syntax

问题 This is what I'm inputting: type = 'filename' im.save(type, '.png') and what this is supposed to do is save the file in a .png format but with the variable as the name, I'm just not 100% sure how the format/syntax is supposed to be laid out. Is it the same as if I wanted to print the variable: Print(type, "This shows up beside the type I think") edit, Don't pay to much attention to the list, it's mostly there as an example. I not sure how to have a variable right beside a Plain text word like

问题 This is more a theoretical question than a practical one. It's about the parsing of some code delimited by curly braces. Here are two examples of object initializers : f({}); ({a:3}) Here are two examples of blocks : ;{} {a:3;} In practice, it seems that {...} makes a block apart if the precedent code requires an expression. But I've never seen such a rule explicit or made obvious in the ECMAScript specification and I'm not even sure it's true. Is there a definitive non ambiguous reference

问题 This is more a theoretical question than a practical one. It's about the parsing of some code delimited by curly braces. Here are two examples of object initializers : f({}); ({a:3}) Here are two examples of blocks : ;{} {a:3;} In practice, it seems that {...} makes a block apart if the precedent code requires an expression. But I've never seen such a rule explicit or made obvious in the ECMAScript specification and I'm not even sure it's true. Is there a definitive non ambiguous reference

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 6 years ago . Recently I've been getting into MVC3 and Razor, and reading several articles about these topics to better understand the concept. I've been reading Scott Guthrie's Blog Post, in which he provides the following 2 examples. The first being ASPX syntax, the second being Razor

问题 In GNU/Linux I would do: PROGPATH=/long/and/complicated/path/to/some/bin $PROGPATH/program args... but in Powershell if I try this: $PROGPATH=\long\and\complicated\path\to\some\bin $PROGPATH\program args... I get: At script.ps1:2 char:... + $PROGPATH\program args ... + ~~~~~~~~ Unexpected token '\program' in expression or statement. + CategoryInfo : ParserError: (:) [], ParseException + FullyQualifiedErrorId : UnexpectedToken So how do I do this simple thing I know how to do in bash, in

问题 I understand that, using ES6 syntax, a function can be made that takes an object as a parameter and that parameter can have a default value, like so: function exampleFunction(objParam = {val1: 1, val2: 2}) { //... } If I call exampleFunction() , objParam is given the default value. However, if I call exampleFunction({val1: 3}) , objParam.val2 is undefined . This makes sense, because the default isn't being applied. Is there any way I can make sure that objParam.val2 does have a value, using

问题 I understand that, using ES6 syntax, a function can be made that takes an object as a parameter and that parameter can have a default value, like so: function exampleFunction(objParam = {val1: 1, val2: 2}) { //... } If I call exampleFunction() , objParam is given the default value. However, if I call exampleFunction({val1: 3}) , objParam.val2 is undefined . This makes sense, because the default isn't being applied. Is there any way I can make sure that objParam.val2 does have a value, using

问题 I understand that, using ES6 syntax, a function can be made that takes an object as a parameter and that parameter can have a default value, like so: function exampleFunction(objParam = {val1: 1, val2: 2}) { //... } If I call exampleFunction() , objParam is given the default value. However, if I call exampleFunction({val1: 3}) , objParam.val2 is undefined . This makes sense, because the default isn't being applied. Is there any way I can make sure that objParam.val2 does have a value, using

问题 How do I query MongoDB for nearby geographic points using the C# driver and the GeoNear method? The following returns points with an incorrect Distance value: var results = myCollection.GeoNear( Query.GT("ExpiresOn", now), // only recent values latitude, longitude, 20 ); I suspect I should be telling Mongo to query on the double[] Location field, but I don't know the query syntax. 回答1: Found the answer via this and this: var earthRadius = 6378.0; // km var rangeInKm = 3000.0; // km

问题 How do I query MongoDB for nearby geographic points using the C# driver and the GeoNear method? The following returns points with an incorrect Distance value: var results = myCollection.GeoNear( Query.GT("ExpiresOn", now), // only recent values latitude, longitude, 20 ); I suspect I should be telling Mongo to query on the double[] Location field, but I don't know the query syntax. 回答1: Found the answer via this and this: var earthRadius = 6378.0; // km var rangeInKm = 3000.0; // km