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Preserve colouring after piping grep to grep
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A word of advice:
When using grep --color=always, the actual strings being passed on to the next pipe will be changed. This can lead to the following situation:
$ grep --color=always -e '1' * | grep -ve '12'
11
12
13
Even though the option -ve '12' should exclude the middle line, it...
Is there a “not in” operator in JavaScript for checking object properties?
... @MajidFouladpour id is an variable that could have any value, 'id' is a string with the two letters i and d, so hasOwnProperty(id) checks if the property specified in the variable id exists, and hasOwnProperty('id') checks if there is a property named id.
– some
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What does flushing the buffer mean?
...ing cin flushes cout so you don't need an explicit flush to do this:
std::string colour;
std::cout << "Enter your favourite colour: ";
std::cin >> colour;
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Update git commit author date when amending
...erything is much easier than original answer made us think, just use empty string!
git commit --date= --amend
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Fastest way to convert Image to Byte array
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public static byte[] ReadImageFile(string imageLocation)
{
byte[] imageData = null;
FileInfo fileInfo = new FileInfo(imageLocation);
long imageFileLength = fileInfo.Length;
FileStream fs = new FileStream(imageLocation, FileM...
Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
...L but offers additional features, most notably method invocation and basic string templating functionality."
– Fritz Duchardt
Jun 17 '15 at 8:23
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What is the minimum length of a valid international phone number?
...f the number is in valid E164 format. Its pretty good!
Taking an example:
String phoneNumberE164Format = "+14167129018"
PhoneNumberUtil phoneUtil = PhoneNumberUtil.getInstance();
try {
PhoneNumber phoneNumberProto = phoneUtil.parse(phoneNumberE164Format, null);
boolean isValid = phoneUtil.i...
Linq order by boolean
I've got a linq query that I want to order by f.bar, which is a string, but I also want to order it by f.foo, which is a boolean field, first. Like the query below.
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How to create and handle composite primary key in JPA
...ddedId
private MyKey myKey;
@Column(name = "ColumnA")
private String columnA;
/** Your getters and setters **/
}
@Embeddable
public class MyKey implements Serializable {
@Column(name = "Id", nullable = false)
private int id;
@Column(name = "Version", nullable = fa...
Difference between Hive internal tables and external tables?
...t uses to keep track of state.
For instance, when you CREATE TABLE FOO(foo string) LOCATION 'hdfs://tmp/';, this table schema is stored in the database.
If you have a partitioned table, the partitions are stored in the database(this allows hive to use lists of partitions without going to the file-s...