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How to check if a file contains a specific string using Bash
...n't need the string displayed when it was found.
The grep command returns 0 or 1 in the exit code depending on
the result of search. 0 if something was found; 1 otherwise.
$ echo hello | grep hi ; echo $?
1
$ echo hello | grep he ; echo $?
hello
0
$ echo hello | grep -q he ; echo $?
0
You can sp...
Password masking console application
...Info.Key;
if (key == ConsoleKey.Backspace && pass.Length > 0)
{
Console.Write("\b \b");
pass = pass[0..^1];
}
else if (!char.IsControl(keyInfo.KeyChar))
{
Console.Write("*");
pass += keyInfo.KeyChar;
}
} while (key != ConsoleKey.Ent...
What is the closest thing Windows has to fork()?
...
answered Jun 12 '09 at 7:07
Laurynas BiveinisLaurynas Biveinis
10.3k33 gold badges4747 silver badges6161 bronze badges
...
How to get year/month/day from a date object?
alert(dateObj) gives Wed Dec 30 2009 00:00:00 GMT+0800
16 Answers
16
...
Drop all duplicate rows across multiple columns in Python Pandas
...ort pandas as pd
df = pd.DataFrame({"A":["foo", "foo", "foo", "bar"], "B":[0,1,1,1], "C":["A","A","B","A"]})
df.drop_duplicates(subset=['A', 'C'], keep=False)
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|...
Mac OSX Lion DNS lookup order [closed]
...
10 Answers
10
Active
...
CSS3's border-radius property and border-collapse:collapse don't mix. How can I use border-radius to
...his:
table tr:last-child td:first-child {
border-bottom-left-radius: 10px;
}
table tr:last-child td:last-child {
border-bottom-right-radius: 10px;
}
Now everything rounds properly, except that there's still the issue of border-collapse: collapse breaking everything.
A workaround is to ...
How to use ADB to send touch events to device using sendevent command?
...
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edited Oct 20 '15 at 15:25
Yaron
1,05111 gold badge1414 silver badges2929 bronze badges
an...
Should you always favor xrange() over range()?
...original)
+++ range_test.py (refactored)
@@ -1,7 +1,7 @@
for x in range(20):
- a=range(20)
+ a=list(range(20))
b=list(range(20))
c=[x for x in range(20)]
d=(x for x in range(20))
- e=xrange(20)
+ e=range(20)
As you can see, when used in a for loop or comprehension, or ...
How can I make my flexbox layout take 100% vertical space?
...
You should set height of html, body, .wrapper to 100% (in order to inherit full height) and then just set a flex value greater than 1 to .row3 and not on the others.
.wrapper, html, body {
height: 100%;
margin: 0;
}
.wrapper {
display: flex;
flex-directio...