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MongoDB, remove object from array
...
try..
db.mycollection.update(
{'_id': ObjectId("5150a1199fac0e6910000002")},
{ $pull: { "items" : { id: 23 } } },
false,
true
);
share
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improve thi...
How to make good reproducible pandas examples
...4, 6]], columns=['A', 'B'])
or make it "copy and pasteable" using pd.read_clipboard(sep='\s\s+'), you can format the text for Stack Overflow highlight and use Ctrl+K (or prepend four spaces to each line), or place three tildes above and below your code with your code unindented:
In [2]: df
Out[2]...
What is the most robust way to force a UIView to redraw?
...r setNeedsDisplay];
[layer displayIfNeeded];
}
Also implement a draw(_: CALayer, in: CGContext) method that'll call your private/internal drawing method (which works since every UIView is a CALayerDelegate):
Swift
/// Called by our CALayer when it wants us to draw
/// (in compliance wit...
Position of least significant bit that is set
... 7, 26, 12, 18, 6, 11, 5, 10, 9
};
r = MultiplyDeBruijnBitPosition[((uint32_t)((v & -v) * 0x077CB531U)) >> 27];
Helpful references:
"Using de Bruijn Sequences to Index a 1 in a Computer Word" - Explanation about why the above code works.
"Board Representation > Bitboards > BitSca...
Extending an Object in Javascript
...new instantiation (read why you shouldn't use new), no super, no self-made __construct. You simply create Objects and then extend or morph them.
This pattern also offers immutability (partial or full), and getters/setters.
TypeScript
The TypeScript equivalent looks the same:
interface Person {
...
get dictionary value by key
...
It's as simple as this:
String xmlfile = Data_Array["XML_File"];
Note that if the dictionary doesn't have a key that equals "XML_File", that code will throw an exception. If you want to check first, you can use TryGetValue like this:
string xmlfile;
if (!Data_Array.T...
How to return result of a SELECT inside a function in PostgreSQL?
...
Use RETURN QUERY:
CREATE OR REPLACE FUNCTION word_frequency(_max_tokens int)
RETURNS TABLE (txt text -- also visible as OUT parameter inside function
, cnt bigint
, ratio bigint) AS
$func$
BEGIN
RETURN QUERY
SELECT t.txt
,...
Where is SQL Server Management Studio 2012?
... work, so I did the following and it did: 1. Found the SQLManagementStudio_x86_ENU.exe for 2008 and ran it via the command prompt like so: SQLManagementStudio_x86_ENU.exe /action=uninstall /features=Tools 2. Did the same thing to uninstall 2012 3. Restarted my computer 3. Reinstalled SSMS 2012 u...
How to change the font on the TextView?
...thing like:
public class CustomFontsLoader {
public static final int FONT_NAME_1 = 0;
public static final int FONT_NAME_2 = 1;
public static final int FONT_NAME_3 = 2;
private static final int NUM_OF_CUSTOM_FONTS = 3;
private static boolean fontsLoaded = false;
private static Typeface[] f...
How to test code dependent on environment variables using JUnit?
...erviceImpl {
public void doSomeFooStuff() {
System.getenv("FOO_VAR_1");
System.getenv("FOO_VAR_2");
System.getenv("FOO_VAR_3");
// Do the other Foo stuff
}
}
You could do the following:
package com.foo.service.impl;
import static org.mockito.Mockito.when...