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Postgres: clear entire database before re-creating / re-populating from bash script
...elopment_db_name
$ createdb developmnent_db_name
That's how I do it, actually.
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Global variables in Java
...
public static int b;
}
now you can access a and b from anywhere
by calling
Example.a;
Example.b;
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Duplicate and rename Xcode project & associated folders [closed]
...the associated files without Xcode going mental, and without having to manually re-import all files to the project.
9 Answe...
SQL update fields of one table from fields of another one
... The question is asking about how to do it without specifying all the column names. (And I am too.)
– cluesque
Jun 6 '12 at 16:29
2
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Regexp Java for password validation
...ecial character must occur at least once
(?=\S+$) # no whitespace allowed in the entire string
.{8,} # anything, at least eight places though
$ # end-of-string
It's easy to add, modify or remove individual rules, since every rule is an independent "module".
Th...
What does collation mean?
...y the ASCII code.
Once you get into those strange European languages with all their accents and other features, collation changes. For example, though the different accented forms of a may exist at disparate code points, they may all need to be sorted as if they were the same letter.
...
Deleting an object in java?
...r leaving the block where it was declared. After that, it will be automatically deleted by the garbage collector (not immediately, but eventually).
Example 1:
Object a = new Object();
a = null; // after this, if there is no reference to the object,
// it will be deleted by the garbage co...
How to convert a string to lower case in Bash?
...ous ways:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# t...
Select Last Row in the Table
...cending.
As an example, if you have a time stamp when the upload was done called upload_time, you'd do something like this;
For Pre-Laravel 4
return DB::table('files')->order_by('upload_time', 'desc')->first();
For Laravel 4 and onwards
return DB::table('files')->orderBy('upload_time',...
Cannot ping AWS EC2 instance
...
Thank you, I like this. I just want to allow the ping, not all.
– Chu-Siang Lai
Nov 25 '16 at 11:29
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