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What does “use strict” do in JavaScript, and what is the reasoning behind it?
...ges.
In C, an extremely unfortunate representation of octalness was
selected: Leading zero. So in C, 0100 means 64, not 100, and 08 is an
error, not 8. Even more unfortunately, this anachronism has been
copied into nearly all modern languages, including JavaScript, where
it is only used...
Perl build, unit testing, code coverage: A complete working example
...ESS_PERL_SWITCHES}. For example: -MDevel::Cover=+ignore,.t$,+inc,/app/lib,-select,MyModule.pm where /app/lib is the application-private library and MyModule.pm is the module under test.
– Michael Carman
Apr 27 '10 at 16:33
...
How to handle dependency injection in a WPF/MVVM application
...would switch from one view to another within this region, e.g. as the user selects menu items or whatever.
Alternatively take a look at one of the MVVM frameworks such as MVVM Light. I've got no experience of these so can't comment on what they're like to use.
...
Algorithm to generate a crossword
...the previous steps can just be done once.
First step of the algorithm is select an empty wordslot (grid word) at random and fill it with a candidate word from its associated wordlist (randomization enables to produce different solutons in consecutive executions of the algorithm) ( complexity O(1)...
Filter rows which contain a certain string
... @MySchizoBuddy: If the column name contains white space, you can select the variable using backticks. Modifying the example above: mtcars$`my type` <- rownames(mtcars) and then mtcars %>% filter(grepl('Toyota|Mazda', `my type`))
– alex23lemm
Ju...
How do I determine the size of an object in Python?
... and module Class Tracker provides off-line analysis of the lifetime of
selected Python objects.
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...h
. $real_path
用户输入
执行脚本时传入脚本运行中输入select菜单stdin和stdout
常用的命令
sh脚本结合系统命令便有了强大的威力，在字符处理领域，有grep、awk、sed三剑客，grep负责找出特定的行，awk能将行拆分成多个字段，s...
How do you convert a byte array to a hexadecimal string, and vice versa?
... }
return result;
}
static uint[] _Lookup32 = Enumerable.Range(0, 255).Select(i => {
string s = i.ToString("X2");
return ((uint)s[0]) + ((uint)s[1] << 16);
}).ToArray();
static string ByteArrayToHexViaLookupPerByte(byte[] bytes) {
var result = new char[bytes.Length * 2];
...
How to find the kth smallest element in the union of two sorted arrays?
...ithmic. (Here we are getting rid of half). In order to do that, we need to select one array whose one of the halves we can safely ignore. How do we do that? By confidently eliminating the half we know for sure is not going to have the kth element.
– lambdapilgrim
...
How to implement a rule engine?
..."Contains", "C#" )
};
// compile the rules once
var compiledRules = rules.Select(r => CompileRule(r)).ToList();
public bool MatchesAllRules(User user)
{
return compiledRules.All(rule => rule(user));
}
Here is the implementation of BuildExpr:
Expression BuildExpr(Rule r, ParameterExpress...