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How to generate unique ID with node.js
How to set a variable value with database query callback? How I can do it?
13 Answers
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Does Android keep the .apk files? if so where?
After android installs an application from the Marketplace, does it keep the .apk file?
19 Answers
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C# pattern to prevent an event handler hooked twice [duplicate]
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Explicitly implement the event and check the invocation list. You'll also need to check for null:
using System.Linq; // Required for the .Contains call below:
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private EventHandler foo;
public event EventHandler Foo
{
add...
What is the string length of a GUID?
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It depends on how you format the Guid:
Guid.NewGuid().ToString() => 36 characters (Hyphenated)
outputs: 12345678-1234-1234-1234-123456789abc
Guid.NewGuid().ToString("D") => 36 characters (Hyphenated, same as ToString...
What is the difference between class and instance attributes?
... a.foo.append(5)
>>> b.foo
[5]
>>> class A:
... def __init__(self): self.foo = []
>>> a, b = A(), A()
>>> a.foo.append(5)
>>> b.foo
[]
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Android Spanned, SpannedString, Spannable, SpannableString and CharSequence
...on of CharSequence, followed by StringBuilder.
Spanned is a CharSequence with "spans" indicating formatting to apply to portions of the text, where those spans cannot be modified.
Spannable is a Spanned, adding in the ability to modify the spans (to add or remove formatting), but not to modify the...
jQuery Validate - require at least one field in a group to be filled
...up of fields. I think I've got a pretty good solution, and wanted to share it. Please suggest any improvements you can think of.
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Is it possible to specify the schema when connecting to postgres with JDBC?
Is it possible? Can i specify it on the connection URL? How to do that?
9 Answers
9
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(Built-in) way in JavaScript to check if a string is a valid number
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To check if a variable (including a string) is a number, check if it is not a number:
This works regardless of whether the variable content is a string or number.
isNaN(num) // returns true if the variable does NOT contain a valid number
Examples
isNaN(123) // false
isN...
Bring a window to the front in WPF
...Activate();
Attempts to bring the window to the foreground and activates it.
That should do the trick, unless I misunderstood and you want Always on Top behavior. In that case you want:
myWindow.TopMost = true;
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