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What is the difference between Collection and List in Java?
...alized Collection, however.
A Collection is just that: a collection of items. You can add stuff, remove stuff, iterate over stuff and query how much stuff is in there.
A List adds the information about a defined sequence of stuff to it: You can get the elem>me m>nt at position n, you can add an elem>me m>nt...
Ant task to run an Ant target only if a file exists?
... that would execute a block only if a given file exists? I have the problem that I have a generic ant script that should do som>me m> special processing but only if a specific configuration file is present.
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Find out what process registered a global hotkey? (Windows API)
...A simple app then calls the DLL and reports back its results based on a TTim>me m>r event. If you're interested I can post the Delphi 2007 based code.
It's well docum>me m>nted and comm>me m>nted and you potentially could use it as a basis of working out where a key press is going. If you could get the handle of ...
Reference: Comparing PHP's print and echo
...t source code involves the parser as well as opcode handlers. Consider a simple action such as displaying the number zero. Whether you use echo or print, the sam>me m> handler " ZEND_ECHO_SPEC_CONST_HANDLER" will be invoked. The handler for print does one thing before it invokes the handler for echo, i...
Secondary axis with twinx(): how to add to legend?
...xes, using twinx() . I also give labels to the lines, and want to show them with legend() , but I only succeed to get the labels of one axis in the legend:
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How to check whether a string contains a substring in JavaScript?
Usually I would expect a String.contains() m>me m>thod, but there doesn't seem to be one.
3 Answers
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Python中的X[:,0]和X[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Python中的X[:,0]和X[:,1]X[:,0]是numpy中数组的一种写法,表示对一个二维数组,取该二维数组第一维中的所有数据,第二维中取第0个数据,直观来说,X[:,0]就是取所有 X[:,0]是numpy中数组的一种写法,表示对一个二维数组,取该二维...
In Firebase, is there a way to get the number of children of a node without loading all the node dat
... of data and then counts it client-side, which can be very slow for large amounts of data.
Firebase doesn't currently have a way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter of the number of children and update it every tim>me m>...
Iterate over model instance field nam>me m>s and values in template
...mplate to display the selected instance's field values, along with their nam>me m>s. Think of it as just a standard output of the values of that instance in table format, with the field nam>me m> (verbose_nam>me m> specifically if specified on the field) in the first column and the value of that field in the seco...
How to convert URL param>me m>ters to a JavaScript object?
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Edit
This edit improves and explains the answer based on the comm>me m>nts.
var search = location.search.substring(1);
JSON.parse('{"' + decodeURI(search).replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g,'":"') + '"}')
Example
Parse abc=foo&def=%5Basf%5D&xyz=5 in five ste...
