specifications

MySQL “binary” vs “char character set binary”

由 ぃ、小莉子 提交于 2020-01-22 13:46:07
问题 What's the difference between binary(10) vs char(10)character set binary ? And varbinary(10) vs varchar(10)character set binary ? Are they synonymous in all MySQL engines? Is there any gotcha to watch out for? 回答1: There isn't a difference. However, there is a caveat if you're storing a string. If you only want to store a byte array or other binary data such as a stream or file then use the binary type as that is what they are meant for. Quote from the MySQL manual: The use of CHARACTER SET

Specification Document: DOM Text Nodes

由 六月ゝ 毕业季﹏ 提交于 2020-01-15 12:14:29
问题 I am reading a document about HTML5. A few lines down from where I linked, a sample DOM tree is displayed for the sample HTML code given. Why is there no text node directly before the <head> element? Why is there no text node between the DOCTYPE and <html> nodes? Error or feature? 回答1: Feature. The main reason is that, given the markup <!DOCTYPE html> <html> <head> <title>Sample page</title> ..., some people expect document.documentElement.firstChild to return the head element. However, if

Specification Document: DOM Text Nodes

由 ╄→гoц情女王★ 提交于 2020-01-15 12:09:16
问题 I am reading a document about HTML5. A few lines down from where I linked, a sample DOM tree is displayed for the sample HTML code given. Why is there no text node directly before the <head> element? Why is there no text node between the DOCTYPE and <html> nodes? Error or feature? 回答1: Feature. The main reason is that, given the markup <!DOCTYPE html> <html> <head> <title>Sample page</title> ..., some people expect document.documentElement.firstChild to return the head element. However, if

what do the square brakets mean in vb.net in this string

由 冷暖自知 提交于 2020-01-15 11:54:42
问题 What do the square brakets mean in vb.net in this variable below defining as [String] Dim client As New WebClient() Dim htmlCode As [String] = client.DownloadString("http://www.stackoverflow.com") 回答1: It's useless in your example. Brackets are there to use reserved keywords for what they aren't, for example Dim [String] = "asdf" which will create a var named "String" (which is stupid, but...) 回答2: It allows you to use a reserved word in your code. There is some mis-information about this as

what do the square brakets mean in vb.net in this string

由 对着背影说爱祢 提交于 2020-01-15 11:54:29
问题 What do the square brakets mean in vb.net in this variable below defining as [String] Dim client As New WebClient() Dim htmlCode As [String] = client.DownloadString("http://www.stackoverflow.com") 回答1: It's useless in your example. Brackets are there to use reserved keywords for what they aren't, for example Dim [String] = "asdf" which will create a var named "String" (which is stupid, but...) 回答2: It allows you to use a reserved word in your code. There is some mis-information about this as

Does the order of fields in C# matter?

由 廉价感情. 提交于 2020-01-14 12:55:12
问题 This question is inspired by Jon Skeet's answer: Is there a c# equivalent to c++'s access-modifier regions He makes a comment that it is possible for the order of fields in a file to matter. I am guessing that this has to do with the order that the fields are initialized, but I think it's a dangerous enough thing to code based on this side effect that it warranted its own question and discussion. Are there other thoughts around how the order of fields within your code file could be

Does the order of fields in C# matter?

由 随声附和 提交于 2020-01-14 12:53:31
问题 This question is inspired by Jon Skeet's answer: Is there a c# equivalent to c++'s access-modifier regions He makes a comment that it is possible for the order of fields in a file to matter. I am guessing that this has to do with the order that the fields are initialized, but I think it's a dangerous enough thing to code based on this side effect that it warranted its own question and discussion. Are there other thoughts around how the order of fields within your code file could be

Scala Spec2 Mockito: Argument matchers with complex types

由 泪湿孤枕 提交于 2020-01-13 23:29:34
问题 I'm trying to write a mock for a web service with Mockito. The mock should simulate a POST request using the play WS library. /** * Mock for the Web Service */ case class WSMock() extends Mockito { val wsRequestHolder: play.api.libs.ws.WS.WSRequestHolder = mock[play.api.libs.ws.WS.WSRequestHolder] val wsResponse: play.api.libs.ws.Response = mock[play.api.libs.ws.Response] wsResponse.status returns 200 wsResponse.body returns "BODY RESP FROM WS" val futureResponse = scala.concurrent.Future {

CSS Spec - Atomic Inline Level Boxes

由 爷，独闯天下 提交于 2020-01-10 20:01:36
问题 I'm trying to wrap my brain around some of the finer points of CSS and I found this portion of this excerpt from the W3 CSS Visual Formatting Spec 9.2.2 particularly obtuse: Inline-level boxes that are not inline boxes (such as replaced inline-level elements, inline-block elements, and inline-table elements) are called atomic inline-level boxes because they participate in their inline formatting context as a single opaque box . What exactly do they mean by single opaque box? Any clarification

Is RETURN from constructor necessary when creating object with new

由 ≯℡__Kan透↙ 提交于 2020-01-09 19:23:27
问题 if I have function like this: function Apple(){ this.color = "green"; return this; } When creating object like this: var my_obj = new Apple(); is that line return this; necessary and/or is it valid by language reference? 回答1: No, returning this is not necessary, but it is valid. If the returned value is an object, new will return that object instead of the newly created object. See points 11.2.2 and 13.2.2 of ECMAScript 5: The new operator calls the internal [[Construct]] method on the
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