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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
In PostgreSQL I have a table with a varchar column. The data is supposed to be integers and I need it in integer type in a query. Some values are empty strings.
The following:
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How does this program work?
It displays a 0 !! How is that possible? What is the reasoning?
13 Answers
13
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Java project in Eclipse: The type java.lang.Object cannot be resolved. It is indirectly referenced f
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This is an annoying Eclipse Bug which seems to bite now and then. See http://dev-answers.blogspot.de/2009/06/eclipse-build-errors-javalangobject.html for a possible solution, otherwise try the following;
Close the project and reopen it.
Clean the project (It will rebuild...
What data type to use for hashed password field and what length?
I'm not sure how password hashing works (will be implementing it later), but need to create database schema now.
10 Answers...
Is it possible to perform a 'grep search' in all the branches of a Git project?
Is it possible to run git grep inside all the branches of a Git control sourced project? Or is there another command to run?
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Bash function to find newest file matching pattern
... has a parameter -t to sort by time. You can then grab the first (newest) with head -1.
ls -t b2* | head -1
But beware: Why you shouldn't parse the output of ls
My personal opinion: parsing ls is only dangerous when the filenames can contain funny characters like spaces or newlines. If you can g...
C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?
... to use DateTime.Now instead. The value of DateTime.Now changes every time it's executed. Or suppose that TimeSpan.FromSeconds took into account gravity. It's an absurd example but the rules of compile-time constants don't make special cases just because we happen to know that TimeSpan.FromSeconds i...
Passing data between controllers in Angular JS?
...follow
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edited Feb 13 '19 at 22:17
answered Nov 24 '13 at 21:54
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How to convert string representation of list to a list?
...import ast
>>> x = u'[ "A","B","C" , " D"]'
>>> x = ast.literal_eval(x)
>>> x
['A', 'B', 'C', ' D']
>>> x = [n.strip() for n in x]
>>> x
['A', 'B', 'C', 'D']
ast.literal_eval:
With ast.literal_eval, you can safely evaluate an expression node or a st...
Stop the 'Ding' when pressing Enter
...u press Enter while inside a Single-line TextBox Control, you hear a Ding. It's an unpleasent sound, that indicated you cannot enter a newline, because it is a single-line TextBox.
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