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Accessing class variables from a list comprehension in the class definition
...the class block; it does not extend to the code blocks of methods – this includes comprehensions and generator expressions since they are implemented using a function scope. This means that the following will fail:
class A:
a = 42
b = list(a + i for i in range(10))
So, to summarize: ...
How to select date from datetime column?
...rformance issues. As stated here:
it will calculate DATE() for all rows, including those that don't match.
it will make it impossible to use an index for the query.
Use BETWEEN or >, <, = operators which allow to use an index:
SELECT * FROM data
WHERE datetime BETWEEN '2009-10-20 00:00:0...
Is it possible to dynamically compile and execute C# code fragments?
...System.CodeDom, there are objects to represent all the artifacts that code includes - an object for a class, for an interface, for a constructor, a statement, a property, a field, and so on. I can then construct code using that object model. What is shown here in this answer is compiling a code fi...
Modify file in place (same dest) using Gulp.js and a globbing pattern
...fying the base would have worked as well. Updating the accepted answer to include the case of having no common base.
– numbers1311407
Nov 27 '15 at 18:02
...
C read file line by line
...g the getline() function (see the manual page here):
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
FILE * fp;
char * line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/etc/motd", "r");
if (fp == NULL)
exit(EXIT_FAILURE...
Delete files older than 3 months old in a directory using .NET
...ould like to know (using C#) how I can delete files in a certain directory older than 3 months, but I guess the date period could be flexible.
...
Getting realtime output using subprocess
... this supposed to hang indefinitely? I would wish a given solution to also include boilerplate code for editing the loop when the initial subprocess is done. Sorry I no matter how many time I look into it, subprocess etcetera is something I just can't ever get to work.
– ThorSu...
How to get a variable name as a string in PHP?
... Here you find a better implementation that works over several includes: stackoverflow.com/a/19788805/1069083
– rubo77
Nov 5 '13 at 12:35
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How do I remove an item from a stl vector with a certain value?
... That is the version of remove that deletes a file. You need to include <algorithm> in order to access the version of remove that deals with containers.
– Jim Buck
Aug 24 '13 at 17:00
...
How do I force Postgres to use a particular index?
...s doesn't use indexes when datatypes don't match properly, you may need to include appropriate casts.
Your planner settings might be causing problems.
See also this old newsgroup post.
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