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What is the most ridiculous pessimization you've seen? [closed]
...as well as being buggy, unmaintainable, etc. What is the most ridiculous example of this that you've seen?
42 Answers
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How do you find the row count for all your tables in Postgres
...nt, each with their own tradeoffs.
If you want a true count, you have to execute the SELECT statement like the one you used against each table. This is because PostgreSQL keeps row visibility information in the row itself, not anywhere else, so any accurate count can only be relative to some trans...
WPF ToolBar: how to remove grip and overflow
... ToggleButton, you will have to remove it in a custom ControlTemplate as sixlettervariables suggests, which if you have blend or can download the Blend 3 Preview is not overly difficult.
You could also just hide the button in the loaded event of the ToolBar, though whichever route you take, you sh...
What's is the difference between include and extend in use case diagram?
What is the difference between include and extend in a use case diagram ?
19 Answers
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Indent starting from the second line of a paragraph with CSS
...ld be appropriate.
div {
padding-left: 1.5em;
text-indent:-1.5em;
}
span {
padding-left: 1.5em;
text-indent:-1.5em;
}
<div>Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut lao...
What is the purpose of python's inner classes?
...
@Inversus: I disagree. This is not an answer, it is an extended quotation from someone else's answer about a different language (namely Java). Downvoted and I hope others do the same.
– Kevin
Feb 12 '16 at 4:20
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Good MapReduce examples [closed]
I couldn't think of any good examples other than the "how to count words in a long text with MapReduce" task. I found this wasn't the best example to give others an impression of how powerful this tool can be.
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“PKIX path building failed” and “unable to find valid certification path to requested target”
...rst run I got an error about certificate sun.security.validator.ValidatorException and sun.security.provider.certpath.SunCertPathBuilderException . Then I added twitter certificate by:
...
How to copy an object in Objective-C
.... You call copyWithZone on all your fields, to make a deep copy. A simple example is
@interface YourClass : NSObject <NSCopying>
{
SomeOtherObject *obj;
}
// In the implementation
-(id)copyWithZone:(NSZone *)zone
{
// We'll ignore the zone for now
YourClass *another = [[YourClass all...
Shall we always use [unowned self] inside closure in Swift
... to make sure that it is still around by the time the closure is called.
Example: Making an asynchronous network request
If you are making an asynchronous network request you do want the closure to retain self for when the request finishes. That object may have otherwise been deallocated but you s...