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cartesian product in pandas
...e cartesian product on.
My use case was that I needed a list of all store IDs on for each week in my list. So, I created a list of all the weeks I wanted to have, then a list of all the store IDs I wanted to map them against.
The merge I chose left, but would be semantically the same as inner in t...
Should MySQL have its timezone set to UTC?
...ion` tzt
INNER JOIN mysql.`time_zone_transition_type` tztt USING(Time_zone_id, Transition_type_id)
INNER JOIN mysql.`time_zone_name` tzn USING(Time_zone_id)
-- WHERE tzn.Name LIKE 'Europe/Moscow' -- Moscow has weird DST changes
ORDER BY tzt.Transition_time ASC
CONVERT_TZ also applies any necessary...
What does principal end of an association means in 1:1 relationship in Entity framework
...use:
public class Boo
{
[Key, ForeignKey("Foo")]
public string BooId{get;set;}
public Foo Foo{get;set;}
}
Or fluent mapping
modelBuilder.Entity<Foo>()
.HasOptional(f => f.Boo)
.WithRequired(s => s.Foo);
...
Strangest language feature
...
In JavaScript, the following construct
return
{
id : 1234,
title : 'Tony the Pony'
};
returns undefined is a syntax error due to the sneaky implicit semicolon insertion on the newline after return. The following works as you would expect though:
return {
id : 12...
How to count items in a Go map?
...C BY-SA 3.0 and may be found in the Documentation archive. Reference topic ID: 732 and example ID: 2528.
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Injecting $scope into an angular service function()
...ing with the server.
var save = function (student) {
if (student.id === null) {
students.push(student);
} else {
for (var i = 0; i < students.length; i++) {
if (students[i].id === student.id) {
students[i] = student;
break;
...
A numeric string as array key in PHP
...thought it would be fun to point out that the behaviour is similar but not identical to JavaScript object keys.
foo = { '10' : 'bar' };
foo['10']; // "bar"
foo[10]; // "bar"
foo[012]; // "bar"
foo['012']; // undefined!
sh...
How to reduce iOS AVPlayer start delay
...ets are local on the device -- no network streaming is taking place. The videos contain audio tracks.
6 Answers
...
How to disable Crashlytics during development
Is there any simple way to turn Crashlytics Android SDK off while developing ?
28 Answers
...
Disabled form inputs do not appear in the request
...ielson317 You can keep the select element "disabled" but also add another hidden input with the same value.
– AlphaMale
May 5 '15 at 3:34
1
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