How to make sure a class function wont be called until another class function has been called first?
Tag : python , By : Ian Badcoe
Date : March 29 2020, 07:55 AM
help you fix your problem I have a class object that creates some data fields: , I think the most pythonic way would be to throw an exception: def get_datalength(self):
try:
return self.data_length
except AttributeError:
raise AttributeError("No length call create_fields first")
@property
def datalength(self):
return do_some_stuff(self.data_length)
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How to make the calling function wait until the called function finishes execution in jquery?
Date : March 29 2020, 07:55 AM
Does that help About your second question: You don't get it att all what I've explain it to you, do you? done() subscription callbacks are called when you resolve your defferred instance dfd. It is called almost the very moment you resolve it. So you are going to open your next dialog when you have recieved the data. function dashboard_submit() {
alert('Dashboard submit');
var dfd = new $.Deferred();
dashboard_name = 'ram';
$("#d_name_modal_div").modal({
backdrop: false
});
dfd.done(function(){
var dn = $('#dashboard_name');
dn.val('booooooo I recived the data now I can open the dialog');
dn.text(dn.val());
$("#d_name_modal_div").modal("show");
});
dfd.resolve();
return dfd;
}
function wtf() {
var dfd = $.Deferred();
$('#d_name_modal_submit').on('click', function () {
dashboard_name = $('#dashboard_name').val();
alert(dashboard_name);
if ( !$.trim(dashboard_name) ) {
alert('Dashboard name is mandatory.');
return false;
} else {
dfd.resolve();
alert('success');
return dfd;
}
});
}
$('#add_to_dash').click(function (e) {
alert('Add to dash start');
dashboard_submit().done(function () {
wtf();
});
alert('Add to dash end');
});
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In C can a called function make the caller function return?
Date : March 29 2020, 07:55 AM
like below fixes the issue Such a thing is not possible in C, but you can get close. The identifier __func__ is implicitly declared at the beginning of each function as static const char __func__[];
void error_check_fun(const char *function, int code, int result);
#define error_check(code, result) error_check_fun(__func__, code, result);
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Will enclosing the caller function and the called function inside process.nextTick make them asynchronous?
Date : March 29 2020, 07:55 AM
around this issue No. If the startPolling() function is blocking, then putting it in nextTick() callback won't help. It will block the entire thread on the next tick of the event loop - but it will block it nonetheless. Example: function x() {
fs.readFileSync('file');
}
x(); // <-- it blocks here
console.log('...');
function x() {
pricess.nextTick(() => fs.readFileSync('file'));
}
x();
console.log('...');
// <-- it blocks here
// (end of file)
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How to make variable of calling function known to called function (not as function argument)
Tag : r , By : Robin Buitenhuis
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , You can wrap the additioanl parameters in a "constructor function" like so: getTestFun <- function(a) {
Test_Fun <- function(x) {
list(Score = exp(-a*(x - 2)^2) + exp(-(x - 6)^2/10) + 1/ (x^2 + 1),
Pred = 0)
}
Test_Fun
}
Do_Opt=function () {
a=2
Test_Fun <- getTestFun(a)
OPT_Res <- BayesianOptimization(Test_Fun,
bounds = list(x = c(1, 3)),
init_points = 2, n_iter = 1,
acq = "ucb", kappa = 2.576, eps = 0.0,
verbose = FALSE)
}
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