大约有 47,000 项符合查询结果(耗时:0.0503秒) [XML]

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How do I get a list of column names from a psycopg2 cursor?

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What is the default initialization of an array in Java?

...hing that holds an object) that is null. For int/short/byte/long that is a 0. For float/double that is a 0.0 For booleans that is a false. For char that is the null character '\u0000' (whose decimal equivalent is 0). When you create an array of something, all entries are also zeroed. So your arra...
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Is there a difference between using a dict literal and a dict constructor?

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How can I check the size of a collection within a Django template?

... MichielB 3,38011 gold badge2424 silver badges3535 bronze badges answered May 23 '09 at 17:53 Alex MartelliAlex Mar...
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What is a “memory stomp”?

...e are several common ways memory can be stomped. One is allocating, say, 100 bytes of memory but then storing something past the 100th address. This memory might be used to hold something completely different. This is particularly hard to debug because the problem will appear when something tries t...
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Python: using a recursive algorithm as a generator

... answered Oct 29 '08 at 23:53 Markus JarderotMarkus Jarderot 76.3k1717 gold badges126126 silver badges133133 bronze badges ...
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In Matlab, when is it optimal to use bsxfun?

... +500 There are three reasons I use bsxfun (documentation, blog link) bsxfun is faster than repmat (see below) bsxfun requires less typin...
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Finding the index of elements based on a condition using python list comprehension

... answered Sep 1 '11 at 13:20 Mike GrahamMike Graham 60.5k1212 gold badges8484 silver badges119119 bronze badges ...
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Checkboxes in web pages – how to make them bigger?

...r. input[type='checkbox'] { -webkit-appearance:none; width:30px; height:30px; background:white; border-radius:5px; border:2px solid #555; } input[type='checkbox']:checked { background: #abd; } <input type="checkbox" /> ...
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What is the purpose of XORing a register with itself? [duplicate]

...etimes put it in my executable's code? Is it more efficient that mov eax, 0 ? 7 Answers ...