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问题 I have lots of tables and lots of relationships between them. When I try to make some join between them I'm stuck at finding the relationship between the two tables. For the sake of simplicity let's say I have Table A and Table B . They are linked with a foreign key. Q: How can I find the foreign key between this two exact tables and the column it references? And not all the tables or foreign keys that have a reference to this table. 回答1: You can join the data dictionary constraint-related

问题 This is my first post. I need string array validation such like below. [Required(ErrorMessage = "Content name is required")] public string[] ContentName { get; set; } I found a post which has the same situation. This answer and following code helped me so much and I could solve my problem. public class StringArrayRequiredAttribute : ValidationAttribute { protected override ValidationResult IsValid (object value, ValidationContext validationContext) { string[] array = value as string[]; if

问题 I'm wondering if its possible to write a javascript program and have it compiled and linked into an executable? If so would it be possible to create a libjs that would be the equivalent of libc for the c/c++ world? wouldn't creating something like this make javascript a full fledged language that could then be compiled and run directly on the target hardware? If you had a compiler for javascript, couldn't you write a new compiler in javascript? 回答1: Yes, you could write a js compiler. Not

问题 I'm wondering if its possible to write a javascript program and have it compiled and linked into an executable? If so would it be possible to create a libjs that would be the equivalent of libc for the c/c++ world? wouldn't creating something like this make javascript a full fledged language that could then be compiled and run directly on the target hardware? If you had a compiler for javascript, couldn't you write a new compiler in javascript? 回答1: Yes, you could write a js compiler. Not

问题 I have a CSV log file and it contains many rows like this: 2016-06-21 12:00:00,000 : helloworld: header1=2;header2=6;header=0 I want to write them to a new CSV file. public void readLogFile() throws Exception { String currentLine = ""; String nextLine = ""; BufferedReader reader = new BufferedReader(new FileReader(file(false))); while ((currentLine = reader.readLine()) != null) { if (currentLine.contains("2016") == true) { nextLine = reader.readLine(); if (nextLine.contains("helloworld") ==

问题 I want to delete all users from my MySQL database with specified name regardless to the host parameter. Here is what I wrote: DELIMITER ;; ## CREATING SCHEMA DROP SCHEMA IF EXISTS rms;; CREATE SCHEMA rms;; USE rms;; ## DROP USER DROP PROCEDURE IF EXISTS PREPARE_USERS;; CREATE PROCEDURE PREPARE_USERS() BEGIN DECLARE V_RECORD_NOT_FOUND INTEGER DEFAULT 0; DECLARE V_USER_HOST CHAR(60); DECLARE C_HOSTS_CURSOR CURSOR FOR SELECT host FROM mysql.user WHERE user='rms'; DECLARE CONTINUE HANDLER FOR NOT

问题 This is my first post. I need string array validation such like below. [Required(ErrorMessage = "Content name is required")] public string[] ContentName { get; set; } I found a post which has the same situation. This answer and following code helped me so much and I could solve my problem. public class StringArrayRequiredAttribute : ValidationAttribute { protected override ValidationResult IsValid (object value, ValidationContext validationContext) { string[] array = value as string[]; if

问题 I want to delete all users from my MySQL database with specified name regardless to the host parameter. Here is what I wrote: DELIMITER ;; ## CREATING SCHEMA DROP SCHEMA IF EXISTS rms;; CREATE SCHEMA rms;; USE rms;; ## DROP USER DROP PROCEDURE IF EXISTS PREPARE_USERS;; CREATE PROCEDURE PREPARE_USERS() BEGIN DECLARE V_RECORD_NOT_FOUND INTEGER DEFAULT 0; DECLARE V_USER_HOST CHAR(60); DECLARE C_HOSTS_CURSOR CURSOR FOR SELECT host FROM mysql.user WHERE user='rms'; DECLARE CONTINUE HANDLER FOR NOT

问题 I have an adapter and a spinner view which is set to use the adapter for it's entries. I'm adding items to adapter from a list of all files in /assets/ folder, I found that this task takes very long time (even about 2 seconds for a list of 2 files on a 1.5Ghz phone!). Then I came up to use a worker thread to gather my list and not block UI thread. here is my code: @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.settings);

问题 I have a variety of elasticsearch indices which are created daily by logstash with the format: "logstash-%{cluster_type}-%{cluster_name}-jobaccounting-v2-%{+YYYY.MM.dd}" I would like to create an alias in elasticsearch which drops the version number from the index name. I am planning to point my kibana instance at the aliased index rather than the versioned index so that I can change the version numbers without impacting kibana. index: "logstash-%{cluster_type}-%{cluster_name}-jobaccounting