计算一个角色 [英] Counting A Character
本文介绍了计算一个角色的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
大家好我有一个文本框和textBox1.Text例如：杰克#Alex #Marlo #Jimmy #Bob
现在我想知道文本框中有多少[＃]，我知道它的4 [＃]在那句话中，但不知道如何计算
plzzzzzz帮助我
hi guys i have a textbox and textBox1.Text is for example: Jack#Alex#Marlo#Jimmy#Bob
now i wanna find out how many [#] is there in the textbox, i know its 4 [#] in that sentence but dont know how to get that count
plzzzzzz help me
推荐答案
受到关于不必要的讨论的启发ToArray（）方法调用，我决定发布这个答案，以提供有关两种解决方案中使用的方法之间差异的更多信息（解决方案1和解决方案2）。
最重要的陈述是： 两种解决方案都是等价的 并返回完全相同的结果！
即使差异很小（在代码编译和执行的范围 - 见下表），在这种情况下无关紧要！只有在执行字符串比较时才会有所不同。
解决方案1 解决方案2 查询语法 方法语法 IL指令（由LinqPad 4生成） ）：
Inspired by the discussion about "unnecessary ToArray() method call", i decide to post this answer to bring more information about the "differences" between methods used in a both solutions (solution 1 and solution 2).
The most important statement is: Both solutions are equivalent and return exactly the same result!
Even if there are few differences (in a scope of code compilation and execution - see below table), it doesn't matter in this case! It might makes a difference only in case when the set of strings comparison is performed.
Solution 1 Solution 2 query syntax method syntax IL instructions (generated by LinqPad 4):
IL_0001: ldstr "Jack#Alex#Marlo#Jimmy#Bob" IL_0006: stloc.0 // s IL_0007: ldloc.0 // s IL_0008: call System.Linq.Enumerable.ToArray IL_000D: ldsfld UserQuery.CS
<> 9__CachedAnonymousMethodDelegate1
IL_0012：brtrue.s IL_0027
IL_0014：ldnull
IL_0015：ldft n b__0
IL_001B：newobj System.Func< System。 Char ，System.Boolean> .. ctor
IL_0020：stsfld UserQuery.CS<>9__CachedAnonymousMethodDelegate1 IL_0012: brtrue.s IL_0027 IL_0014: ldnull IL_0015: ldftn b__0 IL_001B: newobj System.Func<System.Char,System.Boolean>..ctor IL_0020: stsfld UserQuery.CS
<> 9__CachedAnonymousMethodDelegate1
IL_0025：br.s IL_0027
IL_0027：ldsfld UserQuery.CS<>9__CachedAnonymousMethodDelegate1 IL_0025: br.s IL_0027 IL_0027: ldsfld UserQuery.CS
这篇关于计算一个角色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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