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Clicking the back button twice to exit an activity
I've noticed this pattern in a lot of Android apps and games recently: when clicking the back button to "exit" the application, a Toast comes up with a message similar to "Please click BACK again to exit".
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How to escape single quotes within single quoted strings
...on, using single quotes.
If you do not place any whitespaces between (1) and (2), or between (4) and (5), the shell will interpret that string as a one long word.
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Mechanisms for tracking DB schema changes [closed]
What are the best methods for tracking and/or automating DB schema changes? Our team uses Subversion for version control and we've been able to automate some of our tasks this way (pushing builds up to a staging server, deploying tested code to a production server) but we're still doing database up...
Strengths of Shell Scripting compared to Python [closed]
...scripting few times but was driven away by the syntax. Then I found Python and was able to do most of the things a shell script can do in Python. I am now not sure whether I should invest my time in learning shell scripting anymore. So I want to ask:
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How do I pronounce “=>” as used in lambda expressions in .Net
... fact, I asked this very question on the official linq pre-release forums, and Anders Hejlsberg responded by saying
I usually read the => operator as "becomes" or "for which". For example,
Func f = x => x * 2;
Func test = c => c.City == "London";
reads as "x becomes x * 2" and "c ...
Saving timestamp in mysql table using php
...t on an INT field. Anyway, a timestamp is only a representation of a date, and vice versa. You can convert from timestamp to date with the function jimy told you, and the other way with strtotime. edit: btw, timestamp only covers a range of all possible dates (1970-01-01 to xx-xx-2032 I think)
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How do you tell if caps lock is on using JavaScript?
...s/edit?js,output
Also, here is a modified version (can someone test on mac and confirm)
NEW VERSION: https://jsbin.com/xiconuv/edit?js,output
NEW VERSION:
function isCapslock(e) {
const IS_MAC = /Mac/.test(navigator.platform);
const charCode = e.charCode;
const shiftKey = e.shiftKey;
if (...
Where and how is the _ViewStart.cshtml layout file linked?
... that we use depending on what type of device is accessing the site –
and have a phone or tablet optimized layout for those devices, and a
desktop optimized layout for PCs/Laptops. Or if we were building a
CMS system or common shared app that is used across multiple customers
we could se...
How do I declare a namespace in JavaScript?
How do I create a namespace in JavaScript so that my objects and functions aren't overwritten by other same-named objects and functions? I've used the following:
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must appear in the GROUP BY clause or be used in an aggregate function
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To workaround this issue, you must calculate the aggregate in a sub-query and then join it with itself to get the additional columns you'd need to show:
SELECT m.cname, m.wmname, t.mx
FROM (
SELECT cname, MAX(avg) AS mx
FROM makerar
GROUP BY cname
) t JOIN makerar m ON m.cname = t....