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Delete sql rows where IDs do not have a match from another table
...HERE f.id IS NULL
Using NOT EXISTS:
DELETE FROM BLOB
WHERE NOT EXISTS(SELECT NULL
FROM FILES f
WHERE f.id = fileid)
Using NOT IN:
DELETE FROM BLOB
WHERE fileid NOT IN (SELECT f.id
FROM FILES f)
Warning
Whenever possible, per...
Bundler: Command not found
...
My solution was to make sure I selected a version of Ruby for that repo.
Example: chruby 2.2.2 or rvm use 2.2.2
λ bundle install
zsh: command not found: bundle
λ ruby -v
ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux]
### Notice the system ...
Which version of MVC am I using?
...
Select the System.Web.Mvc assembly in the "References" folder in the solution explorer. Bring up the properties window (F4) and check the Version
...
What is the meaning of the term arena in relation to memory?
... manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void * my_malloc(size_t n) { current += n; return arena + current - n; }
The point is that you get full control over how the memory allocation works. The only ...
How to get the raw value an field?
...
Spudly has a useful answer that he deleted:
Just use the CSS :invalid selector for this.
input[type=number]:invalid {
background-color: #FFCCCC;
}
This will trigger your element to turn red whenever a non-numeric
valid is entered.
Browser support for <input type='number'>...
delete word after or around cursor in VIM
... Probably worth mentioning that aw is one example of object selection. You can try object selections in visual mode to see what effect they have: vimdoc.sourceforge.net/htmldoc/motion.html#object-select
– crantok
Dec 29 '18 at 16:49
...
iPhone Debugging: How to resolve 'failed to get the task for process'?
...but resolved it by following simple following steps :
Make sure you have selected debug rather than release.
In Debug configurations, in project settings, you should have selected developer's profile & no need of specifying the entitlements plist.
Also same setting are there under: Targets: , ...
What is the most appropriate way to store user settings in Android application
... protected static final String UTF8 = "utf-8";
private static final char[] SEKRIT = ... ; // INSERT A RANDOM PASSWORD HERE.
// Don't use anything you wouldn't want to
// get out there if someone deco...
What is more efficient? Using pow to square or just multiply it with itself?
...d::chrono::high_resolution_clock::time_point from;
};
int main (int argc, char* argv[])
{
double total;
Timer timer;
total = 0.0;
timer.start();
for (double i = 0.0; i < 1.0; i += 1e-8)
total += std::pow (i,2);
std::cout << "std::pow(i,2): " << timer.elapsed() <...
Real differences between “java -server” and “java -client”?
...ient option is ignored for many years.
See Windows java command:
-client
Selects the Java HotSpot Client VM.
A 64-bit capable JDK currently ignores this option and instead uses the Java Hotspot Server VM.
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