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How do I resolve ClassNotFoundException?
... question is always what/where is the definition and which version did you mean?
– masterxilo
Nov 23 '18 at 22:44
2
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How do I print out the contents of an object in Rails for easy debugging?
...rails -s
results (in browser)
- !ruby/object:Post
raw_attributes:
id: 2
title: My Second Post
body: Welcome! This is another example post
published_at: '2015-10-19 23:00:43.469520'
created_at: '2015-10-20 00:00:43.470739'
updated_at: '2015-10-20 00:00:43.470739'
attri...
MySQL SELECT only not null values
...comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
SELECT *
FROM table
WHERE YourColumn IS NOT NULL;
Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not standard SQL.
SELECT *
FROM ...
Timing a command's execution in PowerShell
...t.stopwatch, or measure-command, or just comparing two get-date vars... (I mean what's more efficient to keep permanently in a script?)
– Hicsy
Sep 20 '17 at 4:00
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Add custom messages in assert?
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@Jichao, what do you mean by implementing the assert interface?
– Tarc
Aug 22 '16 at 21:57
add a comment
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Understanding events and event handlers in C#
...ns, see below) reference multiple methods (called MulticastDelegate). This means that when you call the delegate, multiple explicitly-attached methods will be executed. An object reference can always only reference to one object.
The restrictions for a MulticastDelegate are that the (method/delegate...
What is an Endpoint?
...rder to obtain an unauthorized Request Token from the server / service provider.
Resource Owner Authorization URI (called the User Authorization URL in the OAuth 1.0a community spec). This is a URI that you direct the user to to authorize a Request Token obtained from the Temporary Credential Reque...
count (non-blank) lines-of-code in bash
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Just habit. I read pipelines from left to right, which means I usually start with cat, then action, action, action, etc. Clearly, the end result is the same.
– Michael Cramer
Sep 24 '08 at 14:06
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How do I schedule jobs in Jenkins?
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*/5 * * * * means every 5 minutes
5 * * * * means the 5th minute of every hour
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Resize fields in Django Admin
... is a real waste of space, when, i.e., editing a date field, 8 characters wide, or a CharField, also 6 or 8 chars wide, and then the edit box goes up to 15 or 20 chars.
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