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How to write to file in Ruby?
..."your text")
rescue IOError => e
#some error occur, dir not writable etc.
ensure
file.close unless file.nil?
end
You can find it in documentation:
static VALUE rb_io_s_open(int argc, VALUE *argv, VALUE klass)
{
VALUE io = rb_class_new_instance(argc, argv, klass);
if (rb_block_give...
Update a record without first querying?
...rty populated) all the other properties has their default values (0, null, etc). If you want to update the DB with a "default value", the change will not be detected by entity framework, and then DB will not be updated.
In example:
exampleEntity.ExampleProperty = null;
will not work without th...
Best way to alphanumeric check in JavaScript
...th special character letters used in some languages, like "ą", "ź", "ć" etc.
– Rafał Swacha
Jan 15 '16 at 12:01
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show 5 more comments
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How to get enum value by string or int
...h necessary defensive coding to check for type safety and invalid parsing, etc.
/// <summary>
/// Extension method to return an enum value of type T for the given string.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="value">&l...
What is the function __construct used for?
...after it has been created, and is a good place to put initialisation code, etc.
class Person {
public function __construct() {
// Code called for each new Person we create
}
}
$person = new Person();
A constructor can accept parameters in the normal manner, which are passed whe...
Which HTML elements can receive focus?
...E -10 (11+?) can focus any element with display block or table (div, span, etc.).
– mems
Jan 9 '15 at 19:40
15
...
Export query result to .csv file in SQL Server 2008
...et any options. For example all the NULLs show in output files as "NULL", etc. Perhaps there is a way to set this that I don't know about, however.
– Noah
Sep 6 '13 at 7:36
14
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Subversion stuck due to “previous operation has not finished”?
... such a mess with Git (so far). I ended up cleaning / reverting / cleaning etc. on any directory I could, if Svn would let me.
– aliopi
Jul 13 '17 at 7:16
...
What are the uses for Cross Join?
...ssue over a specific combination of items and dates (prices, availability, etc..). You could load the items and dates into separate temp tables and have your queries cross join the tables. This may be more convenient than the alternative of enumerating the items and dates in IN clauses, especially s...
How to print an exception in Python?
... instead of STDOUT, which allows for the proper output parsing/redirection/etc. I understand that the question was strictly about 'printing an error', but it seems important to point out the best practice here rather than leave out this detail that could lead to non-standard code for anyone who does...