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How to create a hash or dictionary object in JavaScript [duplicate]
...y Objects. That syntax implicitly casts the subscript value to a primitive string or symbol. Maps support any values as keys, so you must use the methods .get(key), .set(key, value) and .has(key).
var m = new Map();
var key1 = 'key1';
var key2 = {};
var key3 = {};
m.set(key1, 'value1');
...
Selecting a row of pandas series/dataframe by integer index
...operator, [] is to select columns.
When the indexing operator is passed a string or integer, it attempts to find a column with that particular name and return it as a Series.
So, in the question above: df[2] searches for a column name matching the integer value 2. This column does not exist and a ...
How do I load a PHP file into a variable?
...ile without running it through the webserver, the following should work.
$string = eval(file_get_contents("file.php"));
This will load then evaluate the file contents. The PHP file will need to be fully formed with <?php and ?> tags for eval to evaluate it.
...
JSON.Net Self referencing loop detected
... var q = (from a in db.Events where a.Active select a).ToList(); like
string jsonStr = Newtonsoft.Json.JsonConvert.SerializeObject(q, jsonSerializerSettings);
See:
https://www.newtonsoft.com/json/help/html/PreserveObjectReferences.htm
...
How to get the current date and time
...me fields and the DateFormat class should be used to format and parse date strings.
– Paolo M
Aug 7 '13 at 14:06
9
...
Dynamic array in C#
... use the ToArray() method after initiating your List dynamically
List<string> list = new List<string>();
list.Add("one");
list.Add("two");
list.Add("three");
string[] array = list.ToArray();
Of course, this has sense only if the size of the array is never known nor fixed ex-ante.
if...
Can I incorporate both SignalR and a RESTful API?
...Controller : HubController<ToDoListHub>
{
private static List<string> _items = new List<string>();
public IEnumerable<string> Get()
{
return _items;
}
public void Post([FromBody]string item)
{
_items.Add(item);
// Call add on ...
How to compare variables to undefined, if I don’t know whether they exist? [duplicate]
...a valid variable, do something here.
}
Note that typeof always returns a string, and doesn't generate an error if the variable doesn't exist at all.
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...
Prevent screen rotation on Android
...).getConfiguration().orientation;
@Override
protected void onPostExecute(String things) {
context.setRequestedOrientation(PlayListFragment.screenOrientation);
or
context.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
}
The only drawback here is that it require...
Using Intent in an Android application to show another activity
...="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".FirstActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
...