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Find most frequent value in SQL column
...occurrence` DESC
LIMIT 1;
Replace column and my_table. Increase 1 if you want to see the N most common values of the column.
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How to delete a file after checking whether it exists
...
This is pretty straightforward using the File class.
if(File.Exists(@"C:\test.txt"))
{
File.Delete(@"C:\test.txt");
}
As Chris pointed out in the comments, you don't actually need to do the File.Exists check since File.Delete doesn't throw an exception if the file doesn'...
Is it possible to force ignore the :hover pseudoclass for iPhone/iPad users?
... Sometimes tap on element make that element ":hover", while sometimes it drifts to other elements.
For the time being, I just have a "no-touch" class at body.
<body class="yui3-skin-sam no-touch">
...
</body>
And have all CSS rules with ":hover" below ".no-touch":
.no-touch my:ho...
How to get the current directory in a C program?
...io.h>
#include <limits.h>
int main() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
printf("Current working dir: %s\n", cwd);
} else {
perror("getcwd() error");
return 1;
}
return 0;
}
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How to remove local (untracked) files from the current Git working tree
...rrent directory.
Normally, only files unknown to Git are removed, but if the -x option is specified, ignored files are also removed. This can, for example, be useful to remove all build products.
If any optional <path>... arguments are given, only those paths are affected.
Step 1...
Best algorithm for detecting cycles in a directed graph [closed]
...(all reachable nodes are visited along with the current one) color coding, if a grey node finds another grey node then we've a cycle. [Pretty much what we've in Cormen's algorithm book]. Wondering if 'Tarjan's algorithm' has any benefit over such DFS!!
– KGhatak
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Android Studio Multi-Windows for One Project
I'm wondering if anyone knows how to open two windows of Android Studio with both having the same project. I know you can drag tabs out, but that allows you to only edit that one file. I want two fully-featured windows with each being able to see the Project Files/Structure.
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How does zip(*[iter(s)]*n) work in Python?
How does zip(*[iter(s)]*n) work? What would it look like if it was written with more verbose code?
6 Answers
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How can I use a file in a command and redirect output to the same file without truncating it?
...le, and send the output back to the same file. Something along these lines if that makes it any clearer.
14 Answers
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Boolean method naming readability
...fered. As it makes your conditional checks far more like natural english:
if userExists ...
But I guess there is no hard and fast rule - just be consistent
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