keyword

问题 I just figured that I can use the this keyword in an interface . So, if this keyword represents current class object reference in a class , then what does it represent in an interface ? interface InterfaceOne { default void display() { this.defaultMethod(); System.out.println("InterfaceOne method displayed"); } default void defaultMethod() { System.out.println("defaultMethod of InterfaceOne called"); } } 回答1: Even in this case, the this keyword is used in the same context and meaning. One

问题 When my users search for content on my website I echo $title, $content where like $keyword The search function implemented works correctly but, because each content field in my database contains quite a few paragraphs of text it makes it hard for users to read when the results are displayed on the page. I would like the user to search for the keyword entered and then in the results displayed, chop the text some number of letters before and after the keyword and highlight it? I have read that

问题 I'm using the big query to see the data in my google cloud. I want to search a keyword in all columns of a particular table. Ex: I'm searching for Dubai. I need the result of entries where ever the Dubai word present in any column. 回答1: Below is for BigQuery Standard SQL and assumes column names do not contain search word (can be adjusted to address this too) #standardSQL SELECT * FROM `yourproject.yourdataset.yourtable` t WHERE REGEXP_CONTAINS(LOWER(TO_JSON_STRING(t)), r'dubai') You can test

问题 I work with some advanced JavaScript people and they have used the SUPER keyword in their code. I admit, I don't have a good grasp of how and why one can and would use this. Can someone direct me or show me how to become well versed in its usage and reasoning thereof? Here are some examples: openup: function( $super ) { $super(); this.shop.enable_access(); } addLeft: function( data ) { var cell = Element('td'); if ( data.item_data ) { var item = new SRIL(data.item_data); item.attach(cell);

问题 About a month ago YouTube decided to get rid of it's "tags" from the frontend of their website: http://youtubecreator.blogspot.com/2012/08/tags-removed-from-video-watch-pages.html Which also in turn left media:keywords blank through any API feed request as read here: http://apiblog.youtube.com/2012/08/video-tags-just-for-uploaders.html The nice thing was for another month or so (until a few days ago) you could still access a video's "tags" or "keywords" through the API by looping through the

问题 Retrieving the order of key-word arguments passed via **kwargs would be extremely useful in the particular project I am working on. It is about making a kind of n-d numpy array with meaningful dimensions (right now called dimarray), particularly useful for geophysical data handling. For now say we have: import numpy as np from dimarray import Dimarray # the handy class I am programming def make_data(nlat, nlon): """ generate some example data """ values = np.random.randn(nlat, nlon) lon = np

问题 I was thinking about this recently since Python 3 is changing print from a statement to a function. However, Ruby and CoffeeScript take the opposite approach, since you often leave out parentheses from functions, thereby blurring the distinction between keywords/statements and functions. (A function call without parentheses looks a lot like a keyword.) Generally, what's the difference between a keyword and a function? It seems to me that some keywords are really just functions. For example,

问题 I would like to know what's the advantadge or usefulness of using ENABLE keyword, in statements like: CREATE TABLE "EVALUATION" ( "EVALUATION_ID" NUMBER(20, 0) NOT NULL ENABLE, or ALTER TABLE "EVALUATION" ADD CONSTRAINT("EVALUATION_FK") FOREIGN KEY ("CREW_ID") REFERENCES "CREW" ("CREW_ID") ENABLE; For what I read in the documentation, ENABLE is on by default. Could I assume it's just to enable something that has been previously disabled? 回答1: Constraint doc: CREATE TABLE "EVALUATION" (

问题 I have an application in Access 2003 that I am working on. In it, I have an employee table, which is connected to two other tables. The two connected tables are tables that hold a few fixed KeyWords. In my main employee table, I just have the ID from the other table, rather than having the whole word. I wanted to make a form for entering data into these tables, so I made a query from the three tables that shows the all the regular fields of the employee table except instead of those two ID's,

问题 Most keywords in C (or in any language for that matter) starts with a letter. But there are some keywords that starts with an underscore? They keywords are: _Alignas , _Alignof , _Atomic , _Bool , _Complex , _Generic , _Imaginary , _Noreturn , _Static_assert and _Thread_local . I find it amazingly strange. If it was a hidden global constant or internal function that's not really a part of the API, I would understand it. But these are keywords . I find it extra strange when C actually have a