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Why historically do people use 255 not 256 for database field magnitudes?
...onstrained otherwise). Most systems treat such an empty string as distinct from NULL, but some systems (notably Oracle) treat an empty string identically to NULL. For systems where an empty string is not NULL, an additional bit somewhere in the row would be needed to indicate whether the value shoul...
How to add a new row to datagridview programmatically
...ght");
this.dataGridView1.Rows.Insert(0, "one", "two", "three", "four");
From: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx
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How do I programmatically get the GUID of an application in .net2.0
...atively, you can use the GetTypeLibGuid method to extract the actual LIBID from an existing type library.
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Easiest way to convert a List to a Set in Java
...omeComparator);
lSet.addAll(myList);
This depends on either compareTo() (from the comparable interface) or compare() (from the comparator) to ensure uniqueness. So, if you just care about uniqueness, use the HashSet. If you're after sorting, then consider the TreeSet. (Remember: Optimize later!) I...
Revert to Eclipse default settings
...d up my problem. Also, the Show line numbers check box is on the last page from above.
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How to diff one file to an arbitrary version in Git?
How can I diff a file, say pom.xml , from the master branch to an arbitrary older version in Git?
13 Answers
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How to define an enum with string value?
...ng to bind it to a ComboBox as a data source so whenever I add or remove from the Enum definition, I would not need to change anything in the combo box.
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How to filter files when using scp to copy dir recursively?
I need to copy all the .class files from server to local with all dir reserved. e.g. server:/usr/some/unknown/number/of/sub/folders/me.class will be /usr/project/backup/some/unknown/number/of/sub/folders/me.class the problem is, there are many other useless files such as .svn-base files that i d...
Python integer division yields float
...e number of people do not realize this depending on the language they come from.
– mschuett
Mar 26 '19 at 15:19
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How do I check whether a file exists without exceptions?
...ffers an object-oriented approach (backported to pathlib2 in Python 2.7):
from pathlib import Path
my_file = Path("/path/to/file")
if my_file.is_file():
# file exists
To check a directory, do:
if my_file.is_dir():
# directory exists
To check whether a Path object exists independently ...