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Checking whether a variable is an integer or not [duplicate]
...ut the BUT part! isn't proper and clear data checking on method input(e.g. start, before beginning to do anyting with a variable) good practice in python as it should generally be in any programming? So, for example, before I give data to a database query when wanting to fetch an objetc by id, which...
SQL/mysql - Select distinct/UNIQUE but return all columns?
...e? Let us assume that you need a value with a certain characteristic, e.g. starting with the letter 'M'. Now things get complicated.
The only solution I could find so far is to put your whole query into a subquery, and to construct the additional column outside of it by hands:
SELECT
countryl...
Creating an empty file in Ruby: “touch” equivalent?
...o any variable? I'm creating the file so other processes on the system can start working with it immediately, and they will be blocked if the file handle is still open for writing.
– Abhi Beckert
Nov 11 '11 at 22:49
...
github markdown colspan
...t doesn't work on the live preview site you provide.
A simple test that I started with was:
| Header ||
|--------------|
| 0 | 1 |
using the command:
multimarkdown -t html test.md > test.html
share
|
...
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...
MySQL has started deprecating SQL_CALC_FOUND_ROWS functionality with version 8.0.17 onwards.
So, it is always preferred to consider executing your query with LIMIT, and then a second query with COUNT(*) and without LIMIT to determine ...
What is the difference between require_relative and require in Ruby?
...nly happens when "the filename does not resolve to an absolute path" (i.e. starts with / or ./ or ../), which is always the case for File.expand_path.
The following operation is possible with both, but you will want to use require as it is shorter and more efficient:
require '/a.rb' and require_...
Pattern to avoid nested try catch blocks?
...
This looks like a job for... MONADS! Specifically, the Maybe monad. Start with the Maybe monad as described here. Then add some extension methods. I wrote these extension methods specifically for the problem as you described it. The nice thing about monads is you can write the exact extension...
Bootstrap 3 Navbar Collapse
... 800px;
$screen-lg-min: 1200px;
// this tells which screen size to use to start breaking on
// will tell navbar when to collapse
$grid-float-breakpoint: $screen-md-min;
// then import your bootstrap
@import "bootstrap";
that's it! this variables reference page is super handy: https://github.com/...
How to check BLAS/LAPACK linkage in NumPy and SciPy?
...fig(), which is probably a public API function by virtue of the absence of starting underscores. But it's not documented online and has no docstring, so it's no surprise that it's so hard to find. Hopefully they'll fix that.
– Praveen
Feb 23 '17 at 5:17
...
window.onload vs document.onload
...ad.
Browser support issues are most likely the reason why many people are starting to use libraries such as jQuery to handle the checking for the document being ready, like so:
$(document).ready(function() { /* code here */ });
$(function() { /* code here */ });
For the purpose of history. win...