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JavaScript validation for empty input field

...orm" onsubmit="return validateForm()" action=""> <textarea cols="30" rows="2" name="answer_a" id="a"></textarea> <textarea cols="30" rows="2" name="answer_b" id="b"></textarea> <textarea cols="30" rows="2" name="answer_c" id="c"></textarea> <text...
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Display a float with two decimal places in Python

...nd I need to output the values in a string with two decimal places (5 -> 5.00, 5.5 -> 5.50, etc). How can I do this in Python? ...
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Memcache Vs. Memcached [duplicate]

... answered Dec 1 '09 at 10:21 MezMez 21.6k1414 gold badges6565 silver badges9191 bronze badges ...
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Set initial focus in an Android application

... answered Apr 30 '10 at 10:33 MatthiasMatthias 40.8k2828 gold badges9898 silver badges127127 bronze badges ...
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How can I cast int to enum?

... answered Aug 27 '08 at 3:59 FlySwatFlySwat 155k6666 gold badges240240 silver badges307307 bronze badges ...
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Best way to define private methods for a class in Objective-C

...ing as a private method in Objective-C. However, starting in Objective-C 2.0 (meaning Mac OS X Leopard, iPhone OS 2.0, and later) you can create a category with an empty name (i.e. @interface MyClass ()) called Class Extension. What's unique about a class extension is that the method implementations...
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Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=

... Ross Smith IIRoss Smith II 10.4k11 gold badge3030 silver badges4040 bronze badges ...
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How do you merge two Git repositories?

... | edited May 7 '18 at 10:44 answered Feb 20 '13 at 23:44 ...
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Color text in terminal applications in UNIX [duplicate]

... you could use color codes: #include <stdio.h> #define KNRM "\x1B[0m" #define KRED "\x1B[31m" #define KGRN "\x1B[32m" #define KYEL "\x1B[33m" #define KBLU "\x1B[34m" #define KMAG "\x1B[35m" #define KCYN "\x1B[36m" #define KWHT "\x1B[37m" int main() { printf("%sred\n", KRED); ...
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Concurrent vs serial queues in GCD

...| edited Dec 1 '15 at 13:50 answered Oct 4 '13 at 11:12 Ste...