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Adding an identity to an existing column
...ess than 5 seconds.
Here's a code sample of how it works.
CREATE TABLE Test
(
id int identity(1,1),
somecolumn varchar(10)
);
INSERT INTO Test VALUES ('Hello');
INSERT INTO Test VALUES ('World');
-- copy the table. use same schema, but no identity
CREATE TABLE Test2
(
id int NO...
Using curl to upload POST data with files
... -F "filecomment=This is an image file" \
-F "image=@/home/user1/Desktop/test.jpg" \
localhost/uploader.php
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Why is arr = [] faster than arr = new Array?
...
Just made a test case. new Array(n) is faster in cases where you know the size of the array ahead of time jsperf.com/square-braces-vs-new-array
– Y. Yoshii
Dec 10 '19 at 3:59
...
Unioning two tables with different number of columns
...rict in column orders. this example below produces an error:
create table test1_1790 (
col_a varchar2(30),
col_b number,
col_c date);
create table test2_1790 (
col_a varchar2(30),
col_c date,
col_b number);
select * from test1_1790
union all
select * from test2_1790;
ORA-01790: expression must ...
Why do we need entity objects? [closed]
... separating your domain model from your database model.
What I do is use Test Driven Development so I write my UI and Model layers first and the Data layer is mocked, so the UI and model is build around domain specific objects, then later I map these objects to what ever technology I'm using the t...
The most accurate way to check JS object's type?
...
That test on jsPerf isn't quite accurate. Those tests are not equal (testing for the same thing). E.g., typeof [] returns "object", typeof {} also returns "object", even though one is an object Array and the other is an object Ob...
How to use string.replace() in python 3.x
...e str.replace() as a chain of str.replace(). Think you have a string like 'Testing PRI/Sec (#434242332;PP:432:133423846,335)' and you want to replace all the '#',':',';','/' sign with '-'. You can replace it either this way(normal way),
>>> str = 'Testing PRI/Sec (#434242332;PP:432:1334238...
Stash only one file out of multiple files that have changed with Git?
...keep. For example: I change files A and B, then stash B, because I want to test the changes in A; I find a problem with A that I then fix; I commit A; Now I can't unstash because an old version of A is in the stash for no good reason causing a merge conflict. In practise A and B might be many files,...
Should I use multiplication or division?
...gh"--Note which user requirement/story requires that metric.
Write a speed test
Test existing code--If it's fast enough, you're done.
Recode it optimized
Test optimized code. IF it doesn't meet the metric, throw it away and keep the original.
If it meets the test, keep the original code in as comme...
How to allow only numeric (0-9) in HTML inputbox using jQuery?
...ion() {
$("#myTextBox").inputFilter(function(value) {
return /^\d*$/.test(value); // Allow digits only, using a RegExp
});
});
See the JSFiddle demo for more input filter examples. Also note that you still must do server side validation!
Pure JavaScript (without jQuery)
jQuery isn't a...