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How to empty (“truncate”) a file on linux that already exists and is protected in someway?
I have a file called error.log on my server that I need to frequently truncate. I have rw permissions for the file. Opening the file in vi > deleting all content > saving works (obviously). But when I try the below
...
How can I add CGPoint objects to an NSArray the easy way?
... as many [NSValue] instances as you have CGPoint, and end the list in nil. All objects in this structure are auto-released.
On the flip side, when you're pulling the values out of the array:
NSValue *val = [points objectAtIndex:0];
CGPoint p = [val CGPointValue];
...
.NET Configuration (app.config/web.config/settings.settings)
...ration levels.)
These are the kinds of configuration elements that I typically store at the machine level:
Application settings
Connection strings
retail=true
Smtp settings
Health monitoring
Hosting environment
Machine key
When each environment (developer, integration, test, stage, live) has it...
jQuery .live() vs .on() method for adding a click event after loading dynamic html
... you want the click handler to work for an element that gets loaded dynamically, then you set the event handler on a parent object (that does not get loaded dynamically) and give it a selector that matches your dynamic object like this:
$('#parent').on("click", "#child", function() {});
The event...
When should I use a struct rather than a class in C#?
...imes when the item is merely a collection of value types . A way to logically hold them all together into a cohesive whole.
...
Is it possible to adjust x,y position for titleLabel of UIButton?
... I didn't even need the first two lines... setTitleEdgeInsets: was all I found necessary to shift the text around.
– ArtOfWarfare
Jan 1 '13 at 18:34
...
How to get the last element of a slice?
...eft it outside consciously. It was non-obvious and prone to errors. Go overall is circumspect about 'too much meaning'; it also doesn't feature method/operator overloading, default values for function params, etc. which IMHO goes in a similar philosophical vein. See this discussion and others: group...
PCH File in Xcode 6
...t; Other > PCH File > YourProject-Prefix.pch.
Make sure you display "All" and not "Basic". (Blue buttons)
Project > Build Settings > Search: "Prefix Header".
Under "Apple LLVM 7.0" you will get the Prefix Header key.
Type file directory. e.g: "$(SRCROOT)/$(PROJECT_NAME)/ProjectName-Prefi...
Can I hide the HTML5 number input’s spin box?
...e: textfield;
}
In some cases, you may want the spinner to be hidden initially, and then appear on hover/focus. (This is currently the default behavior in Chrome). If so, you can use the following:
input[type="number"] {
-moz-appearance: textfield;
}
input[type="number"]:hover,
input[type="...
Check if a Python list item contains a string inside another string
...abc-456']
if any("abc" in s for s in some_list):
# whatever
If you really want to get all the items containing abc, use
matching = [s for s in some_list if "abc" in s]
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