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Can an int be null in Java?
... primitive types,we have fixed memory size i.e for int we have 4 bytes and char we have 2 bytes. And null is used only for objects because there memory size is not fixed.
So by default we have,
int a=0;
and not
int a=null;
Same with other primitive types and hence null is only used for...
How to HTML encode/escape a string? Is there a built-in?
...d string that I want to show as text in an HTML page. I need to escape the chars ' < ' and ' & ' as HTML entities. The less fuss the better.
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How to grep a text file which contains some binary data?
...<test.log | grep whatever
This will change anything less than a space character (except newline) and anything greater than 126, into a . character, leaving only the printables.
If you want every "illegal" character replaced by a different one, you can use something like the following C progr...
NSString tokenize in Objective-C
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@Adam, I think what you wanted was componentsSeparatedByCharactersInSet. See answer below.
– Wienke
Aug 28 '12 at 0:01
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When should I use nil and NULL in Objective-C?
...ke a C pointer) in Objective-C. Like nil , NULL got no value nor address.
char *myChar = NULL;
struct MyStruct *dStruct = NULL;
So if there is a situation, when I need to check my struct (structure type variable) is empty or not then, I will use:
if (dStruct == NULL)
NSLog("The struct is emp...
Convert InputStream to byte array in Java
...lass DataInputStream is primary used to read primary types (Longs, Shorts, Chars...) from a stream, so we can see this usage as a misuse of the class.
– Olivier Faucheux
Apr 8 '15 at 11:51
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How do I check if a variable exists in a list in BASH
... give false positive if the user input contains regular expression special characters, for example x=.
– glenn jackman
Nov 9 '11 at 11:41
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Can I use a function for a default value in MySql?
...m literal constant default values.
CREATE TABLE t1 (
uuid_field VARCHAR(32) DEFAULT (uuid()),
binary_uuid BINARY(16) DEFAULT (UUID_TO_BIN(UUID()))
);
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maxlength ignored for input type=“number” in Chrome
...rch, password, tel, or url, this attribute specifies the maximum number of characters (in Unicode code points) that the user can enter; for other control types, it is ignored.
So maxlength is ignored on <input type="number"> by design.
Depending on your needs, you can use the min and max at...
Java String to SHA1
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Using Guava Hashing class:
Hashing.sha1().hashString( "password", Charsets.UTF_8 ).toString()
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