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What happens if you call erase() on a map element while iterating from begin to end?
...;
while(pm_it != port_map.end())
{
if (pm_it->second == delete_this_id)
{
pm_it = port_map.erase(pm_it);
}
else
{
++pm_it;
}
}
C++03
Erasing elements in a map does not invalidate any iterators.
(apart from iterators on the element that was deleted)
Actu...
delete_all vs destroy_all?
...ach to delete records from a table. For instance, I have a user whose user ID is across many tables. I want to delete this user and every record that has his ID in all tables.
...
Table header to stay fixed at the top when user scrolls it out of view with jQuery
...ixed position to show the header at the top of the page.
HTML:
<table id="header-fixed"></table>
CSS:
#header-fixed {
position: fixed;
top: 0px; display:none;
background-color:white;
}
JavaScript:
var tableOffset = $("#table-1").offset().top;
var $header = $("#table-1...
How to change the Text color of Menu item in Android?
Can I change the background color of a Menu item in Android?
27 Answers
27
...
How to create a drop shadow only on one side of an element?
...udo element is required.
#box {
background-color: #3D6AA2;
width: 160px;
height: 90px;
position: absolute;
top: calc(10% - 10px);
left: calc(50% - 80px);
}
.box-shadow:after {
content:"";
position:absolute;
width:100%;
bottom:1px;
z-ind...
How to create a readonly textbox in ASP.NET MVC3 Razor
...nders a normal text-box like this:
<input class="text-box single-line" id="field-id" name="field-name" />
And the second will render to;
<input readonly="readonly" disabled="disabled" class="text-box single-line readonly" id="field-id" name="field-name" />
You can use this solution...
What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
...
I use native query with Lazy fetch in both sides of relationship but still loads hierarchy of child relations.
– Badamchi
Dec 25 '19 at 12:18
...
Rails migration: t.references with alternative name?
...n with this:
add_foreign_key :courses, :courses, column: :transferrable_as_id
add_foreign_key :courses, :courses, column: :same_as_id
Update
In Rails 5.1 and above you can add the foreign key in the migration in the create_table block like this:
create_table :courses do |t|
t.string :name
t.ref...
How can I find out the current route in Rails?
... always available in params[:controller] and params[:action]. However, outside of it, if you want to recognize the route, this API is not available anymore. It has now shifted to ActionDispatch::Routing and I haven't tried out the recognize_path on it yet.
– Swanand
...
Android: How to create a Dialog without a title?
I'm trying to generate a custom dialog in Android.
I create my Dialog like this:
25 Answers
...