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Subtract two variables in Bash
...answe.r
– Amal Murali
Feb 15 '14 at 10:50
2
Thanks. Backtick is old shell syntax. BASH supports n...
Check if instance is of a type
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answered Aug 24 '10 at 21:47
Jon SkeetJon Skeet
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Fix code indentation in Xcode
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answered Aug 24 '10 at 16:36
VladimirVladimir
165k3535 gold badges377377 silver badges309309 bronze badges
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How can I indent multiple lines in Xcode?
...l.app.
– Gregory Cosmo Haun
Jun 15 '10 at 23:57
8
Some apps that also run on other OSs use TAB an...
Java String array: is there a size of method?
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Yes, .length (property-like, not a method):
String[] array = new String[10];
int size = array.length;
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What is the Sign Off feature in Git for?
...ingPatches).
– Chris Johnsen
Jul 6 '10 at 22:40
44
So why did this need to be done in the commit ...
Why does parseInt(1/0, 19) return 18?
...are the digits in base 19 along with their decimal values:
Base 19 Base 10 (decimal)
---------------------------
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
a...
How do I repeat an edit on multiple lines in Vim?
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110
:10,20s/^/,/
Or use a macro, record with:
q a i , ESC j h q
use with:
@ a
Explanation: q a...
How to update column with null value
...special syntax:
CREATE TABLE your_table (some_id int, your_column varchar(100));
INSERT INTO your_table VALUES (1, 'Hello');
UPDATE your_table
SET your_column = NULL
WHERE some_id = 1;
SELECT * FROM your_table WHERE your_column IS NULL;
+---------+-------------+
| some_id | your_column |
+--...