大约有 2,167 项符合查询结果(耗时:0.0149秒) [XML]

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How do I check to see if a value is an integer in MySQL?

...NED ) // will return 0 if not numeric string. for example SELECT CAST('a123' AS UNSIGNED) // returns 0 SELECT CAST('123' AS UNSIGNED) // returns 123 i.e. > 0 share | improve this answer ...
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What is a None value?

...ist.append(val) return list list1 = extendList(10) list2 = extendList(123,[]) list3 = extendList('a') print "list1 = %s" % list1 print "list2 = %s" % list2 print "list3 = %s" % list3 Now try to guess output of above list. Well, the answer is surprisingly as below: list1 = [10, 'a'] list2 = ...
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Can I convert a C# string value to an escaped string literal

... Does not work. If I have "abc\n123" (without quotes, 8 chars), I want "abc" + \n + "123" (7 chars). Instead it produces "abc" + "\\" + "\n123" (9 chars). Notice the slash was doubled and it still contains a string literal of "\n" as two characters, not t...
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What is the maximum length of latitude and longitude? [closed]

... misleading. A completely different issue. – bugmenot123 May 2 '18 at 15:03 Do you know why the valid latitudes are fr...
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Get querystring from URL using jQuery [duplicate]

...DOM/window.location Example: // URL = https://example.com?a=a%20a&b=b123 console.log(location.search); // Prints "?a=a%20a&b=b123" In regards to retrieving specific querystring parameters, while although classes like URLSearchParams and URL exist, they aren't supported by Internet Explo...
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Normal arguments vs. keyword arguments

...ords in the front. They can be in any order! func(foo="bar", baz=5, hello=123) func(baz=5, foo="bar", hello=123) You should also know that if you use default arguments and neglect to insert the keywords, then the order will then matter! def func(foo=1, baz=2, hello=3): ... func("bar", 5, 123) ...
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How to send and retrieve parameters using $state.go toParams and $stateParams?

... So also you should pass toParams as array like this: params = { 'index': 123, 'anotherKey': 'This is a test' } paramsArr = (val for key, val of params) $state.go('view', paramsArr) And you can access them via $stateParams as array like this: app.controller('overviewController', function($scope,...
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Difference between final and effectively final

...ited Aug 3 '18 at 16:13 user10111237 answered Jan 5 '14 at 19:32 Suresh AttaSuresh Atta ...
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How to split a string in Java

...} } public static void main(String[] args) { checkString("123-4567"); checkString("foo-bar"); checkString("123-"); checkString("-4567"); checkString("123-4567-890"); } } As the pattern is fixed in this instance, it can be compiled in advance and...
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Python equivalent for PHP's implode?

...t;?php declare(strict_types=1);var_dump(implode("glue",["startString",(int)123,"endString"])); gives you string(31) "startStringglue123glueendString" but in python doing "glue".join(["startString",123,"endString"]); gives you TypeError: sequence item 1: expected str instance, int found ...