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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
... work for a ForeignKey field, a few changes need to be made. Firstly, the SELECT HTML tag does not have the readonly attribute. We need to use disabled="disabled" instead. However, then the browser doesn't send any form data back for that field. So we need to set that field to not be required so...
Getting number of days in a month
...
I made it calculate days in month from datetimepicker selected month and year , and I but the code in datetimepicker1 textchanged to return the result in a textbox
with this code
private void DateTimePicker1_ValueChanged(object sender, EventArgs e)
{
int s = System.DateTime...
Django: multiple models in one template using forms [closed]
...belong to Tickets via a ForeignKey as well. I'd like to have the option of selecting a Customer (that's a whole separate project) OR creating a new Customer, then creating a Ticket and finally creating a Note assigned to the new ticket.
...
How can I search for a multiline pattern in a file?
.... Then use grep with perl regex by adding -P. find . -exec grep -nHP '(?s)SELECT.{1,60}FROM.{1,20}table_name' '{}' \;
– Jim
Feb 22 '13 at 13:02
...
Query EC2 tags from within instance
... Name=resource-id,Values=ec2metadata --instance-id --out=json|jq '.Tags[]| select(.Key == "role")|.Value'
– jolestar
Apr 25 '15 at 2:14
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jQuery event to trigger action when a div is made visible
...ns) {
alert('Attributes changed!');
});
var target = document.querySelector('#testdiv');
observer.observe(target, {
attributes: true
});
});
<div id="testdiv" style="display:none;">hidden</div>
<button id="show">Show hidden div</button>
<script type="tex...
Epoch vs Iteration when training neural networks
...ining instances into subsets (i.e., batches), performing one pass over the selected subset (i.e., batch), and then optimizing the network through backpropagation. The number o
How to access the ith column of a NumPy multidimensional array?
...]])
>>> ncol = test.shape[1]
>>> ncol
5L
Then you can select the 2nd - 4th column this way:
>>> test[0:, 1:(ncol - 1)]
array([[1, 2, 3],
[6, 7, 8]])
share
|
im...
How to set transform origin in SVG
... original code, which I got working in Chrome 65:
//...
this.layerGroups.selectAll('.dot')
.data(data)
.enter()
.append('circle')
.attr('transform-origin', (d,i)=> `${valueScale(d.value) * Math.sin( sliceSize * i)}
${valueScale(d.value) * Math.cos( ...
Setting the zoom level for a MKMapView
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This should be the selected answer. I tried a lot of the other proposed solutions but none of them worked properly. This code is simple and effective.
– Levi Roberts
May 8 '14 at 7:07
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