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Adding 'serial' to existing column in Postgres
...INSERT INTO foo (a, b) SELECT i, 'foo ' || i::text FROM generate_series(1, 5) i;
INSERT INTO bar (b) SELECT 'bar ' || i::text FROM generate_series(1, 5) i;
-- blocks of commands to turn foo into bar
CREATE SEQUENCE foo_a_seq;
ALTER TABLE foo ALTER COLUMN a SET DEFAULT nextval('foo_a_seq');
ALTER TA...
How to create an array containing 1…N
....
If this is all you need, can you do this instead?
var foo = new Array(45); // create an empty array with length 45
then when you want to use it... (un-optimized, just for example)
for(var i = 0; i < foo.length; i++){
document.write('Item: ' + (i + 1) + ' of ' + foo.length + '<br/>'...
Linq order by boolean
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Jon SkeetJon Skeet
1211k772772 gold badges85588558 silver badges88218821 bronze badges
...
typedef fixed length array
...he years?
– supercat
Sep 14 '12 at 15:51
4
Probably worth mentioning the structure packing caveat...
add a string prefix to each value in a string column using Pandas
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5 Answers
5
Active
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PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)
...ect it.
– Paul Biggar
Nov 22 '11 at 5:58
2
This behavior is complex to understand and may lead to...
Deleting DataFrame row in Pandas based on column value
... I do it inplace?
– ziyuang
May 8 '15 at 13:21
11
Just ran it on a df with 2M rows and it went pr...
Find the extension of a filename in Ruby
...cepted_formats.include? File.extname("example.pdf")
=> true
irb(main):005:0> accepted_formats.include? File.extname("example.txt")
=> true
irb(main):006:0> accepted_formats.include? File.extname("example.png")
=> false
...
Canvas width and height in HTML5
Is it possible to fix the width and height of an HTML5 canvas element?
4 Answers
4
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HTML5: Slider with two inputs possible?
Is it possible to make a HTML5 slider with two input values, for example to select a price range? If so, how can it be done?
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