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What's the best way of structuring data on firebase?
...data and a SQL environment is querying data. There's no simple way to say "SELECT USERS WHERE X = Y", because of the real-time nature of the data (it's constantly changing, sharding, reconciling, etc, which requires a simpler internal model to keep the synchronized clients in check)
A simple exampl...
How to get a pixel's x,y coordinate color from an image?
Is there any way to check if a selected(x,y) point of a PNG image is transparent?
4 Answers
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Multiple inputs with same name through POST in php
...ted it up. You didn't explain much about it though, which is why I didn't select it as the answer to my question. This helps me a ton, as I've been trying to figure this one out for a while (as you may notice in one of my previous questions). My previous approach was to simply add all of the inpu...
What is a PDB file?
...want it to not be generated at all, go to your project's Build properties, select the Release configuration, click on "Advanced..." and under "Debug Info" pick "None".
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...ything, I asked my backend (MSSQL) to do this job instead of PHP!
$qry = "select DATEADD(month, 1, :date) next_date ";
$rs_tmp = $pdo->prepare($qry);
$rs_tmp->bindValue(":date", '2038/01/15');
$rs_tmp->execute();
$row_tmp = $rs_tmp->fetch(PDO::FETCH_ASSOC);
echo $row_tmp['next_date'];
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Unit Test? Integration Test? Regression Test? Acceptance Test?
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@Honey Well, the regression test suite is mostly a selection of some or all of your unit and integration tests. It's a policy thing, how much regression testing you want to do. The main difference is that Unit tests are done in active development while regression tests is mor...
Why doesn't Dijkstra's algorithm work for negative weight edges?
... the "closed" nodes is indeed minimal, and thus the node that will next be selected is also minimal.
The idea of it is: If we have a vertex in open such that its cost is minimal - by adding any positive number to any vertex - the minimality will never change.
Without the constraint on positive numb...
how to provide a swap function for my class?
...declared in the same namespace as the type for which they are provided get selected through argument-dependent lookup over this generic version.
But note that directly using the std::swap function for a user-defined class calls the generic version of std::swap instead of the user-defined swap:
my...
Why is Hibernate Open Session in View considered a bad practice?
...e offers @BatchSize for fetching associations in batches, and FetchMode.SUBSELECT to cope with this scenario, the annotations are affecting the default fetch plan, so they get applied to every business use case. For this reason, a data access layer query is much more suitable because it can be tailo...
What makes Lisp macros so special?
...could write a macro that lets you say something like:
(setvar *rows* (sql select count(*)
from some-table
where column1 = "Yes"
and column2 like "some%string%")
And thats not even getting into Reader macros.
Hope this helps.
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