Restricting child/field access with security rules

Restricting child/field access with security rules

I'm writing an app that allows users to submit nominations which are moderated before being displayed to other users. This requires a number of restrictions I've so far been unsuccessful in implementing with security rules:Hide any nominati

SQL split values to multiple rows

SQL split values to multiple rows

I have table :id | name 1 | a,b,c 2 | bi want output like this :id | name 1 | a 1 | b 1 | c 2 | b 1:If you can create a numbers table, that contains numbers from 1 to the maximum fields to split, you could use a s

What is the most efficient method to groupby on a JavaScript array of objects?

What is the most efficient method to groupby on a JavaScript array of objects?

What is the most efficient way to groupby objects in an array?For example, given this array of objects:[ { Phase: "Phase 1", Step: "Step 1", Task: "Task 1", Value: "5" }, { Phase: "Phase 1", Step: "Step 1", Task: "Task 2", Value: "10

What is the best way to implement “remember me” for a website? [closed]

What is the best way to implement “remember me” for a website? [closed]

I want my website to have a checkbox that users can click so that they will not have to log in each time they visit my website. I know I will need to store a cookie on their computer to implement this, but what should be contained in that c

Why does Date.parse give incorrect results?

Why does Date.parse give incorrect results?

Case One:new Date(Date.parse("Jul 8, 2005"));Output:Fri Jul 08 2005 00:00:00 GMT-0700 (PST)Case Two:new Date(Date.parse("2005-07-08"));Output:Thu Jul 07 2005 17:00:00 GMT-0700 (PST)Why is the second parse incorrect? 1:Until the 5th editi

Syntax error due to using a reserved word as a table or column name in MySQL

Syntax error due to using a reserved word as a table or column name in MySQL

I'm trying to execute a simple MySQL query as below:INSERT INTO user_details (username, location, key)VALUES ('Tim', 'Florida', 42)But I'm getting the following error: You have an error in your SQL syntax; check the manual that corresponds

In C++11, can the characters in the array pointed to by string::c_str() be altered?

In C++11, can the characters in the array pointed to by string::c_str() be altered?

std::string::c_str() returns a pointer to an array that contains a null-terminated sequence of characters (i.e., a C-string) representing the current value of the string object.In C++98 it was required that "a program shall not alter any of

Finding the hash value of a row in postgresql

Finding the hash value of a row in postgresql

Is there a way to get the hash code of a row in postgresql? I need to export some data only if there is some changes in the data after the last export, the last exported data rows can be stored in a table, the when the again I need to expo

Getting the fractional part of a float without using modf()

Getting the fractional part of a float without using modf()

I'm developing for a platform without a math library, so I need to build my own tools. My current way of getting the fraction is to convert the float to fixed point (multiply with (float)0xFFFF, cast to int), get only the lower part (mask w

“Flattening” a list of dictionaries

“Flattening” a list of dictionaries

So my aim is to go from:fruitColourMapping = [{'apple': 'red'}, {'banana': 'yellow'}]to finalMap = {'apple': 'red', 'banana': 'yellow'}A way I got is: from itertools import chain fruits = list(chain.from_iterable([d.keys() for d in fruitCo

Programmatically Inserting New Android Contacts into Phone

Programmatically Inserting New Android Contacts into Phone

I am writing an app that lets the user remove contacts from their Android device and store them in a separate database. They should also be able to restore the contacts to their phone, but I am having trouble with this part. I retrieve the

Redux - How to add entry to array in reducer

Redux - How to add entry to array in reducer

I stuck with this bit and I can't progress - I guess solution is simple but I can't figure out. I'm trying to add entry in reducer so data in in would look something this:state = { entryId: { entryName: ["something", "something2", "some

Why Object#hashCode() returns int instead of long

Why Object#hashCode() returns int instead of long

why not:public native long hashCode();instead of: public native int hashCode();for higher chance of achieving unique hash codes? 1:Because the maximum length of an array is Integer.MAX_VALUE. Since the prime use of hashCode() is to deter

What are the implications of running python with the optimize flag?

What are the implications of running python with the optimize flag?

I cannot seem to find a good simple explanation of what python does differently when running with the -O or optimize flag. 1:assert statements are completely eliminated, as are statement blocks of the form if __debug__: ... (so you can

Split/explode comma delimited string with Sybase SQL Anywhere [duplicate]

Split/explode comma delimited string with Sybase SQL Anywhere [duplicate]

This question already has an answer here: How do I split a string so I can access item x? 40 answers UPDATE: Someone marked this question as du

secure sessions/cookies in php

secure sessions/cookies in php

I have a question about sessions. How do you make a secure login session/cookie.I was looking at this example where they add this array to the session:$data = array{ username = $_POST['username']; is_logged = true;}I was wondering if

get object from memory by hash code

get object from memory by hash code

My question is relate to security level of JVMHow we can we get the object from memory by proving hash code?Today i was thinking. I create an object of class A in an execution environment One. And get the hash code from here of that object.

Sitecore - Indexing data from presentation components with non-context datasources

Sitecore - Indexing data from presentation components with non-context datasources

I have a Sitecore site where many of the pages are assembled mainly from various sublayouts pointing at datasources elsewhere in the content tree.Here's a basic example of the problem. Someone viewing a page about apples might see the word

Visual Studio Settings file - how does it work?

Visual Studio Settings file - how does it work?

I do not understand the following things:What is the difference between app.config (applicationname.exe.config) and settings file ?I am unable to locate the *.settings file in Windows7 AppData directory under the specific account (I heard t

Converting Int to Float/Float to Int using Bitwise

Converting Int to Float/Float to Int using Bitwise

I was wondering if you could help explain the process on converting an integer to float, or a float to an integer. For my class, we are to do this using only bitwise operators, but I think a firm understanding on the casting from type to ty

How to export credentials from one jenkins instance to another?

How to export credentials from one jenkins instance to another?

I am using the credentials plugin in Jenkins to manage credentials for git and database access for my team's builds. I would like to copy the credentials from one jenkins instance to another, independent jenkins instance. How would I go abo

Test if point is in some rectangle

Test if point is in some rectangle

I have a large collection of rectangles, all of the same size. I am generating random points that should not fall in these rectangles, so what I wish to do is test if the generated point lies in one of the rectangles, and if it does, genera

Detecting integral overflow with scanf

Detecting integral overflow with scanf

When recently answering another question, I discovered a problem with code like:int n;scanf ("%d", &n);With strtol, you can detect overflow because, in that case, the maximum value allowed is inserted into n and errno is set to indicate the

Storing blobs in external location using built-in CoreData option

Storing blobs in external location using built-in CoreData option

I have managed objects that have image properties. Since storing large blobs in CoreData is a bad idea, I'm trying to use the built-in CoreData option "Store in External Record File" which you can see in the Data Model Inspector. Despite en

Symfony2 Form Validator - Comparing old and new values before flush

Symfony2 Form Validator - Comparing old and new values before flush

I was wondering if there is a way to compare old and new values in a validator within an entity prior to a flush.I have a Server entity which renders to a form fine. The entity has a relationship to status (N->1) which, when the status is c