Angular Forms - why and when we are using markAsPristine() function? - angular4-forms

I need to get the better understanding of the use of markAsPristine() function.

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How to use the compute function in dart to pass more than one parameter?

I need to use isolate to compute a rather heavy calculation for the app im developing.
All i managed to find is how to pass a single to compute function
but i need to pass more than 1 param to the function, can anyone tell me the synthax
compute(function,param);

Is there an easier way to discover function parameters in MemSQL?

I need to enumerate all parameters in a MemSQL function. Is there an easier way other than using SHOW CREATE FUNCTION and then parsing the definition? For example, when using MySql, I could use
connection.GetSchema("Procedure Parameters",
new string[] { null, database, structureName });
Unfortunately there isn't really a better approach right now. The GetSchema method from your example makes use of a MySQL metadata table that is currently unsupported in MemSQL.

Matlab converting library to model

I'm working on a script to convert a Simulink library to a plain model, meaning it can be simulated, it does not auto-lock etc.
Is there a way to do this with code aside from basically copy-pasting every single block into a new model? And if it isn't, what is the most efficient way to do the "copy-paste".
I was not able to find any clues as how to approach this problem here, or on Google, or on the official documentation or on the MathWorks forum so I'm at a loss on how to proceed.
Thank you in advance!
I don't think it's possible to convert a library to a model, but you can programmatically add library blocks to models like so:
sys = 'testModel';
new_system(sys);
open_system(sys);
add_block('Simulink/Sources/Sine Wave', [sys, '/MySineWave']);
save_system(sys);
close_system(sys);
sim(sys);
You could even use the find_system command to list all the blocks in a library and then loop through them all and create a new model for each using the above code.

Create Custom Functions in MATLAB

I'm having problems with functions in matlab, I need to do an equalizer that uses 3 filter (high pass, low pass, band pass), I've created three diferent scripts to do this filters, now I want my main program of the equalizer call this 3 scripts, someone knows how to do this? I've serach in the internet but i don't found anything that can help me.
If I understand you correctly, you are wanting to pass the filters you have created in as functions to some script that will do the processing. This is fairly straightforward to do by passing in a function handle as an argument. If, for example, you have a function called high_pass_filter (written in a file high_pass_filter.m), then you can pass it in as an argument to a function using something like:
do_processing(#high_pass_filter, arguments);
In the function do_processing, it has as its definition something like
function do_processing(filter, arguments)
then to apply the filter (i.e. execute high_pass_filter.m), you just need to write
filter(arguments_for_filter_function);
Then you can call the same processing function for the three different filters.
More on function handles can be found on this page of the Matlab documentation

i18n in Symfony Forms

Is there any way I can use the format_number_choice function inside of a actions file. In fact I need to use it for a Form error message.
'max_size' => 'File is too large (maximum is %max_size% bytes).',
In English it's simply "bytes", but in other languages the syntax changes after a certain value (for example if the number is greater than 20 it's: "20 of bytes").
I can use parenthesis, of course, but if the framework offers support for doing this specific thing, why not to use it?!
The way it's currently implemented in the 1.4 branch, you can define only one translation per message using il18n XML files.
What you could do is create a custom validator which inherits the current validator (sfValidatorFile in your example) and does the size checking in the doClean method before calling its parent's method.
I suggest you take a look at the source to see how it works : sfValidatorFile
The correct way to handle number ranges for translation is explained here in the Definitive Guide. I won't reproduce it here as the documentation itself is clear and concise. Note however that the string is not extracted automatically by the i18n-extract task, so you need to add it manually - again, the documentation explains this.
So yes, you can use the format_number_choice() function inside an action - you just need to load the helper inside the action like this:
sfContext::getInstance()->getConfiguration()->loadHelpers('I18N');