keyword

问题 In C#, identifiers such as int or string are actually language level keywords. What is the reason for that? Note that if the authors wanted to disallow user types with these names, that could have made that a semantic error, not syntax error. Some clarifications based on answers: They are keywords because it makes parsing possible/easier I do not see why, as I am developing a parser, and having Type.Rule = Identifier is much simpler than Type.Rule = Identifier | "int" | "string" | ... . They

问题 psql has a construct for passing named arguments: psql -v name='value' which can then be referenced inside a script: SELECT :name; which will give the result ?column? ---------- value (1 row) During development, I need to drop and recreate copies of the database fairly frequently, so I'm trying to automate the process. So I need to run a query that forcibly disconnects all users and then drops the database. But the database this operates on will vary, so the database name needs to be an

问题 My editor (TextMate) shows id in an other colour (when used as variable name) then my usual variable names. Is it a keyword? I don't want to shade any keyword... 回答1: id is not a keyword in Python, but it is the name of a built-in function. The keywords are: and del from not while as elif global or with assert else if pass yield break except import print class exec in raise continue finally is return def for lambda try Keywords are invalid variable names. The following would be a syntax error

问题 I have a dataframe df and it looks like this: id Type agent_id created_at 0 44525 Stunning 6 bedroom villa in New Delhi 184 2018-03-09 1 44859 Villa for sale in Amritsar 182 2017-02-19 2 45465 House in Faridabad 154 2017-04-17 3 50685 5 Hectre land near New Delhi 113 2017-09-01 4 130728 Duplex in Mumbai 157 2017-02-07 5 130856 Large plot with fantastic views in Mumbai 137 2018-01-16 6 130857 Modern Design Penthouse in Bangalore 199 2017-03-24 I've this tabular data and I'm trying to clean

问题 I have a dataframe df and it looks like this: id Type agent_id created_at 0 44525 Stunning 6 bedroom villa in New Delhi 184 2018-03-09 1 44859 Villa for sale in Amritsar 182 2017-02-19 2 45465 House in Faridabad 154 2017-04-17 3 50685 5 Hectre land near New Delhi 113 2017-09-01 4 130728 Duplex in Mumbai 157 2017-02-07 5 130856 Large plot with fantastic views in Mumbai 137 2018-01-16 6 130857 Modern Design Penthouse in Bangalore 199 2017-03-24 I've this tabular data and I'm trying to clean

问题 This is my controller $term = $request->get('q'); // return $request->q; $products = Post::whereHas('user', function($query) use($term) { $query->where('name', 'like', '%'.$term.'%'); })->orWhere('tags','LIKE','%'.$term.'%')->get(); return view('pages.search', compact('products','users')); This is working good for single keyword search. But I want to use it for multiple keywords. Like laravel php etc. Please guide me when I search multiple values like abc php laravel or anything then it

问题 I'm writing a test case in robot framework. I'm getting the response in below json string: {"responseTimeStamp":"1970-01-01T05:30:00", "statusCode":"200", "statusMsg":"200", "_object":{"id":"TS82", "name":"newgroup", "desc":"ttesteste", "parentGroups":[], "childGroups":[], "devices":null, "mos":null, "groupConfigRules" { "version":null, "ruleContents":null }, "applications":null,"type":0 } } From that I want to take "_object" using: ${reqresstr} = ${response['_object']} ... but am getting the

问题 I'm writing a test case in robot framework. I'm getting the response in below json string: {"responseTimeStamp":"1970-01-01T05:30:00", "statusCode":"200", "statusMsg":"200", "_object":{"id":"TS82", "name":"newgroup", "desc":"ttesteste", "parentGroups":[], "childGroups":[], "devices":null, "mos":null, "groupConfigRules" { "version":null, "ruleContents":null }, "applications":null,"type":0 } } From that I want to take "_object" using: ${reqresstr} = ${response['_object']} ... but am getting the

问题 I am trying to sum multiple rows together based on a keyword that is part of the index - but it is not the entire index. For example, the index could look like Count 1234_Banana_Green 43 4321_Banana_Yellow 34 2244_Banana_Brown 23 12345_Apple_Red 45 I would like to sum all of the rows that have the same "keyword" within them and create a total "banana" row. Is there a way to do this without searching for the keyword "banana"? For my purposes, this keyword changes every time and I would like to

问题 I am trying to sum multiple rows together based on a keyword that is part of the index - but it is not the entire index. For example, the index could look like Count 1234_Banana_Green 43 4321_Banana_Yellow 34 2244_Banana_Brown 23 12345_Apple_Red 45 I would like to sum all of the rows that have the same "keyword" within them and create a total "banana" row. Is there a way to do this without searching for the keyword "banana"? For my purposes, this keyword changes every time and I would like to