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MongoDB: How to query for records where field is null or not set?
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Upvoted because when using find with plain null it interprets values like 0.0 as null and this solution avoids this
– Matthias Herrmann
Apr 27 '18 at 9:14
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Where does this come from: -*- coding: utf-8 -*-
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From what I can conclude from Emacs manual, value can be any LISP expression, particularly, a double-quoted string
– hamstergene
Feb 2 '11 at 10:19
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Create array of symbols
...ays forget that it stands for "intern" an alternative to "to_sym". See codecademy.com/forum_questions/512a675cf116c52d0d00674b
– A5308Y
Jan 10 '14 at 15:44
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What does -XX:MaxPermSize do?
Specifically, why would it help to fix a PermGen OutOfMemoryError issue?
3 Answers
3
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Get TransactionScope to work with async / await
...om 4.5 to 4.5.1 by right clicking on project go to properties. Select application tab change target framework to 4.5.1 and use transaction as follow.
using (AccountServiceClient client = new AccountServiceClient())
using (TransactionScope scope = new TransactionScope(TransactionScopeAsyncFlowOption...
How does OpenID authentication work?
I am a little curious to know about how OpenID authentication works.
4 Answers
4
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How add “or” in switch statements?
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By stacking each switch case, you achieve the OR condition.
switch(myvar)
{
case 2:
case 5:
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break;
case 7:
case 12:
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break;
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}
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How can I do SELECT UNIQUE with LINQ?
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Thanks, this is the correct answer. Can someone please explain what goes in the .OrderBy() parameters. You have name=>name. Is that name coming from the column name in the DB? Because we have dbo.Color.Name then just name=>name which hints to me it is not...
What is a “Bitmap heap scan” in a query plan?
I want to know the principle of "Bitmap heap scan", I know this often happens
when I execute a query with OR in the condition.
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Why does [5,6,8,7][1,2] = 8 in JavaScript?
I can't wrap my mind around this quirk.
3 Answers
3
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