How to use “readline()” function in JavaScript?
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I was learning 去哪儿网-2017笔试题 and programing. In my program, I want to use readline() function to read a single line from input from stdin. I know that readline() function belongs to JavaScript Shell according to MDN. But the function is not defined when I run the code in my browser.
var line;
while (line = read_line()) {
while (line.indexOf(" ") != -1) {
line = line.replace(" ", "");
}
if (line.length <= 6) {
print(line);
} else if (line.length > 6 && line.length <= 14) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6);
print(line1 + " " + line2);
} else if (line.length > 14 && line.length <= 18) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6, 14);
var line3 = line.substring(14);
print(line1 + " " + line2 + " " + line3);
}
}
If I want to run the code in my browser. What should I do?
Thank you very much.
javascript
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
|
show 2 more comments
I was learning 去哪儿网-2017笔试题 and programing. In my program, I want to use readline() function to read a single line from input from stdin. I know that readline() function belongs to JavaScript Shell according to MDN. But the function is not defined when I run the code in my browser.
var line;
while (line = read_line()) {
while (line.indexOf(" ") != -1) {
line = line.replace(" ", "");
}
if (line.length <= 6) {
print(line);
} else if (line.length > 6 && line.length <= 14) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6);
print(line1 + " " + line2);
} else if (line.length > 14 && line.length <= 18) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6, 14);
var line3 = line.substring(14);
print(line1 + " " + line2 + " " + line3);
}
}
If I want to run the code in my browser. What should I do?
Thank you very much.
javascript
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
2
From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
1
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
2
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,jsc. You can't run it in a browser.
– Jared Smith
Mar 10 '17 at 15:29
1
@mplungjan itsjsc. Predates (and largely superceded by) node.
– Jared Smith
Mar 10 '17 at 15:31
|
show 2 more comments
I was learning 去哪儿网-2017笔试题 and programing. In my program, I want to use readline() function to read a single line from input from stdin. I know that readline() function belongs to JavaScript Shell according to MDN. But the function is not defined when I run the code in my browser.
var line;
while (line = read_line()) {
while (line.indexOf(" ") != -1) {
line = line.replace(" ", "");
}
if (line.length <= 6) {
print(line);
} else if (line.length > 6 && line.length <= 14) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6);
print(line1 + " " + line2);
} else if (line.length > 14 && line.length <= 18) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6, 14);
var line3 = line.substring(14);
print(line1 + " " + line2 + " " + line3);
}
}
If I want to run the code in my browser. What should I do?
Thank you very much.
javascript
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
I was learning 去哪儿网-2017笔试题 and programing. In my program, I want to use readline() function to read a single line from input from stdin. I know that readline() function belongs to JavaScript Shell according to MDN. But the function is not defined when I run the code in my browser.
var line;
while (line = read_line()) {
while (line.indexOf(" ") != -1) {
line = line.replace(" ", "");
}
if (line.length <= 6) {
print(line);
} else if (line.length > 6 && line.length <= 14) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6);
print(line1 + " " + line2);
} else if (line.length > 14 && line.length <= 18) {
var line1 = line.substring(0, 6);
var line2 = line.substring(6, 14);
var line3 = line.substring(14);
print(line1 + " " + line2 + " " + line3);
}
}
If I want to run the code in my browser. What should I do?
Thank you very much.
javascript
javascript
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
edited Jan 13 '18 at 18:21
antzshrek
3,00031735
3,00031735
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
asked Mar 10 '17 at 15:25
lbs0912lbs0912
961111
961111
2
From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
1
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
2
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,jsc. You can't run it in a browser.
– Jared Smith
Mar 10 '17 at 15:29
1
@mplungjan itsjsc. Predates (and largely superceded by) node.
– Jared Smith
Mar 10 '17 at 15:31
|
show 2 more comments
2
From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
1
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
2
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,jsc. You can't run it in a browser.
– Jared Smith
Mar 10 '17 at 15:29
1
@mplungjan itsjsc. Predates (and largely superceded by) node.
– Jared Smith
Mar 10 '17 at 15:31
2
2
From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
1
1
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
2
2
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,
jsc. You can't run it in a browser.– Jared Smith
Mar 10 '17 at 15:29
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,
jsc. You can't run it in a browser.– Jared Smith
Mar 10 '17 at 15:29
1
1
@mplungjan its
jsc. Predates (and largely superceded by) node.– Jared Smith
Mar 10 '17 at 15:31
@mplungjan its
jsc. Predates (and largely superceded by) node.– Jared Smith
Mar 10 '17 at 15:31
|
show 2 more comments
1 Answer
1
active
oldest
votes
As you mentioned above and the documentation says Introduction to the JavaScript shell
it is a command line options and you have to run that over the command shell. Also, you can check SpiderMonkey to have a better understanding.
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
add a comment |
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As you mentioned above and the documentation says Introduction to the JavaScript shell
it is a command line options and you have to run that over the command shell. Also, you can check SpiderMonkey to have a better understanding.
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
add a comment |
As you mentioned above and the documentation says Introduction to the JavaScript shell
it is a command line options and you have to run that over the command shell. Also, you can check SpiderMonkey to have a better understanding.
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
add a comment |
As you mentioned above and the documentation says Introduction to the JavaScript shell
it is a command line options and you have to run that over the command shell. Also, you can check SpiderMonkey to have a better understanding.
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
As you mentioned above and the documentation says Introduction to the JavaScript shell
it is a command line options and you have to run that over the command shell. Also, you can check SpiderMonkey to have a better understanding.
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
answered Jun 19 '17 at 14:12
3p3ch33p3ch3
1418
1418
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From where are you expecting to read? You do not have a file. Browser based JS does not have stdin - or are you talking node.js?
– mplungjan
Mar 10 '17 at 15:27
You can't read from stdin in javascript
– Dave Clough
Mar 10 '17 at 15:28
1
It's for the js shell command line program which has nothing to do with js within a web browser. Where would it even read from?
– Alex K.
Mar 10 '17 at 15:28
2
The function, and the mdn page you link to, are about writing programs for the JavaScript shell,
jsc. You can't run it in a browser.– Jared Smith
Mar 10 '17 at 15:29
1
@mplungjan its
jsc. Predates (and largely superceded by) node.– Jared Smith
Mar 10 '17 at 15:31