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How many and which are the uses of “const” in C++?
...ect remain the same. Once one of the object changes data, you however need now two versions: One for the original, and one for the copy. That is, you copy on a write to either object, so that they now both have their own version.
Using code:
int main() {
string const a = "1234";
string co...
Left Align Cells in UICollectionView
... the array. You may look into the source code for its implementation.)
So now the only thing we have to do is to implement the layoutAttributesForItem(at indexPath: IndexPath) function properly. The super class UICollectionViewFlowLayout already puts the correct number of cells in each line so we o...
this.setState isn't merging states as I would expect
...ability helpers were recently added to React.addons, so with that, you can now do something like:
var newState = React.addons.update(this.state, {
selected: {
name: { $set: 'Barfoo' }
}
});
this.setState(newState);
Immutability helpers documentation.
...
Static hosting on Amazon S3 - DNS Configuration
...onal version (http://www.example.com.s3-website-us-east-1.amazonaws.com/)
Now, we can set up the DNS to give you a clean, custom URL.
First, we will map www.example.com to your site.
Using your DNS provider's tools, (123-reg in your case) you need to create a CNAME record to map www.example.com t...
Clustered vs Non-Clustered
My lower level knowledge of SQL (Server 2008) is limited, and is now being challanged by our DBAs. Let me explain (I have mentioned obvious statements in the hope that I am right, but if you see something wrong, please tell me) the scenario:
...
Why dict.get(key) instead of dict[key]?
...ents anywhere?
As mentioned here,
It seems that all three approaches now exhibit similar performance (within about 10% of each other), more or less independent of the properties of the list of words.
Earlier get was considerably slower, However now the speed is almost comparable along with t...
Python constructors and __init__
...e one defined with same name in prior? :( my Q sounds silly.. should have known it
– 0xc0de
Jan 24 '12 at 11:38
4
...
What is the reason not to use select *?
...tle differently. Brittle is normally defined as 'breaks easily'. Having unknown or hard-to-find dependencies because each piece of code will use different columns means I can't easily change anything at the data level without full regression .. which seems brittle.
– Robert Pau...
Markdown and image alignment
...)
Note the added URL hash #center.
Now add this rule in CSS using CSS 3 attribute selectors to select images with a certain path.
img[src*='#left'] {
float: left;
}
img[src*='#right'] {
float: right;
}
img[src*='#center'] {
display: block;
ma...
When saving, how can you check if a field has changed?
...mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def __init__(self, *args, **kwargs):
super(ModelDiffMixin, self).__init__(*args, **kwargs)
self.__initial = self._dict
@property
def diff(self):
...