Mixing
can someone please elaborate the following code?
This code is the first one I've seen. I am curious as to how it changes all character from a to z into uppercase when the last line of code was only written with (ch[i] - 'a' + 'A').
if (ch[i] >= 'a' && ch[i] <= 'z') {
// Convert into Upper-case
ch[i] = (char)(ch[i] - 'a' + 'A');
}
java
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
add a comment |
This code is the first one I've seen. I am curious as to how it changes all character from a to z into uppercase when the last line of code was only written with (ch[i] - 'a' + 'A').
if (ch[i] >= 'a' && ch[i] <= 'z') {
// Convert into Upper-case
ch[i] = (char)(ch[i] - 'a' + 'A');
}
java
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
6
The difference between'a'and'A'is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple'a'-'z'characters).
– khelwood
Nov 22 '18 at 13:56
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04
add a comment |
This code is the first one I've seen. I am curious as to how it changes all character from a to z into uppercase when the last line of code was only written with (ch[i] - 'a' + 'A').
if (ch[i] >= 'a' && ch[i] <= 'z') {
// Convert into Upper-case
ch[i] = (char)(ch[i] - 'a' + 'A');
}
java
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
This code is the first one I've seen. I am curious as to how it changes all character from a to z into uppercase when the last line of code was only written with (ch[i] - 'a' + 'A').
if (ch[i] >= 'a' && ch[i] <= 'z') {
// Convert into Upper-case
ch[i] = (char)(ch[i] - 'a' + 'A');
}
java
java
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
edited Nov 22 '18 at 13:55
khelwood
31.6k74365
31.6k74365
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
asked Nov 22 '18 at 13:53
Okabe RintarouOkabe Rintarou
93
93
what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
6
The difference between'a'and'A'is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple'a'-'z'characters).
– khelwood
Nov 22 '18 at 13:56
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04
add a comment |
what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
6
The difference between'a'and'A'is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple'a'-'z'characters).
– khelwood
Nov 22 '18 at 13:56
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04
what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
6
6
The difference between
'a' and 'A' is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple 'a'-'z' characters).– khelwood
Nov 22 '18 at 13:56
The difference between
'a' and 'A' is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple 'a'-'z' characters).– khelwood
Nov 22 '18 at 13:56
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04
add a comment |
1 Answer
1
active
oldest
votes
The line:
ch[i] = (char)(ch[i] - 'a' + 'A');
Sets ch[i] to its associated uppercase due to a constant difference between an uppercase letter and its lowercase form.
For means of communication, the line can be re-written as:
ch[i] = (char)(ch[i] + ('A' - 'a'));
By adding this constant difference the line yields the lowercase letter's uppercase character.
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The line:
ch[i] = (char)(ch[i] - 'a' + 'A');
Sets ch[i] to its associated uppercase due to a constant difference between an uppercase letter and its lowercase form.
For means of communication, the line can be re-written as:
ch[i] = (char)(ch[i] + ('A' - 'a'));
By adding this constant difference the line yields the lowercase letter's uppercase character.
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
add a comment |
The line:
ch[i] = (char)(ch[i] - 'a' + 'A');
Sets ch[i] to its associated uppercase due to a constant difference between an uppercase letter and its lowercase form.
For means of communication, the line can be re-written as:
ch[i] = (char)(ch[i] + ('A' - 'a'));
By adding this constant difference the line yields the lowercase letter's uppercase character.
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
add a comment |
The line:
ch[i] = (char)(ch[i] - 'a' + 'A');
Sets ch[i] to its associated uppercase due to a constant difference between an uppercase letter and its lowercase form.
For means of communication, the line can be re-written as:
ch[i] = (char)(ch[i] + ('A' - 'a'));
By adding this constant difference the line yields the lowercase letter's uppercase character.
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
The line:
ch[i] = (char)(ch[i] - 'a' + 'A');
Sets ch[i] to its associated uppercase due to a constant difference between an uppercase letter and its lowercase form.
For means of communication, the line can be re-written as:
ch[i] = (char)(ch[i] + ('A' - 'a'));
By adding this constant difference the line yields the lowercase letter's uppercase character.
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
edited Nov 22 '18 at 15:09
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
answered Nov 22 '18 at 14:29
W.AmbrozicW.Ambrozic
901212
901212
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
add a comment |
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
Java uses the UTF-16 character encoding of the Unicode character set. Any similarity to ASCII is irrelevant.
– Tom Blodget
Nov 22 '18 at 15:02
add a comment |
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what do you think it does?
– Stultuske
Nov 22 '18 at 13:54
6
The difference between
'a'and'A'is the same as the difference between any lower case letter and its upper case equivalent (in the range of simple'a'-'z'characters).– khelwood
Nov 22 '18 at 13:56
This also assumes that the letters that are used that require casing are only the Basic Latin letters.
– Tom Blodget
Nov 22 '18 at 15:04