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• View all foreign key constraints for entire MySQL database

  - by Scott Wolf

  I have a large database with over 150 tables that I've recently been handed. I'm just wondering if there is an easy way to view all foreign key constraints for the entire DB instead of on a per-table basis.

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• How to make a foreign key connect with sqlite3 and Ruby on Rails

  - by Trip

  Does anyone know the way, or a place where I can find out how to do this? Basically, all I want to do is connect a foreign key between two tables. Is it true, that all I have to do is write the "belongs_to" and "has many" ?

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• [iPhone app] Detecting which key has been pressed in UITextField

  - by Dough

  Hi, I have an UITextField object in my view and want to launch a method when user press backspace button and textField is empty. First I have to do is to create a cursor storing text length, so when cursor changes from 1 to 0 there is nothing to do. The only way to launch the method is when text length is 0 - press backspace - remain to 0. How to catch the event of pressing the backspace key in my UITextField ? Thanks in advance !

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• Java - get index of key in HashMap?

  - by llm

  In java if I am looping over the keySet() of a HashMap, how do I (inside the loop), get the numerical index of that key? Basically, as I loop through the map, I want to be able to get 0,1,2...I figure this would be cleaner than declaring an int and incrementing with each iteration. Thanks.

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• Cannot add or update a child row: a foreign key constraint fails

  - by sarah

  Hi All, i am having a user table which has desname as FK referring to des table ,i am trying to add desname in user but i am gettng Cannot add or update a child row: a foreign key constraint fails error. desname is prepopulated and i am selected the same for he user.Where i am doing wrong I ma using mysql and hibernate hbm

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• what are some key differences between mvc1 and mvc2

  - by Fraz Sundal

  what are some key differences between mvc1 and mvc2. I have to adopt any one so i am unable to decide that is mvc2 have some really good features that mvc1 is missing.

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• Wait For Return Key Press Using Java Scanner

  - by Gordon

  What would be the best way to wait for a return key press from the user using the Java Scanner Class? In a command line tool I would like the user to confirm before carrying out an action. Please correct me if there a more standard way of doing this in a command line tool.

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• Detect if a key is bound to something in vim

  - by WishCow

  I'd like to know if there is a way to figure out if a key does something in vim. I know that I can use :map to see user-defined mappings, but is there something for the built-in stuff? For example, I always had CTRL-W bound to close tab, because I thought that it was unused. After half a year, I found out that there are some sequences that use it, like CTRL-W CTRL-S to split the window, and it was a nightmare to retrain myself.

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• In flex, make all buttons be pressed with return key

  - by zombiegx

  Buttons in flex can be pressed with the space key, but a client would like to press enter instead of space. This can be achieved by programming each button, but it would be very time consuming. Does anyone have an idea how to do this in the less amount of time? thanks.

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• on click evnt need to preess escape key...using jquery

  - by kumar

  is that possible to on click evnt to i need to do Escape key click? using jquery?

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• UNIQUE and PRIMARY KEY

  - by ultrajohn

  Does declaring an attribute of a table as UNIQUE equivalent to declaring it as PRIMARY KEY? tnx a lot!

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• Detect Shift key at any point during the execution of a console app

  - by adam0101

  I would like to have my console app that runs for a while to give some options to the user at the end if at anytime during the process the user pressed the shift key. Is this possible?

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• get dictionary key by value

  - by loviji

  how to get a Dictionary key by value in C#? Dictionary<string, string> types = new Dictionary<string, string>() { {"1", "one"}, {"2", "two"}, {"3", "three"} }; I want simething like this: getByValueKey(string value); getByValueKey("one") must be return "1". What is the best way do this? may be HashTable, SortedLists?

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• Python: if key in dict vs. try/except

  - by LeeMobile

  I have a question about idioms and readability, and there seems to be a clash of Python philosophies for this particular case: I want to build dictionary A from dictionary B. If a specific key does not exist in B, then do nothing and continue on. Which way is better? try: A["blah"] = B["blah"] except KeyError: pass or if "blah" in B: A["blah"] = B["blah"] "Do and ask for forgiveness" vs. "simplicity and explicitness". Which is better and why?

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• How to specifiy key size in the CertCreateSelfSignCertificate function

  - by sako73

  I am using the function CertCreateSelfSignCertificate (http://msdn.microsoft.com/en-us/library/aa376039(VS.85).aspx) to generate a certificate. I need to specify the key size to be 2048. I do not see how to provide this parameter. I would appreciate any help in this matter. Thanks.

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• can I have an abstract base class with the key attribute being generic

  - by Greg

  Hi, I want to create a re-usable library. I was going to use extension methods however I run into some issues in some cases for the client to have to specify in the calling method the types. QUESTION - If I use an abstract base class as the basis, can I specify an attribute/property in the class to be generic (e.g. the key property might be an 'int' in one case, or a 'string' in another)?

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• perl - getting a value from a map where the key has a dot

  - by imerez

  I have a map in perl which has been dumped into from some legacy code the name of the key has now changed from simply reqHdrs to reqHdrs.bla $rec->{reqHdrs.bla} My problem is now I cant seem to access this field from the map any ideas ? The following is my error Download Script Output: Bareword "reqHdrs" not allowed while "strict subs" in use

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• How to access key itself using javascript

  - by Wondering

  Hi All, I have a json like: var xx= {'name':'alx','age':12}; now i can read the value of name which is 'alx' as xx[0].name, but how to retrieve value of 'name' itself, means how i can fetch Key @ run time. Please let me know if my question is not clear and you guys want more info. Thanks.

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• [jquery] e.which code for escape key

  - by Shishant

  I have two functions. When enter is pressed the functions runs correctly but when escape is pressed it doesn't. What's the correct number for the escape key? $(document).keypress(function(e) { if (e.which == 13) { $('.save').click(); } // enter (works as expected) if (e.which == 27) { $('.cancel').click(); } // esc (does not work) });

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• Populate a vector with all multimap values with a given key

  - by John

  Given a multimap<A,B> M what's a neat way to create a vector<B> of all values in M with a specific key. e.g given a multimap how can I get a vector of all strings mapped to the value 123? An answer is easy, looping from lower-upper bound, but is there a neat loop-free method?

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• Shortcut key to restart server in Eclipse

  - by weesilmania

  So Ctrl/Cmd-F11 starts the server, but is there a key to restart the server? I'm developing using app engine and GWT if that makes any difference (I suspect not).

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• Problem using Add key value in app.config of c# windows application

  - by srk

  I am trying to use the below in my app.config <add key="InstanceID" value="HID\VID_413C&PID_3200\6&227E6ED3&0&0000" /> It shows error in app.config, what is the problem ? i want to use this value as string in my c# code.

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• Need a distributed key-value lookup system in PHP

  - by user198729

  This question asks for one in java, what's the best candidate in PHP? BTW,does the following establish: distributed key value store == distributed cache ?

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• Open SSL generate Private Key with password from File

  - by Data-Base

  Hello, I have this command openssl genrsa -des3 -out host.key 1024 it asks me for a password, I want to automate it! how I can make it read the password from a text file (host.pass) so it will not ask me or have it ignore the password (which one is better?) Thanks

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• How to represent "ALL" in Primary Key -foreign Key relationship.

  - by Rohit

  I have to create a db design to store blacklisted fax numbers. I have created a table and one column of this table is customerID which is a foreign key to table Customer. Now i want to have a faxnumber which is blacklisted for all customers. How should i proceed with this. Should i use Null in this case. Please provide options

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