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ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
... table. Following query would be helpful to fetch those non-matching rows:
SELECT child_table.*
FROM child_table
LEFT JOIN parent_table
ON parent_table.referenced_column = child_table.referencing_column
WHERE parent_table.referenced_column IS NULL
Now, you can generally do one (or more) of th...
Git Remote: Error: fatal: protocol error: bad line length character: Unab
...o 2.19.0
Solution:
Tools > Settings > Git Extensions > SSH
Select [OpenSSH] instead of [PuTTY]
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Rails: How to change the title of a page?
...In rails 3 content_for is smart enough to work correctly with caching (see selected answer).
– opsb
Nov 15 '11 at 10:41
4
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There is no ViewData item of type 'IEnumerable' that has the key 'xxx'
...ome other posts about this problem and it is:
If your ViewData contains a SelectList with the same name as your DropDownList i.e. "submarket_0", the Html helper will automatically populate your DropDownList with that data if you don't specify the 2nd parameter which in this case is the source Selec...
pull out p-values and r-squared from a linear regression
... need. The beta, se, t and p vectors are stored in it. Get the p-values by selecting the 4th column of the coefficients matrix (stored in the summary object):
summary(fit)$coefficients[,4]
summary(fit)$r.squared
Try str(summary(fit)) to see all the info that this object contains.
Edit: I had ...
Animated loading image in picasso
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Use romannurik.github.io/AndroidAssetStudio/index.html (select "Launcher icon generator") to create mdpi, hdpi, xhdpi, etc.
– CoolMind
Jan 10 '18 at 8:40
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Get name of property as a string
...
Okay, here's what I ended up creating (based upon the answer I selected and the question he referenced):
// <summary>
// Get the name of a static or instance property from a property access lambda.
// </summary>
// <typeparam name="T">Type of the property</typeparam...
How to check if an activity is the last one in the activity stack for an application?
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H9kDroid has made a correct suggestion. The selected answer is a hack. One should do it the right way using the isTaskRoot() method.
– Sufian
Apr 2 '14 at 6:17
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Removing the title text of an iOS UIBarButtonItem
...all needed here
}
Alternate method (IB only, no code)
On the storyboard select the navigation item for the first view controller (not the second). Just enter a space for the Back Button text.
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Options, Settings, Properties, Configuration, Preferences — when and why?
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Settings: Thinking of a slider to select a value from 1 to 10 for example
Options: Thinking of an on/off button
Preferences: Thinking of a choice from multiple choices, like morning, afternoon or evening
Configuration: Technical settings probably end users...