大约有 44,686 项符合查询结果（耗时：0.0340秒） [XML]
how to install gcc on windows 7 machine?
...this purpose. I checked the following page : http://gcc.gnu.org/install/
It is difficult and I find it above my level of understanding.
Could any one please provide me step by step guidance along with links?
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Mongo interface [closed]
What are some GUIs to use with Mongo, and what features do they offer? I'm looking for facts here, not opinions on which interface is best.
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Getting a list of associative array keys
...onary);
console.log(keys);
See reference below for browser support. It is supported in Firefox 4.20, Chrome 5, and Internet Explorer 9. Object.keys() contains a code snippet that you can add if Object.keys() is not supported in your browser.
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How to add onload event to a div element
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No, you can't. The easiest way to make it work would be to put the function call directly after the element
Example:
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<div id="somid">Some content</div>
<script type="text/javascript">
oQuickReply.swap('somid');
</script>
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or ...
invalid byte sequence for encoding “UTF8”
...s some invalid UTF8 data in your source file. That means that the copy utility has detected or guessed that you're feeding it a UTF8 file.
If you're running under some variant of Unix, you can check the encoding (more or less) with the file utility.
$ file yourfilename
yourfilename: UTF-8 Unicode ...
How do I check if an array includes a value in JavaScript?
...ontains(array, value) (also aliased as _.include and _.includes)
Dojo Toolkit: dojo.indexOf(array, value, [fromIndex, findLast])
Prototype: array.indexOf(value)
MooTools: array.indexOf(value)
MochiKit: findValue(array, value)
MS Ajax: array.indexOf(value)
Ext: Ext.Array.contains(array, value)
Lodash...
In Perl, how can I read an entire file into a string?
...dules you want. See How do I keep my own module/library directory?.
In addition, Path::Class::File allows you to slurp and spew.
Path::Tiny gives even more convenience methods such as slurp, slurp_raw, slurp_utf8 as well as their spew counterparts.
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How to generate a range of numbers between two numbers?
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Select non-persisted values with the VALUES keyword. Then use JOINs to generate lots and lots of combinations (can be extended to create hundreds of thousands of rows and beyond).
SELECT ones.n + 10*tens.n + 100*hundreds.n + 1000*thousands.n
FROM (VALUE...
Difference between virtual and abstract methods [duplicate]
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Virtual methods have an implementation and provide the derived classes with the option of overriding it. Abstract methods do not provide an implementation and force the derived classes to override the method.
So, abstract methods have no actual code in them, and subclasses HAVE TO override the ...
Unable to Cast from Parent Class to Child Class
...mple way to downcast in C# is to serialize the parent and then deserialize it into the child.
var serializedParent = JsonConvert.SerializeObject(parentInstance);
Child c = JsonConvert.DeserializeObject<Child>(serializedParent);
I have a simple console app that casts animal into dog, usi...