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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...this has happened with regularity for me is when I'm looping through a dataset and attempting to inject the data into a collection.
The array that holds the injection data must be explicitly reset on each iteration - even if you aren't specifying the _id value. For some reason, the INSERT process a...
base64 encoded images in email signatures
...way to know is to test several major email clients with different security settings applied. Further complicating the matter is that you can receive email both on the web and in a variety of clients. For example, Gmail may behave differently when viewed on the web versus inside of Outlook or Thunder...
Remove an entire column from a data.frame in R
...
You can set it to NULL.
> Data$genome <- NULL
> head(Data)
chr region
1 chr1 CDS
2 chr1 exon
3 chr1 CDS
4 chr1 exon
5 chr1 CDS
6 chr1 exon
As pointed out in the comments, here are some other possibilitie...
android ellipsize multiline textview
...ut;
import android.text.TextUtils.TruncateAt;
import android.util.AttributeSet;
import android.widget.TextView;
public class EllipsizingTextView extends TextView {
private static final String ELLIPSIS = "...";
public interface EllipsizeListener {
void ellipsizeStateChanged(boolean ...
Regular expressions in C: examples?
...rn;
PCRE2_SPTR subject;
int errornumber;
int i;
int rc;
PCRE2_SIZE erroroffset;
PCRE2_SIZE *ovector;
size_t subject_length;
pcre2_match_data *match_data;
char * RegexStr = "(?:\\D|^)(5[1-5][0-9]{2}(?:\\ |\\-|)[0-9]{4}(?:\\ |\\-|)[0-9]{4}(?:\\ |\\-|)[0-9]{4})(?:\\D|$)";
char * source = "5111 2222 3...
How to set a cookie for another domain
... and when a specific page of this site is loaded, say page link, I like to set a cookie for another site called b.com , then redirect the user to b.com .
...
ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
... state of one entry to 'Modified'. Before changing the state, the state is set to 'Detached' but calling Attach() does throw the same error. I'm using EF6.
...
How to remove multiple indexes from a list at the same time? [duplicate]
...ping for delete ? Why if you loop in normal order it raise an undefined offset exception ?
– kitensei
Jun 20 '14 at 21:19
...
What is the difference between active and passive FTP?
...nt data transfer to finish. As per the RFC, this is only mandated for a subset of commands, such as quitting, aborting the current transfer, and getting the status.
In active mode, the client establishes the command channel but the server is responsible for establishing the data channel. This can...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...文件夹
#存放整个mongodb文件
mkdir -p /data/mongodbtest/replset
#存放mongodb数据文件
mkdir -p /data/mongodbtest/replset/data
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_6...