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Android: View.setID(int id) programmatically - how to avoid ID conflicts?
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According to View documentation
The identifier does not have to be unique in this view's hierarchy. The identifier should be a positive number.
So you can use any positive integer you like, but in this case there can be some views with equivalent id's. If you want...
How to check whether a file or directory exists?
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func exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil { return true, nil }
if os.IsNotExist(err) { return false, nil }
return false, err
}
Edited to add error handling.
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屏幕控制使用指导 · App Inventor 2 中文网
...鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e.clientY - offsetY) + 'px'; }; // 鼠标释放时停止拖动 document.onmouseup = function(...
iPhone UITextField - Change placeholder text color
...iOS 6, it's possible to assign a color to the placeholder text like this:
if ([textField respondsToSelector:@selector(setAttributedPlaceholder:)]) {
UIColor *color = [UIColor blackColor];
textField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:placeholderText attributes:@{N...
C#: Assign same value to multiple variables in single statement
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If you want to test it, try Console.WriteLine(num = 5);. (Disclaimer: I haven't yet)
– Arlen Beiler
May 9 '13 at 19:36
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momentJS date string add 5 days
... After spending a few minutes, I realized the method WAS working, because if you open the object you get Moment _d : [The date with the addition] _f : "YYYY-MM-DDTHH:mm:ss" _i : [The original date]... The date has actually changed (you'll get the correct result with moment(startdate).add(5, 'days')...
Use ASP.NET MVC validation with jquery ajax?
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Using the jQuery.validate library should be pretty simple to set up.
Specify the following settings in your Web.config file:
<appSettings>
<add key="ClientValidationEnabled" value="true"/>
<add key="UnobtrusiveJavaScriptEnabled" value="true"/>
</appSettings>
Wh...
How do I bind a WPF DataGrid to a variable number of columns?
My WPF application generates sets of data which may have a different number of columns each time. Included in the output is a description of each column that will be used to apply formatting. A simplified version of the output might be something like:
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What is Lazy Loading?
...er Loading, where you load something right away, long before you need it.
If you are curious why people might use lazy loading, consider an application that takes a LOOOOONG time to start. This application is probably doing a lot of eager loading... loading things from disk, and doing calculations...
How to import CSV file data into a PostgreSQL table?
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actually use \copy would do the same trick if you do not have the super user access; it complaints on my Fedora 16 when using COPY with a non-root account.
– asksw0rder
Oct 15 '12 at 17:07
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