specifications

问题 I've followed the steps in this article to arrange my page for printing. However, only a couple of things seem to actually work. I can't get selectors such as @top-center to work at all in Chrome, Firefox or Opera, even though caniuse says it should work in most major browsers. Has this been quietly abandoned or deprecated? I'm pretty sure it's correct, but I'll post my CSS here for reference anyway: @page { @bottom-right { content: "..."; } } The content doesn't show up anywhere. 回答1: The WD

问题 I've followed the steps in this article to arrange my page for printing. However, only a couple of things seem to actually work. I can't get selectors such as @top-center to work at all in Chrome, Firefox or Opera, even though caniuse says it should work in most major browsers. Has this been quietly abandoned or deprecated? I'm pretty sure it's correct, but I'll post my CSS here for reference anyway: @page { @bottom-right { content: "..."; } } The content doesn't show up anywhere. 回答1: The WD

问题 Code in question: a = 'test' # 1) print(f'{a}') # test # 2) print(f'{ {a} }') # {'test'} # 3) print(f'{{ {a} }}') # {test} My question is, why does case two print those quotes? I didn't find anything explicitly in the documentation. The closest thing I found detailing this was in the PEP for this feature: (the grammar for F-strings) f ' <text> { <expression> <optional !s, !r, or !a> <optional : format specifier> } <text> ... ' The expression is then formatted using the format protocol, using

问题 Today I ran into an issue that top is a pre-existing global variable. const left = 1; const right = 2; const top = 3; const bottom = 4; console.log(left, right, top, bottom); result: Uncaught SyntaxError: Identifier 'top' has already been declared I think I've just been lucky until today that most of the time my usage of a variable called top was inside a function. How much do I need to worry about browsers adding new global variables that will break code in the future? It seems like until

问题 According to the spec, the value for grid-area is grid-line, which further uses custom-ident. Then MDN states that identifies cannot be put between quotes, which will make it a string value, which by itself is reasonable. But adding these all up, named grid areas must be accessed via an ID without quotes. See the comparison in the example below: .grid { display:grid; grid: "a b" 1fr "c d" 1fr / 1fr 1fr; } .foo { /* this works just fine, putting it to area b in upper right corner */ grid-area:

问题 According to the spec, the value for grid-area is grid-line, which further uses custom-ident. Then MDN states that identifies cannot be put between quotes, which will make it a string value, which by itself is reasonable. But adding these all up, named grid areas must be accessed via an ID without quotes. See the comparison in the example below: .grid { display:grid; grid: "a b" 1fr "c d" 1fr / 1fr 1fr; } .foo { /* this works just fine, putting it to area b in upper right corner */ grid-area:

问题 I am using Access 2007 and I wish to be able to export my data to a text file while having the export specifications to allow me to use a '.' instead of a comma or the other default characters given to me. Is this possible? 回答1: here's one way of doing it: select the table/query you want to export on the navigation pane right-click your table/query and select "Export" > "Text File" (or click the "Text File" button on the "Export" section of the "External Data" tab of the ribbon. choose a

问题 I'm using Spring Boot with Spring JPA and Specification Executor. I have my Specification/Predicate combo successfully searching the simple attributes within my class. However, I am having difficulties searching the objects within. Do they need a separate Specification? I have a class that has 2 Many To One mapping classes within and would like to search those fields from within the same class. Predicate Implementation public Specification<User> getSpecification(SpecificationField field,

问题 I'm using Spring Boot with Spring JPA and Specification Executor. I have my Specification/Predicate combo successfully searching the simple attributes within my class. However, I am having difficulties searching the objects within. Do they need a separate Specification? I have a class that has 2 Many To One mapping classes within and would like to search those fields from within the same class. Predicate Implementation public Specification<User> getSpecification(SpecificationField field,

问题 This GridLayout is going in my app that has a lot of levels. Each level has a different number of rows and columns. I assume that this GridLayout would be my best bet to use to satisfy my needs. Also, all need to be done at runtime prorammatically. I am having trouble understanding how to use GridLayout.spec() . I am trying to follow this excellent example but just cannot grasp it fully. Let's say, for example, I want a GridLayout with 3 columns and 4 rows. GridLayout.LayoutParms params1 =