大约有 25,300 项符合查询结果(耗时:0.0435秒) [XML]

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Check if inputs are empty using jQuery

...ing'); } }); If you're sure it will always operate on a textfield element then you can just use this.value. $('#apply-form input').blur(function() { if( !this.value ) { $(this).parents('p').addClass('warning'); } }); Also you should take note that $('input:text') gra...
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Better way to get type of a Javascript variable?

...ascript-typeof-operator/ He goes through the pros and cons of the various methods then defines a new method 'toType' - var toType = function(obj) { return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase() } ...
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Make a float only show two decimal places

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How to remove all characters after a specific character in python?

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Use PPK file in Mac Terminal to connect to remote connection over SSH [closed]

... What does this error mean when I try to run the puttygen command? Enter passphrase to load key: Assertion failed: (random_active), function random_byte, file ./../sshrand.c, line 313. Abort trap: 6 – fastasleep ...
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How to convert a char array to a string?

... It would still work either way. The overloaded assignment operator takes a const char*, so you can pass it a string literal or char array (which decays to that). – Mysticial Jan 22 '12 at 9:19 ...
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Beginner's guide to ElasticSearch [closed]

...ransferred over to the Elastic blog, and can be found by filtering on my name: https://www.elastic.co/blog/author/zachary-tong To be perfectly honest, the best source of beginner knowledge is now Elasticsearch - The Definitive Guide written by myself and Clinton Gormley. It assumes zero search ...
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What is an intuitive explanation of the Expectation Maximization technique? [closed]

Expectation Maximization (EM) is a kind of probabilistic method to classify data. Please correct me if I am wrong if it is not a classifier. ...
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How to convert a string to utf-8 in Python

... unicode. The unicode function does not exist anymore. See answer from @Noumenon share | improve this answer | follow | ...
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Kill a postgresql session/connection

... superuser to use this function. This works on all operating systems the same. SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE -- don't kill my own connection! pid <> pg_backend_pid() -- don't kill the connections to other databases AND datname = 'da...