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Convert a python dict to a string and back
I am writing a program that stores data in a dictionary object, but this data needs to be saved at some point during the program execution and loaded back into the dictionary object when the program is run again.
How would I convert a dictionary object into a string that can be written to a file and...
Virtual member call in a constructor
...g from ReSharper about a call to a virtual member from my objects constructor.
18 Answers
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Running a cron job at 2:30 AM everyday
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crontab -e
Add this command line:
30 2 * * * /your/command
Crontab Format:
MIN HOUR DOM MON DOW CMD
Format Meanings and Allowed Value:
MIN Minute field 0 to 59
HOUR Hour field 0 to 23
DOM Day of Month 1-31
MON Month field 1-12
DOW Day Of Week 0-6
CMD...
Objective-C pass block as parameter
...o a method is as follows:
- (void)iterateWidgets:(void (^)(id, int))iteratorBlock;
But as you can see, that's messy. You can instead use a typedef to make block types cleaner:
typedef void (^ IteratorBlock)(id, int);
And then pass that block to a method like so:
- (void)iterateWidgets:(Iterat...
Intent - if activity is running, bring it to front, else start a new one (from notification)
...name=".YourActivity"
android:launchMode="singleTask"/>
which will work similar to "singleInstance" but it won't have that weird animation.
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How do I wait for an asynchronously dispatched block to finish?
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Trying to use a dispatch_semaphore. It should look something like this:
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
[object runSomeLongOperationAndDo:^{
STAssert…
dispatch_semaphore_signal(sema);
}];
if (![NSThread isMainThread]...
Java: What is the difference between and ?
...to understand the following text... Does it mean that <clinit> is for empty constructors? Why is important to have two different versions?
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Best XML parser for Java [closed]
... and write the XML back out again to disk (preferably with nice, indented formatting).
8 Answers
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Sending an HTTP POST request on iOS
...response (from the urlconnection). I never get a response from the server nor does the server detect my posts (the server does detect posts coming from android)
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Responsive css background images
I have a website (g-floors.eu) and I want to make the background (in css I have defined a bg-image for the content) also responsive. Unfortunately I really don't have any idea on how to do this except for one thing that I can think of but it's quite a workaround. Creating multiple images and then us...