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Oracle SQL: Update a table with data from another table
...ere is no matching row in t2. Without it, every row in t1 will be updated and the values will be set to NULL if there is no matching row in t2. That is generally not what you want to happen so the WHERE EXISTS is generally needed.
– Justin Cave
Aug 5 '13 at 1...
Cleanest way to write retry logic?
...imply retry the same call can be dangerous if used as a general exception handling mechanism. Having said that, here's a lambda-based retry wrapper that you can use with any method. I chose to factor the number of retries and the retry timeout out as parameters for a bit more flexibility:
public st...
How do I enable EF migrations for multiple contexts to separate databases?
...ecause the Configuration.cs file already exists. If you rename that class and file, you should be able to run that 2nd Enable-Migrations, which will create another Configuration.cs.
You will then need to specify which configuration you want to use when updating the databases.
Update-Database -Con...
What's the @ in front of a string in C#?
...string verbatim = @"foo\bar";
string regular = "foo\\bar";
Here verbatim and regular have the same contents.
It also allows multi-line contents - which can be very handy for SQL:
string select = @"
SELECT Foo
FROM Bar
WHERE Name='Baz'";
The one bit of escaping which is necessary for verbatim s...
FontAwesome icons not showing. Why?
Recently I've been developing this website and I'm trying to put a font awesome icons in it, so it's scalable.
24 Answers
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href overrides ng-click in Angular.js
When both, href and ng-click attributes are defined:
16 Answers
16
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Activity has leaked window that was originally added
What is this error, and why does it happen?
40 Answers
40
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RegEx to extract all matches from string using RegExp.exec
...s an array.
For example:
const str = 'All of us except @Emran, @Raju and @Noman was there';
console.log(
str.match(/@\w*/g)
);
// Will log ["@Emran", "@Raju", "@Noman"]
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What's the difference between SCSS and Sass?
...een reading, Sass is a language that makes CSS more powerful with variable and math support.
13 Answers
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Can you test google analytics on a localhost address?
..., however the technology has changed. The old Urchin tracker is deprecated and obsolete. The new asynchronous Google Analytics tracking code uses slightly different code to achieve the same results.
Google Analytics Classic - Asynchronous Syntax - ga.js
The current syntax for setting the tracking do...