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What is the best JavaScript code to create an img element
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var img = document.createElement('img');
img.src = 'my_image.jpg';
document.getElementById('container').appendChild(img);
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Get all related Django model objects
...igure this out so I could implement a kind of "Observer Pattern" on
one of my models. Hope it's helpful.
Django 1.8+
Use _meta.get_fields(): https://docs.djangoproject.com/en/1.10/ref/models/meta/#django.db.models.options.Options.get_fields (see reverse in the _get_fields() source also)
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When to use std::begin and std::end instead of container specific versions [duplicate]
..... so there is that to consider. If you are not using arrays, I'd go with my suggestion. However if you are unsure if what is passed is going to be an STL container, or an array of <T>, then std::begin() is the way to go.
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Genymotion, “Unable to load VirtualBox engine.” on Mavericks. VBox is setup correctly
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Be cautioned. When I deleted the file, my machine immediately shutdown. Save your work! Started up fine, and I uninstalled both and reinstalled, and it started working again.
– Jahmic
Apr 9 '17 at 14:03
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How do I remove a single file from the staging area (undo git add)?
...e index. I make changes to several files, open Git and add these files to my staging area with "git add ."
17 Answers
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Can Android do peer-to-peer ad-hoc networking?
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my friend and I are currently developing a java library implementing the AODV protocol (multihop routing suitable for mobile networks), in our bachelor thesis. The final 'product' includes a easy way to create/join an adhoc n...
HTML list-style-type dash
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Let me add my version too, mostly for me to find my own preferred solution again:
ul {
list-style-type: none;
/*use padding to move list item from left to right*/
padding-left: 1em;
}
ul li:before {
content: "–";
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Ruby on Rails: how do I sort with two columns using ActiveRecord?
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Assuming you're using MySQL,
Model.all(:order => 'DATE(updated_at), price')
Note the distinction from the other answers. The updated_at column will be a full timestamp, so if you want to sort based on the day it was updated, you need to use ...
What exactly is Type Coercion in Javascript?
...se it can only be converted explicitly, but not implicitly.
String(Symbol('my symbol')) // 'Symbol(my symbol)'
'' + Symbol('my symbol') // TypeError is thrown
Boolean conversion
To explicitly convert a value to a boolean apply the Boolean() function.
Implicit conversion happens in logical co...
Nested Git repositories?
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You could add
/project_root/third_party_git_repository_used_by_my_project
to
/project_root/.gitignore
that should prevent the nested repo to be included in the parent repo, and you can work with them independently.
But: If a user runs git clean -dfx in the parent repo, it will r...