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Best way to test SQL queries [closed]
...onth as
select *, year * 12 + month as absolute_month from month_value;
Now what we have to test is inherent in our spec, namely that for any tuple (year, month), there is one and only one (absolute_month), and that (absolute_month)s are consecutive. Let's write some tests.
Our test will be a SQ...
Check if page gets reloaded or refreshed in JavaScript
...s deprecated, pls see Илья Зеленько's answer
A better way to know that the page is actually reloaded is to use the navigator object that is supported by most modern browsers.
It uses the Navigation Timing API.
//check for Navigation Timing API support
if (window.performance) {
con...
Convert dmesg timestamp to custom date format
...:
dmesg_with_human_timestamps () {
FORMAT="%a %b %d %H:%M:%S %Y"
now=$(date +%s)
cputime_line=$(grep -m1 "\.clock" /proc/sched_debug)
if [[ $cputime_line =~ [^0-9]*([0-9]*).* ]]; then
cputime=$((BASH_REMATCH[1] / 1000))
fi
dmesg | while IFS= read -r line; do
...
How should I store GUID in MySQL tables?
...tes with an Integer. Since he put that challenge out there to me I thought now was a good time to mention it. That being said...
You can store a guid as a CHAR(16) binary if you want to make the most optimal use of storage space.
...
Check image width and height before upload with Javascript
...ed in a few browsers. Mostly firefox and chrome, could be opera as well by now.
P.S. The URL.createObjectURL() method has been removed from the MediaStream interface. This method has been deprecated in 2013 and superseded by assigning streams to HTMLMediaElement.srcObject. The old method was remove...
Creating Unicode character from its number
... @DavidGiven thanks for Java chars go up to 0xFFFF. I did not know that.
– Tony Ennis
Aug 29 '13 at 12:21
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Cast Int to enum in Java
...lain why you regard MyEnum.values()[x] as an expensive operation. I don't know how it works in details, but to me it seems like accessing an element in an Array would be no big deal, aka constant time. If the array has to be build it takes O(n) time, which is the same runnning time as your solution....
IntelliJ Split Window Navigation
...the key mappings and have not found one that seems to accomplish this. I know I can use the mouse, but I'm trying to find ways to avoid the mouse and stay with the keyboard.
...
How do I extend a class with c# extension methods?
...
{
public static DateTime Tomorrow
{
get { return DateTime.Now.AddDays(1); }
}
}
Which you would use like this:
DateTime tomorrow = DateTimeHelper.Tomorrow;
share
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improve t...
List or IList [closed]
...ays writeable and thus always keeps its promises. Also, since .NET 4.6, we now have IReadOnlyCollection<T> and IReadOnlyList<T> which are almost always better fits than IList<T>. And they are covariant. Avoid IList<T>!
– ZunTzu
Nov 10 '1...