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mongo - couldn't connect to server 127.0.0.1:27017
...ress 'Ctrl+c' or quit it.)
Type the command to start mongo now in another window.
Hope this works for you !
for those who want to repair your data files while preserving the original files
mongo recover
...
how to implement a pop up dialog box in iOS
...isplay a pop up or alert box conveying a message to the user. Does anyone know where I can find more information about this?
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Redeploy alternatives to JRebel [closed]
...ux. Starting with Java 11 the project moved to a new GitHub repository and now also provides binaries for OS X.
DCEVM is packaged for Debian and Ubuntu, it's conveniently integrated with OpenJDK and can be invoked with java -dcevm. The name of the package depends on the version of the default JDK:
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How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterat
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Thanks, now everything works fine :) I think this answer is the best, because the code is easily readable.
– Ernestas Gruodis
Aug 26 '13 at 16:40
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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
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rs.initiate(config);
#输出成功
{
"info" : "Config now saved locally. Should come online in about a minute.",
"ok" : 1
}
#查看日志，副本集启动成功后，138为主节点PRIMARY，136、137为副本节点SECONDARY。
Sun Dec 29 20:26:13.842 [conn3]...
Remove or uninstall library previously added : cocoapods
...(alt+shift+command+K), and the warnings/linker errors were gone. Pods were now successfully uninstalled from the project.
– Mark Barrasso
Jan 30 '17 at 21:30
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Left Align Cells in UICollectionView
... the array. You may look into the source code for its implementation.)
So now the only thing we have to do is to implement the layoutAttributesForItem(at indexPath: IndexPath) function properly. The super class UICollectionViewFlowLayout already puts the correct number of cells in each line so we o...
How do I append one string to another in Python?
...ference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
used to be O(n^2), but now it is O(n).
From the source...
foreach vs someList.ForEach(){}
.... e.g. a block of code for reading rows from a dataReader.
I still don't know exactly why they did this.
The drawbacks of list.ForEach() are:
It is more verbose in C# 2.0. However, in C# 3 onwards, you can use the "=>" syntax to make some nicely terse expressions.
It is less familiar. People ...
Extending from two classes
...nterface BarInterface {
public int methodC(int i);
//...
}
And now make Foo and Bar implement the relative interfaces:
public class Foo implements FooInterface { /*...*/ }
public class Bar implements BarInterface { /*...*/ }
Now, with class FooBar, you can implement both FooInterface...