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What's the best practice to round a float to 2 decimals? [duplicate]
I'm using eclipse + Android SDK.
7 Answers
7
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Unittest setUp/tearDown for several tests
... is fired at the beginning/end of a scenario of tests? The functions setUp and tearDown are fired before/after every single test.
...
Generate random password string with requirements in javascript
I want to generate a random string that has to have 5 letters from a-z and 3 numbers.
18 Answers
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“ValueError: zero length field name in format” error in Python 3.0,3.1,3.2
I'm trying learn Python (3 to be more specific) and I'm getting this error:
3 Answers
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“Comparison method violates its general contract!”
...de throw an exception, "Comparison method violates its general contract!", and how do I fix it?
11 Answers
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How to Apply Gradient to background view of iOS Swift App
... a storyboard). The code runs, but nothing changes. I'm using xCode Beta 2 and Swift.
30 Answers
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Get local IP address in node.js
I have a simple node.js program running on my machine and I want to get local IP address of PC on which my program is running. How do I get it with node.js?
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Is it possible to simulate key press events programmatically?
...
A non-jquery version that works in both webkit and gecko:
var keyboardEvent = document.createEvent("KeyboardEvent");
var initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? "initKeyboardEvent" : "initKeyEvent";
keyboardEvent[initMethod](
"keydown", /...
Remove duplicated rows using dplyr
...mple(0:1, 10, replace = T),
z = 1:10
)
One approach would be to group, and then only keep the first row:
df %>% group_by(x, y) %>% filter(row_number(z) == 1)
## Source: local data frame [3 x 3]
## Groups: x, y
##
## x y z
## 1 0 1 1
## 2 1 0 2
## 3 1 1 4
(In dplyr 0.2 you won't need...
How to set Sqlite3 to be case insensitive when string comparing?
...ocase in the column definition (the other options are binary (the default) and rtrim; see here). You can specify collate nocase when you create an index as well. For example:
create table Test
(
Text_Value text collate nocase
);
insert into Test values ('A');
insert into Test values ('b');
i...