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Ruby on Rails - Import Data from a CSV file
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It is better to wrap the database related process inside a transaction block. Code snippet blow is a full process of seeding a set of languages to Language model,
require 'csv'
namespace :lan do
desc 'Seed initial languages data with language & code'
task init_data: :environment do
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How to center a label text in WPF?
...here is a single line of text. To control the alignment you can use a TextBlock instead of a label and set the TextAlignment attribute to whatever you need.
– Paul Stegler
Sep 21 '13 at 7:20
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Using ZXing to create an Android barcode scanning app [duplicate]
...of the request code for the onActivityResult to check for in the above if block.
IntentIntegrator intentIntegrator = new IntentIntegrator(this); // where this is activity
intentIntegrator.initiateScan(IntentIntegrator.ALL_CODE_TYPES); // or QR_CODE_TYPES if you need to scan QR
IntentIntegrato...
How to test if list element exists?
...doesn't exist, it causes an out-of-bounds condition caught by the tryCatch block.
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How do I abort/cancel TPL Tasks?
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what if there is a blocking call which does not return inside the executing task?
– mehmet6parmak
Jun 26 '14 at 6:47
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Android: When should I use a Handler() and when should I use a Thread?
...y!!)! So, let me see if I got this: Handler is designed to facilitate non-blocking communication between worker threads and the UI thread?
– JRun
Dec 22 '12 at 9:14
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
...ould make more sense to return the updated/new object from this map.orElse block and then do what you need to do with the returned object.
– Matt
Jun 28 '18 at 17:12
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How do I make python wait for a pressed key?
...XTEN)
termios.tcsetattr(fd, termios.TCSANOW, attrs)
# turn off non-blocking
fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK)
# read a single keystroke
ret = []
try:
ret.append(sys.stdin.read(1)) # returns a single character
fcntl.fcntl(fd, fcntl...
Is it possible to use the instanceof operator in a switch statement?
... CLAZZ it throwns an Exception... it's better to surround with a try catch block and the Exception would be treated as the "default" or "else" option of the switch
– tetri
Feb 5 '15 at 10:31
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Eclipse JPA Project Change Event Handler (waiting)
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Done.
After uninstalling DALI/JPT my eclipse feels good again. No more blocked UI and waiting for seconds when saving a file.
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