini的设置为 innodb_file_per_table = 1。
参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html
1、找回表结构，如果表结构没有丢失直接到下一步
a、先创建一个数据库，这个数据库必须是没有表和任何操作的。...
How to install a specific JDK on Mac OS X?
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16 Answers
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Active
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Advantages of using prototype, vs defining methods straight in the constructor? [duplicate]
...alc = function (a, b) {
return a + b;
}
// Create 2 instances:
var ins1 = new Class(),
ins2 = new Class();
// Test the calc method:
console.log(ins1.calc(1,1), ins2.calc(1,1));
// -> 2, 2
// Change the prototype method
Class.prototype.calc = function () {
var args = Array.prototype...
How to get index using LINQ? [duplicate]
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130
An IEnumerable is not an ordered set.
Although most IEnumerables are ordered, some (such as Di...
Generate a UUID on iOS from Swift
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edited Feb 23 at 10:34
Tilak Maddy
2,64922 gold badges2121 silver badges4040 bronze badges
answ...
Why is the gets function so dangerous that it should not be used?
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11 Answers
11
Active
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