大约有 35,100 项符合查询结果（耗时：0.0419秒） [XML]
Keep only first n characters in a string?
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You are looking for JavaScript's String method substring
e.g.
'Hiya how are you'.substring(0,8);
Which returns the string starting at the first character and finishing before the 9th character - i.e. 'Hiya how'.
substring documenta...
When to use “new” and when not to, in C++? [duplicate]
When should I use the "new" operator in C++? I'm coming from C#/Java background and instantiating objects is confusing for me.
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Default parameter for CancellationToken
I have some async code that I would like to add a CancellationToken to. However, there are many implementations where this is not needed so I would like to have a default parameter - perhaps CancellationToken.None . However,
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How do I update all my CPAN modules to their latest versions?
...an-outdated.
These are so easy and nimble to use that I hardly ever go back to CPAN shell. To upgrade all of your modules in one go, the command is:
cpan-outdated -p | cpanm
I recommend you install cpanminus like the docs describe:
curl -L https://cpanmin.us | perl - App::cpanminus
And then i...
Set value of textarea in jQuery
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enobrevenobrev
20.7k66 gold badges4040 silver badges5252 bronze badges
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How to store decimal values in SQL Server?
...ta type of a column in the SQL Server. I need to be able to store values like 15.5, 26.9, 24.7, 9.8, etc
8 Answers
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Eclipse doesn't highlight references anymore
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There's a little "highlighter" icon on the toolbar - it toggles "Mark Occurrences".
From the preferences window, the feature you mean is configured by navigating to:
Window -> Preferences -> Java -> Editor -> Mark Occurrences
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Using an if statement to check if a div is empty
...to see if one was found.
if( $('#leftmenu:empty').length ) {
// ...
Keep in mind that empty means no white space either. If there's a chance that there will be white space, then you can use $.trim() and check for the length of the content.
if( !$.trim( $('#leftmenu').html() ).length ) {
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What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...ing port can accept more than one connection simultaneously.
There is a '64K' limit that is often cited, but that is per client per server port, and needs clarifying.
Each TCP/IP packet has basically four fields for addressing. These are:
source_ip source_port destination_ip destination_port
< cl...
Recommended way to embed PDF in HTML?
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Peter Mortensen
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answered Nov 15 '08 at 0:01
lubos haskolubos ...