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Accessing nested JavaScript objects and arays by string path
...ect.byString = function(o, s) {
s = s.replace(/\[(\w+)\]/g, '.$1'); // convert indexes to properties
s = s.replace(/^\./, ''); // strip a leading dot
var a = s.split('.');
for (var i = 0, n = a.length; i < n; ++i) {
var k = a[i];
if (k in o) {
...
entity object cannot be referenced by multiple instances of IEntityChangeTracker. while adding relat
...ity1;
using (CityService cs = new CityService())
{
city1 = cs.SelectCity(Convert.ToInt64(cmbCity.SelectedItem.Value));
}
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How do I safely pass objects, especially STL objects, to and from a DLL?
...types (the bool specialization has a little bit of extra logic, since it's converted to a int8_t and then the int8_t is compared to 0 to convert back to bool, but this is fairly trivial).
We can also wrap STL types in this way, although it requires a little extra work:
#pragma pack(push, 1)
templa...
Tab Vs Space preferences in Vim
...set shiftwidth=4 "tabs are 4 spaces wide (default = 8)
set expandtab "Convert tabs to spaces
This is how my .vimrc is setup.
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Elegant way to invert a map in Scala
...Int,String] = Map(1 -> d, 2 -> b, 3 -> c)
To avoid this you can convert your map to a list of tuples first, then invert, so that you don't drop any duplicate values:
scala> val i = m.toList.map({ case(k , v) => v -> k})
i: List[(Int, String)] = List((1,a), (2,b), (3,c), (1,d))
...
Why is there no tuple comprehension in Python?
... into a smaller one by iterating over the attrs that you are interested in converting to a tuple record.
– dave
Jul 1 '16 at 13:37
2
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Checking if a key exists in a JavaScript object?
... if a property is present in a javascript object:
!!obj.theProperty
Will convert value to bool. returns true for all but the false value
'theProperty' in obj
Will return true if the property exists, no matter its value (even empty)
obj.hasOwnProperty('theProperty')
Does not check the prototype cha...
What is the use of hashCode in Java?
... distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java programming language.)
...
Compare dates in MySQL
...
That is SQL Server syntax for converting a date to a string. In MySQL you can use the DATE function to extract the date from a datetime:
SELECT *
FROM players
WHERE DATE(us_reg_date) BETWEEN '2000-07-05' AND '2011-11-10'
But if you want to take advanta...
jQuery posting JSON
...ype : 'POST',
...
if you pass an object as settings.data jQuery will convert it to query parameters and by default send with the data type application/x-www-form-urlencoded; charset=UTF-8, probably not what you want
sh...