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iOS: Convert UTC NSDate to local Timezone

...e:@"EST"]]; [df_local setDateFormat:@"yyyy.MM.dd G 'at' HH:mm:ss zzz"]; NSString* ts_utc_string = [df_utc stringFromDate:ts_utc]; NSString* ts_local_string = [df_local stringFromDate:ts_utc]; // you can also use NSDateFormatter dateFromString to go the opposite way Table of formatting string par...
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How to create a custom exception type in Java? [duplicate]

... // Constructor that accepts a message public WordContainsException(String message) { super(message); } } Usage: try { if(word.contains(" ")) { throw new WordContainsException(); } } catch(WordContainsException ex) { // Process message h...
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Boost Statechart vs. Meta State Machine

... As there seems to be much interest, please allow me to give my (obviously biased) opinion, which should therefore be taken with a grain of salt: MSM is much faster MSM requires no RTTI or anything virtual MSM has a more complete UML2 support (for example internal tr...
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TreeMap sort by value

...); return sortedEntries; } Now you can do the following: Map<String,Integer> map = new TreeMap<String,Integer>(); map.put("A", 3); map.put("B", 2); map.put("C", 1); System.out.println(map); // prints "{A=3, B=2, C=1}" System.out.println(entriesSorte...
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Ruby combining an array into one string

In Ruby is there a way to combine all array elements into one string? 3 Answers 3 ...
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How to print a float with 2 decimal places in Java?

... Please be carefull as String.format depend on your current Local configuration, you may not get a dot as a separator. Prefer using String.format(java.util.Locale.US,"%.2f", val); – Gomino Mar 2 '16 at 16:59 ...
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Why does 0.ToString(“#.##”) return an empty string instead of 0.00 or at least 0?

Why does 0.ToString("#.##") return an empty string? Shouldn't it be 0.00 or at least 0 ? 5 Answers ...
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Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?

I see many different Java terms floating around. I need to install the JDK 1.6. It was my understanding that Java 6 == Java 1.6. However, when I install Java SE 6, I get a JVM that reports as version 11.0! Who can solve the madness? ...
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How to pass multiple parameters in a querystring

... Query_string (Following is the text of the linked section of the Wikipedia entry.) Structure A typical URL containing a query string is as follows: http://server/path/program?query_string When a server receives a request for such a...
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How to cast an Object to an int

...dered/boxed as an Integer then stored as an Object. If your object is a String, then you can use the Integer.valueOf() method to convert it into a simple int : int i = Integer.valueOf((String) object); It can throw a NumberFormatException if your object isn't really a String with an integer as...