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In SQL, how can you “group by” in ranges?
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In postgres (where || is the string concatenation operator):
select (score/10)*10 || '-' || (score/10)*10+9 as scorerange, count(*)
from scores
group by score/10
order by 1
gives:
scorerange | count
------------+-------
0-9 | 11
10-19 ...
The property 'value' does not exist on value of type 'HTMLElement'
...t = document.getElementById('greet') as HTMLInputElement
const inputValue: string = inputElement.value
Documentation from Typescriptlang:
TypeScript - Basic Types - Type assertions
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impro...
Full Screen Theme for AppCompat
... android:name=".ui.FullImageActivity"
android:label="@string/title_activity_main"
android:screenOrientation="landscape"
android:theme="@style/DialogTheme">
</activity>
Style.xml
<style name="DialogTheme" parent="android:Theme.Dialog...
Is there a way that I can check if a data attribute exists?
...{
...
}
NOTE this only returns true if the data attribute is not empty string or a "falsey" value e.g. 0 or false.
If you want to check for the existence of the data attribute, even if empty, do this:
if (typeof $("#dataTable").data('timer') !== 'undefined') {
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}
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Calculate date/time difference in java [duplicate]
...this for a friendly representation of time differences (in milliseconds):
String friendlyTimeDiff(long timeDifferenceMilliseconds) {
long diffSeconds = timeDifferenceMilliseconds / 1000;
long diffMinutes = timeDifferenceMilliseconds / (60 * 1000);
long diffHours = timeDifferenceMillisec...
Sort objects in ArrayList by date?
...ble type (one that implements Comparable interface) (like Date, Integer or String) you can omit the comparator and the natural ordering will be used.
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Format numbers in django templates
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The string format (the python) way because you cannot use this directly in templates - you would have to put this in a template tag (which is a fine answer), but just throwing this out is of little use as a complete answer.
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Composer install error - requires ext_curl when it's actually enabled
...ample:
> sudo apt-get install php-curl
> sudo apt-get install php-mbstring
for every missing extension. Then:
> sudo apt-get update
and finally (in the project's root folder):
> composer install
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Running a command in a Grunt Task
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Note: cmd param should be a string not an array.
– RKI
Oct 27 '15 at 14:19
1
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How to make gradient background in android
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//Color.parseColor() method allow us to convert
// a hexadecimal color string to an integer value (int color)
int[] colors = {Color.parseColor("#008000"),Color.parseColor("#ADFF2F")};
//create a new gradient color
GradientDrawable gd = new GradientDrawable(
GradientDrawable.Orientation.TOP_BOTT...