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Automate ssh-keygen -t rsa so it does not ask for a passphrase

... On RHEL 6, I got this error: "ssh-keygen: option requires an argument -- N" :( – Anthony O. Dec 9 '15 at 15:02 1 ...
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How to validate a url in Python? (Malformed or not)

...alidators import URLValidator from django.core.exceptions import ValidationError val = URLValidator(verify_exists=False) try: val('http://www.google.com') except ValidationError, e: print e If you set verify_exists to True, it will actually verify that the URL exists, otherwise it will ju...
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Find out if string ends with another string in C++

...fix.rbegin(), suffix.rend(), str.rbegin() In debug mode, it throws: _DEBUG_ERROR("string iterator not decrementable"); – remi.chateauneu May 28 '14 at 16:31 ...
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Rename a table in MySQL

...and not the single quote ' I did the single quote from habit, and got the error, but maybe this will save someone else 10 seconds – Paul Feb 3 '14 at 18:05 ...
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round() doesn't seem to be rounding properly

... If you get this error NameError: global name 'ROUND_UP' is not defined you need to import your rounding function: from decimal import Decimal, ROUND_UP. Other rounding functions – Stephen Blair Jul 18 '...
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How can I group data with an Angular filter?

...el M. when combined with other $filters triggered an "Infite $diggest Loop Error" (infdig). Fortunately this issue has been solved in the latest version of the angular.filter. I suggested the following implementation, that didn't have that issue: angular.module("sbrpr.filters", []) .filter('groupBy'...
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How to get object size in memory? [duplicate]

...t class defined as serializable and it threw a "Not marked as serializable error" – dreamerkumar Nov 29 '12 at 20:23 2 ...
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How to suppress scientific notation when printing float values?

...cify how many digit after the . you wish to display, this depends on how small is the floating number). See this example: >>> a = -7.1855143557448603e-17 >>> '{:f}'.format(a) '-0.000000' as shown above, default is 6 digits! This is not helpful for our case example, so instead we...
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Ask for User Permission to Receive UILocalNotifications in iOS 8

...starting from iOS7. So, when I run this code on an iOS7 device, I get this error: dyld: Symbol not found: _OBJC_CLASS_$_UIUserNotificationSettings. Is there any other way in Swift to ask user for permissions in order to work in iOS7? please help. – Raghavendra ...
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How to avoid isset() and empty()

...is undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts. ...