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How to find out which package version is loaded in R?
... LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] graphics grDevices utils datasets stats grid methods base
other attached packages:
[1] ggplot2_0.9.0 reshape2_1.2.1 plyr_1.7.1
loaded via a namespace (and not attached):
[1] co...
为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...
...术注释
调整后的峰值性能（APP）是指数字计算机在进行64位或更多位的浮点加法和乘法运算的调整后的峰值速度。
本技术说明涉及的缩写：
n “数字计算机”中的处理器数量
I 处理器编号（1，……，n）
ti 处理器时钟周期（...
What characters can be used for up/down triangle (arrow without stem) for display in HTML?
...
U+26AB ⚫ MEDIUM BLACK CIRCLE
U+26BD ⚽ SOCCER BALL
U+26BE ⚾ BASEBALL
U+26BF ⚿ SQUARED KEY
U+26C0 ⛀ WHITE DRAUGHTSMAN
U+26C1 ⛁ WHITE DRAUGHTS KING
U+26C2 ⛂ BLACK DRAUGHTSMAN
U+26C3 ⛃ BLACK DRAUGHTS KING
U+26C4 ⛄ SNOWMAN WITHOUT SNOW
U+26C5 ⛅ SUN BEHIN...
Do try/catch blocks hurt performance when exceptions are not thrown?
...r version), but it was no difference in the Release version.
Conclution:
Based on these test, I think we can say that Try/Catch does have a small impact on performance.
EDIT:
I tried to increase the loop value from 10000000 to 1000000000, and ran again in Release to get some differences in the re...
How to have favicon / icon set when bookmarklet dragged to toolbar?
...t;<A HREF="http://mail.google.com/mail/u/0/#inbox" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABV0lEQVQ4jdWQzUoCYRiFnxl/0plso0IKX7mqXWCLIlq0qEW4d19Qi6BLCELwEgpvQbyAVrroCrSNUJFGAyrkEEEMNs5PCxtRHGsZneX7nedwzgd/LQngObfnykIQOj9Disd/BFxdZ3hVwtE0Mje3kuw9OJqGWSji1BtzYafeGH...
A fast method to round a double to a 32-bit int explained
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I get a precise time, for example in milliseconds in Objective-C?
...e is a weird conversion - last line of the first example is "return * (uint64_t *) &elapsedNano;" why not just "return (uint64_t)elapsedNano" ?
– Tyler
Dec 29 '10 at 23:00
8
...
How do I initialize a byte array in Java?
...)
Alternatively you could use Google Guava:
import com.google.common.io.BaseEncoding;
private static final byte[] CDRIVES = BaseEncoding.base16().lowerCase().decode("E04FD020ea3a6910a2d808002b30309d".toLowerCase());
The Guava method is overkill, when you are using small arrays. But Guava has al...
How to set an “Accept:” header on Spring RestTemplate request?
...
{
String notEncoded = user + ":" + password;
String encodedAuth = Base64.getEncoder().encodeToString(notEncoded.getBytes());
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.add("Authorization", "Basic " + encodedAuth);
ret...
Find objects between two dates MongoDB
...: "example", "created_at" : "Sun May 30 2010 00:00:00 GMT+0300 (EEST)" }
Based on my experiments you will need to serialize your dates into a format that MongoDB supports, because the following gave undesired search results.
items.save({
name: "example",
created_at: "Sun May 30 18.49:00 +...