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Is it fine to have foreign key as primary key?
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Foreign keys are almost always "Allow Duplicates," which would make them unsuitable as Primary Keys.
Instead, find a field that uniquely identifies each record in the table, or add a new field (either an auto-incrementing integer or a GUID) to act as the p...
How can I return to a parent activity correctly?
...ent to it.
Therefore, the system is forced to recreate activity A (i.e. calling onCreate) even if the task stack is handled correctly.
To fix this problem you need to change the manifest, adding the following attribute to the A activity declaration:
android:launchMode="singleTop"
Note: calling...
How to view the assembly behind the code using Visual C++?
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There are several approaches:
You can normally see assembly code while debugging C++ in visual studio (and eclipse too). For this in Visual Studio put a breakpoint on code in question and when debugger hits it rigth click and find "Go To Assembly" ( or press CTRL+ALT...
String.replaceAll without RegEx
I'd like to replace all instances of a substring in a string but String.replaceAll() only accepts a pattern. The string that I have came from a previous match. Is it possible to add escapes to the pattern that I have or is there a version of replaceAll() in another class which accepts a literal ...
How to clone git repository with specific revision/changeset?
How can I clone git repository with specific revision, something like I usually do in Mercurial:
15 Answers
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Transpose a data frame
...You'd better not transpose the data.frame while the name column is in it - all numeric values will then be turned into strings!
Here's a solution that keeps numbers as numbers:
# first remember the names
n <- df.aree$name
# transpose all but the first column (name)
df.aree <- as.data.frame(...
Replacement for deprecated sizeWithFont: in iOS 7?
...ng existing data vs. you typing it multiple times or referencing constants all over the place, etc
– toblerpwn
Oct 30 '13 at 21:38
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Chrome ignores autocomplete=“off”
...eated a web application which uses a tagbox drop down. This works great in all browsers except Chrome browser (Version 21.0.1180.89).
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Bootstrap 3 Flush footer to bottom. not fixed
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For me this does not work because my footer is rather tall. It's great if you just want a paragraph but mine has several columns - using this method, I end up with a margin under the footer when I go down to smaller sizes
– NightMICU
Jul 15 ...
Restful API service
I'm looking to make a service which I can use to make calls to a web-based REST API.
11 Answers
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