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What does @media screen and (max-width: 1024px) mean in CSS?
...ut a media query and use 'max-width' to overwrite this when it goes to a smaller device
– MintWelsh
Jun 16 '15 at 12:01
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Delete keychain items when an app is uninstalled
...ou can take advantage of the fact that NSUserDefaults are cleared by uninstallation of an app. For example:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//Clear keychain on first run in case of reinstallation
if (![[NSUserDef...
Textarea to resize based on content length [duplicate]
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If you textarea is too tall and generates scroll on the page and you happen to have your page scrolled down, this will reset the scroll position to the top when you 'height = 1px'. To avoid it you can assign the height to the textarea's parent tempo...
grep a file, but show several surrounding lines?
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Ok, but what if want to show all lines of output after the match? grep -A0 and grep -A-1 don't cut it...
– g33kz0r
Jul 22 '11 at 2:18
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Random date in C#
...tart.AddDays(gen.Next(range));
}
For better performance if this will be called repeatedly, create the start and gen (and maybe even range) variables outside of the function.
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What does ':' (colon) do in JavaScript?
...
var o = {
r: 'some value',
t: 'some other value'
};
is functionally equivalent to
var o = new Object();
o.r = 'some value';
o.t = 'some other value';
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Convert InputStream to byte array in Java
...a byte[].
InputStream is;
byte[] bytes = IOUtils.toByteArray(is);
Internally this creates a ByteArrayOutputStream and copies the bytes to the output, then calls toByteArray(). It handles large files by copying the bytes in blocks of 4KiB.
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Getting name of the class from an instance
... Remember to #import <objc/objc-runtime.h> to able to call class on an instance.
– JP Illanes
Mar 11 '15 at 8:04
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Multiline TextView in Android?
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If the text you're putting in the TextView is short, it will not automatically expand to four lines. If you want the TextView to always have four lines regardless of the length of the text in it, set the android:lines attribute:
<TextView
android:id="@+id/address1"
android:gravity="left...
Git for Windows: .bashrc or equivalent configuration files for Git Bash shell
I've just installed Git for Windows and am delighted to see that it installs Bash.
12 Answers
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