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In STL maps, is it better to use map::insert than []?
...over readability but speed.
Here is a sample code through which I came to know about the point i mentioned.
class Sample
{
static int _noOfObjects;
int _objectNo;
public:
Sample() :
_objectNo( _noOfObjects++ )
{
std::cout<<"Inside default constructor of object...
Django: Get an object form the DB, or 'None' if nothing matches
... = models.CharField(max_length=255)
objects = GetOrNoneManager()
And now I can do this:
bob_or_none = Person.objects.get_or_none(name='Bob')
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How can I use Guzzle to send a POST request in JSON?
Does anybody know the correct way to post JSON using Guzzle ?
13 Answers
13
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How to execute XPath one-liners from shell?
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Note: xmlstarlet was rumored to be abandoned, but is now under active development again.
– clacke
Mar 25 '13 at 10:20
6
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How to update the value stored in Dictionary in C#?
... So this simple method seems also to be a better substitute for the well known ".Add" and ".TryGetValue" method without the necessity to change the value. (?) At least, if it doesn't matter to overwrite keys, for example in a situation where it is not excluded that keys are written more than once i...
JavaScript exponents
...milar manner with python and matlab:
a**b // will rise a to the power b
Now it is already implemented in Edge14, Chrome52, and also it is available with traceur or babel.
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What is pip's equivalent of `npm install package --save-dev`?
...dates.
Edit 2
Linked from the "better pip workflow" article above it is now recommended to use pipenv to manage requirements and virtual environments. Having used this a lot recently I would like to summarise how simple the transition is:
Install pipenv (on Mac)
brew install pipenv
pipenv cre...
How can I change the file type association of an existing file in WebStorm?
...think. I renamed it to have the .js extension which is what I wanted, but now it's stuck without any syntax highlighting. WebStorm doesn't treat it as a javascript file. I can't find anywhere to change how WebStorm treats this file. I've tried renaming it and renaming it back and that doesn't wo...
month name to month number and vice versa in python
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# To get month name
In [2]: datetime.datetime.strftime(datetime.datetime.now(), '%a %b %d, %Y')
Out [2]: 'Thu Aug 10, 2017'
# To get just the month name, %b gives abbrevated form, %B gives full month name
# %b => Jan
# %B => January
dateteime.datetime.strftime(datetime_object, '%b')
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How do I prevent an Android device from going to sleep programmatically?
... You should not use this anymore since this method is deprecated now. Take a look at one of the other answers.
– DuKes0mE
Jul 2 '13 at 23:59
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