remove map, but traversing the map is still very good.new HashMaplong t5 = System.currentTimeMillis();for (Integer key : map.keySet()) {}for (Integer value : map.values()) {}long t6 = System.currentTimeMillis();System.out.println("for each map.keySet()、map.values()耗时:" + (t6 - t5));But here, Wang Er has something to say, according to StackOverflow, the method is better than the next fourth method of "For-each iterative Entries" (about 10% faster), but in my practice it's not the same way as the
10% faster ), but this is not the case in my practice. This method is much slower than the fourth "For-Each iteration entries.④ Method 4: For-Each iteration entries
Map
Map = new HashMap
(); AddMap (map); long t7 = System. currentTimeMillis (); for (Entry
Entry: map. entrySet () {Integer key = entry. getKey (); Integer value = entry. getValue ();} long t8 = Syst
$ t73 = clone $ t71; $ t71-> age = 13; var_dump ($ t71-> age );Var_dump ($ t73-> age); // If a member attribute in the instance is also an instance, the member attribute will still be passed to the new instance as a reference method. Copy codeThe Code is as follows:Class test74 {Public $ age = 10;Public $ sub = null;}Class test75 {Public $ age = 11;}$ I = new test74;$ I-> sub = new test75 ();$ I1 = clone $ I;Var_dump ($ i1-> sub-> age );$ I-> sub-> age = 12;Var_dump ($ i1-> sub-> age ); // Alth
= new test71 ();$ T72 = $ t71;Var_dump ($ t71-> age );$ T71-> age = 12;Var_dump ($ t71-> age );Var_dump ($ t72-> age); // If you want to pass with the actual value, you need to use the clone keyword $ t73 = clone $ t71; $ t71-> age = 13; var_dump ($ t71-> age );Var_dump ($ t73-> age); // if a member attribute in the instance is also an instance, the member attribute will still be passed to the new instance as a reference method.
The code is as follows:
Class test74 {Public $ age = 10;Public
, F2 ,..., f8) generates eight fingerprints for this address: s1, s2 ,..., s8, and then map the eight fingerprints to the eight binary digits of the Bloom filter, t1, t2 ,..., t8. If Y is in the blacklist, it is clear that the eight binary values corresponding to t1, t2,... and t8 must be one. In this way, we can accurately find any email address in the blacklist. The Bloom filter will never miss any suspic
In ucos ii, readiness groups and readiness tables are basic concepts. Understanding the meaning is crucial to understanding task management and event management of ucos ii.
A ready group is essentially an 8-bit unsigned variable. Each bit of the ready group variable indicates whether there are ready tasks in a group of eight tasks. UCOS gives this variable a special meaning: when its bit0 is 1, it indicates the task 0 ~ At least one task in task 7 is ready. When its bit1 value is 1, the task 8
these eight fingerprints to the Bron filter eight bits, respectively T1,t2,..., T8. If Y is in the blacklist, it is clear that the T1,T2,.., T8 corresponding Eight binary must be one . This way, we can find out exactly what the email address is in the blacklist.The Bron filter never misses any suspicious address in the blacklist. However, it has one shortcoming. That is, it has a very small possibility to
compiler will automatically generate a class that inherits from System.MulticastDelegate, with the method name Class name, and adds the BeginInvoke and EndInvoke methodsusingSystem; Public Delegate voidCustomdelaget (); //using the delegate keyword compiler will automatically generate a class that inherits from System.MulticastDelegate/*. class public auto ANSI sealed customdelaget extends [mscorlib]system.multicastdelegate{}//End of Class Custom Delaget*/classapp{Static voidMain () {customdela
The array merges objects of the same type, while the ancestor merges objects of different types. The ancestor originated from the function programming language (F #)Net Framework defines eight generic tuple (from net4.0) and a static tuple class. They act on the factory of the original ancestor,Different generic tuple classes support different numbers of elements. For example, tuple
/* Creator: the blog of caidao jushi* Creation date: January 1, July 14, 2014*/
Namespace net. String. consoleap
Http://blogold.chinaunix.net/u1/40363/showart_434187.htmlchapter II register conventions
For the development of a CPU, it is very important to master the register conventions of the CPU in which it works.
The MIPS architecture provides 32 GPR (general purpose register ). The usage of these 32 registers is roughly as follows:
REGISTER NAME USAGE$0 $ zero constant 0 (constant value 0)$2-$3 $ v0-$ return value of v1 function call (values for results and expression evaluation)$4-$7 $ a0-$ a3 functi
". Opportunities are only relative to those who are fully prepared and good at creating opportunities. Maybe, when you regret or complain about losing a chance, the opportunity is being held by the same "Bad Luck" opposite you. If you have no chance, you must create one. If you have the opportunity, you must seize it skillfully.2 m, B/B; _) Y + x: B (D9 R3 o! R4 I * n'X $ J $ J0 R; k! J J7 H6 t! B H8 o 'E. g) A $ v) Q9! G7 V6 '5 C5 t8. If the phone k
objective function. A good objective function can make all the difference.De-Applet
De is demonstrated here by example of the polynomial fitting problem (see techreport by Rainer and Ken ). the task is to fit a polynomial of a certain degree into the tolerance Scheme indicated by the red lines. at X-values +/-1.2 The polynomial must be higher than Tk (x) with TK (x) being the Chebychev polynomial of Degree k. the constraint at +/-1.2 can't be seen in the animation as it is fairly L Arge (~ 5.9
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