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C# Lazy Loaded Automatic Properties
... 4.0 Lazy<T> type to create this pattern
private Lazy<string> _someVariable =new Lazy<string>(SomeClass.IOnlyWantToCallYouOnce);
public string SomeVariable => _someVariable.Value;
This code will lazily calculate the value of _someVariable the first time the Value expression i...
Where is Erlang used and why? [closed]
...ng in its SMS and authentication systems.
• Motorola is using Erlang in call processing products in the public-safety industry.
• Ericsson uses Erlang in its support nodes, used in GPRS and 3G mobile networks
worldwide.
The most popular open source Erlang applications include the following:
•...
Assign pandas dataframe column dtypes
...s_spent]],columns = data_columns)
data_df = data_df.append(df_temp, ignore_index=True)
In [11]: data_df.dtypes
Out[11]:
wheel_number float64
car_name object
minutes_spent float64
dtype: object
data_df = data_df.astype(dtype= {"wheel_number":"int64",
"car_name":"object","mi...
Get the _id of inserted document in Mongo database in NodeJS
...ection.insert that will return the doc or docs inserted, which should have _ids.
Try:
collection.insert(objectToInsert, function(err,docsInserted){
console.log(docsInserted);
});
and check the console to see what I mean.
...
How to intercept touches events on a MKMapView or UIWebView objects?
...lot of hackish programming that imperfectly duplicates Apple's code, especially in the case of multitouch.
Here's what I do: Implement a gesture recognizer that cannot be prevented and that cannot prevent other gesture recognizers. Add it to the map view, and then use the gestureRecognizer's touc...
What is the point of function pointers?
...nction pointers. I guess it may be useful in some cases (they exist, after all), but I can't think of a case where it's better or unavoidable to use a function pointer.
...
what is .netrwhist?
...riting files across networks. .netrwhist is a history file which maintains all the directories that were modified. So whenever you modify the contents of ~/.vim it adds one entry in .netrwhist
A sample .netrwhist is as shown
let g:netrw_dirhistmax =10
let g:netrw_dirhist_cnt =6
let g:netrw_dirhis...
How to skip to next iteration in jQuery.each() util?
...ou can simply use an empty return statement:
$.each(collection, function (index, item) {
if (!someTestCondition)
return; // go to next iteration
// otherwise do something
});
It's possible this might vary by version; this is applicable for jquery 1.12.4. But really, when you exit out...
MySQL: What's the difference between float and double?
...00002 | 1.6900000000 |
This is using MySQL 6.7
Query:
SELECT
float_1 + float_2 as 'float add',
double_1 + double_2 as 'double add',
decimal_1 + decimal_2 as 'decimal add',
float_1 * float_2 as 'float multiply',
double_1 * double_2 as 'double multiply',
decimal_1 * decim...
How can I ignore a property when serializing using the DataContractSerializer?
...ty you don't want to serialize. See Paul's answer or checkoutall.com/Blog/Index/201410240204236271/…
– Doug
Nov 3 '15 at 17:48
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