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How can I find out what FOREIGN KEY constraint references a table in SQL Server?
I am trying to drop a table but getting the following message:
15 Answers
15
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SQL - Update multiple records in one query
... config t2
ON t1.config_name = 'name1' AND t2.config_name = 'name2'
SET t1.config_value = 'value',
t2.config_value = 'value2';
Here is SQLFiddle demo
or conditional update
UPDATE config
SET config_value = CASE config_name
WHEN 'name1' THEN 'value'
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How to suppress “unused parameter” warnings in C?
... course this effects the whole file (and maybe project depending where you set the switch) but you don't have to change any code.
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How do I read / convert an InputStream into a String in Java?
...(Apache Utils)
String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
Using CharStreams (Guava)
String result = CharStreams.toString(new InputStreamReader(
inputStream, Charsets.UTF_8));
Using Scanner (JDK)
Scanner s = new Scanner(inputStream).useDelimiter("\\A");
Strin...
How to unstage large number of files without deleting the content
...
git reset
If all you want is to undo an overzealous "git add" run:
git reset
Your changes will be unstaged and ready for you to re-add as you please.
DO NOT RUN git reset --hard.
It will not only unstage your added files,...
NSUserDefaults removeObjectForKey vs. setObject:nil
...Swift 3.0
The below answer is no longer the case when I tested this.
When set to nil the result is NSCFData being stored. Possibly an NSNull object reference, but I am not positive.
To completely remove a value for a key use UserDefaults.standard.removeObject(forKey: "YourDefault")
I tested with...
R memory management / cannot allocate vector of size n Mb
...e to get 2.4 GB for R, but now comes the worse...
open R and create a data set of 1.5 GB, then reduce its size to 0.5 GB, the Resource Monitor shows my RAM is used at nearly 95%.
use gc() to do garbage collection => it works, I can see the memory use go down to 2 GB
Additional advice that wor...
Android Reading from an Input stream efficiently
... return writer.toString();
}
I always use UTF-8. You could, of course, set charset as an argument, besides InputStream.
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How to programmatically get iOS status bar height
...als 20.0f points except following cases:
status bar has been hidden with setStatusBarHidden:withAnimation: method and its height equals 0.0f points;
as @Anton here pointed out, during an incoming call outside of Phone application or during sound recording session status bar height equals 40.0f poi...
How to set variables in HIVE scripts
I'm looking for the SQL equivalent of SET varname = value in Hive QL
9 Answers
9
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