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String.format() to format double in java
... @MichaelFulton It's not that easy: String.format("%014.3f" , 58.656565) -> 0000000058,657: 14 symbols in total: 8 zeroes and 5 numbers and 1 comma. So in this case number 14 means the total number of symbols (extra ones get replaced with leading zero, could go without, then it would replace with...
Convert String to Float in Swift
...
import Foundation
"-23.67".floatValue // => -23.67
let s = "-23.67" as NSString
s.floatValue // => -23.67
The difference between fork(), vfork(), exec() and clone()
...the father sleep.
if ((clone_flags & CLONE_VFORK) && (retval > 0))
down(&sem);
return retval;
Here is the code(in mm_release() called by exit() and execve()) which awake the father.
up(tsk->p_opptr->vfork_sem);
For sys_clone(), it is more flexible since you can input a...
How to create a subdirectory for a project QtCreator?
...Creator?
Prior to QT Creator 3.1.x, you can right-click on your project -> "add new..." and change the path to the folder you want.
The folder must exists, Qt will not create it for you.
Qt takes care of the path in your .pro file.
That's it !
...
Cannot hide status bar in iOS7
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In the Plist add the following properties.
-> Status bar is initially hidden = YES
-> View controller-based status bar appearance = NO
Add both - now the status bar will disappear.
share...
What does 'synchronized' mean?
...More clearly: synchronized methods can't be called in the same time from multiple threads.
– peterh - Reinstate Monica
Mar 15 '16 at 12:35
...
Trim spaces from start and end of string
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Note: As of 2015, all major browsers (including IE>=9) support String.prototype.trim(). This means that for most use cases simply doing str.trim() is the best way of achieving what the question asks.
Steven Levithan analyzed many different implementation of trim in Jav...
How to get hosting Activity from a view?
...ec fun Context?.getActivity(): Activity? = when (this) {
is Activity -> this
else -> (this as? ContextWrapper)?.baseContext?.getActivity()
}
Usage in View class
context.getActivity()
Decompiled code:
public static final Activity getActivity(Context context) {
while (!(context ins...
Xcode iOS project only shows “My Mac 64-bit” but not simulator or device
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I figured it out. I had to edit the scheme (Product->Scheme->Edit Scheme...), and for some reason no executable was selected. I chose my app, saved and now I have my simulator and device options back.
...
Python 3: ImportError “No Module named Setuptools”
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EDIT: Official setuptools dox page:
If you have Python 2 >=2.7.9 or Python 3 >=3.4 installed from
python.org, you will already have pip and setuptools, but will need to
upgrade to the latest version:
On Linux or OS X:
pip install -U pip setuptools
On Windows:
...