大约有 30,000 项符合查询结果(耗时:0.0573秒) [XML]

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What is a predicate in c#? [duplicate]

...urns a % 2 == 0. This is essentially testing for an even number. What that means is: pre(1) == false; pre(2) == true; And so on. This also means, if you have a List<int> ints and you want to find the first even number, you can just do this: int firstEven = ints.Find(pre); Of course, as w...
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Add a default value to a column through a migration

... What do you mean when you say "make sure you update the field manually on the migration"? How does one do that? – David Argyle Thacker Jan 8 '16 at 21:51 ...
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What is the C runtime library?

... "libc" is the (more or less) traditional name for the C library. The "mt" means "multi-threaded". A "debug" version would have a "d" added to the end, giving "libcmtd". As far as what functions it includes, the C standard (part 7, if you happen to care) defines a set of functions a conforming (host...
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Node.js: what is ENOSPC error and how to solve?

... no space on drive? Sure, the error code makes sense once you know what it means (Error NO SPaCe), but why not just give users that info up front? – Shadoninja Jun 21 '19 at 15:16 ...
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How do I dump an object's fields to the console?

... "<=", "<=>", "==", "===", "=~", ">", ">=", "[]", "[]=", "__id__", "__send__", "all?", "any?", "between?", "capitalize", "capitalize!", "casecmp", "center", "chomp", "chomp!", "chop", "chop!", "class", "clone", "collect", "concat", "count", "crypt", "delete", "delete!", "detect", "dis...
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How to make gradient background in android

...> type="radial" Set the gradientRadius for a radial type. Using %p means it is a percentage of the smallest dimension of the parent. <gradient android:type="radial" android:gradientRadius="10%p" android:startColor="#f6ee19" android:endColor="#115ede" /> type="swee...
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Highlight a word with jQuery

...ment.createElement('span'); spannode.className = 'highlight'; var middlebit = node.splitText(pos); var endbit = middlebit.splitText(pat.length); var middleclone = middlebit.cloneNode(true); spannode.appendChild(middleclone); middlebit.parentNode.replaceChild(spannode, middleb...
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How to get a list of column names on Sqlite3 database?

... something like this... but it don't work create temporary table TmpCols (cid integer, name text, type text, nn bit, dflt_value, pk bit); .mode insert TmpCols .output cols PRAGMA TABLE_INFO('yourtable'); .read cols .mode csv .output stdout – Jason Jan 5 '1...
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How do I find out my python path using python?

... And if receive a KeyError, does it means that PYTHONPATH is not defined in my system? Is that a problem? Thanks – glarrain Sep 13 '11 at 19:56 ...
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CSV in Python adding an extra carriage return, on Windows

... BEWARE: using this means \r is no longer escaped! Looks like this is bug in csvwriter, but as it stands, outputting non-conformant CSV means this is not the way to go. – flow2k Mar 8 '19 at 21:41 ...